48 + Interview Questions in Non Destructive Techniques in Casting-Forming-Welding Ii Page 1 InterviewSolution

1.	In pulse-echo method, which defect does the following amplitude-time graph represent?(a) No defect(b) Small defect(c) Mediocre defect(d) Large defectThe question was posed to me in class test.This interesting question is from Ultrasonic Inspection in chapter Non Destructive Techniques of Casting-Forming-Welding II
Answer» The correct answer is (a) No defect The best I can EXPLAIN: Ultrasonic inspection METHOD further gets classified under one of the type of called pulse-ECHO method. It is the most commonly used ultrasonic testing method. The following GRAPH represents a no defect in pulse echo method.

Discussion

2.	What is typically the frequency used in ultrasonic inspection?(a) 0.1 MHz to 15 MHz(b) 0.5 MHz to 13 MHz(c) 1 MHz to 17 MHz(d) 1.8 MHz to 19 MHzI had been asked this question at a job interview.Asked question is from Ultrasonic Inspection topic in division Non Destructive Techniques of Casting-Forming-Welding II
Answer» Right answer is (a) 0.1 MHZ to 15 MHz The explanation: Ultrasonic TESTING is one of the most commonly USED METHOD for testing of MATERIALS. The general frequency of ultrasonic testing is in the range of 0.1 MHz to 15 MHz.

Discussion

3.	Which of the following defects are not detected by magnetic particle inspection?(a) Surface cracks(b) Quenching cracks(c) Thermal cracks(d) Fatigue cracksThe question was posed to me in an online interview.My doubt stems from Magnaflux Test in division Non Destructive Techniques of Casting-Forming-Welding II
Answer» RIGHT option is (a) SURFACE cracks The best explanation: Quenching cracks, THERMAL cracks, grinding cracks or fatigue cracks are a few types of DEFECTS which can be detected by magnetic PARTICLE test, whereas surface cracks are defects which can be detected by simple visual inspection.

Discussion

4.	In which of the following materials, ultrasonic testing cannot be used?(a) Plastics(b) Ceramics(c) Non-ferrous objects(d) Ferrous objectThis question was posed to me during an interview.The origin of the question is Ultrasonic Inspection in chapter Non Destructive Techniques of Casting-Forming-Welding II
Answer» Right OPTION is (d) Ferrous object The explanation: Ultrasonic testing is a method for detecting FLAWS in the article. It can be USED on various materials like plastics, CERAMICS and non-ferrous objects.

Discussion

5.	In through-transmission method, which defect does the following amplitude-time graph represent?(a) No defect(b) Small defect(c) Mediocre defect(d) Large defectThis question was addressed to me in exam.This interesting question is from Ultrasonic Inspection topic in division Non Destructive Techniques of Casting-Forming-Welding II
Answer» The correct option is (b) Small defect To explain: The FOLLOWING graph, here REPRESENTS small defect in through-transmission method. This is a type of through-transmission method. In this method, there are two probes, TRANSMITTER and RECEIVER.

Discussion

6.	For measuring glue line thickness between aluminium sheets, what should the thickness of the sheet be?(a) 1.2 mm(b) 1.4 mm(c) 1.6 mm(d) 1.8 mmI have been asked this question in an international level competition.My question is based upon Eddy Current Test in portion Non Destructive Techniques of Casting-Forming-Welding II
Answer» The correct ANSWER is (C) 1.6 mm The best I can explain: For measuring the glue line thickness of aluminium sheets using eddy CURRENT method, INITIALLY the surface has to be vitally cleaned. The thickness of the aluminium sheet for calculating glue line thickness is 1.6mm.

Discussion

7.	Only fluorescent dye is used in dye penetrant test.(a) True(b) FalseI had been asked this question in quiz.I want to ask this question from Dye Penetrant Test in section Non Destructive Techniques of Casting-Forming-Welding II
Answer» The CORRECT choice is (B) False To explain I would SAY: For the inspection using non-destructive testing, when dye penetrant test is used, there are two types of LIGHTS that are used. This type of light which has to be used DEPENDS upon the type of die used, fluorescent or non-fluorescent.

Discussion

8.	Ultrasonic testing is a portable process.(a) True(b) FalseI got this question in examination.The origin of the question is Ultrasonic Inspection topic in section Non Destructive Techniques of Casting-Forming-Welding II
Answer» RIGHT ANSWER is (a) True For EXPLANATION: NONE.

Discussion

9.	Multi frequency testing allows to overcome problems in eddy current testing.(a) True(b) FalseThis question was posed to me during an internship interview.The above asked question is from Eddy Current Test topic in chapter Non Destructive Techniques of Casting-Forming-Welding II
Answer» RIGHT answer is (a) True To ELABORATE: It is one of the limitations of eddy current testing that, below a certain thickness of the surface defect, the defect cannot be DETECTED. This PARTICULAR problem can be overcome by using multifrequency testing.

Discussion

10.	What is the maximum frequency used in the ultrasonic inspection?(a) 35 MHz(b) 40 MHz(c) 45 MHz(d) 50 MHzI had been asked this question in my homework.Question is from Ultrasonic Inspection topic in chapter Non Destructive Techniques of Casting-Forming-Welding II
Answer» Correct answer is (d) 50 MHz The BEST EXPLANATION: The maximum frequency that MAY be needed for an ultrasonic inspection is AROUND 50 MHz. Such frequencies make it easy for the devices to detect the flaws.

Discussion

11.	Small drilled hole was a reference calibration in eddy current testing because it was produced in precise sizes.(a) True(b) FalseI have been asked this question in unit test.This key question is from Eddy Current Test topic in portion Non Destructive Techniques of Casting-Forming-Welding II
Answer» Right option is (a) True For explanation: For making perfect measurements and calculations, a few artificial DEFECTS were tried and a SMALL HOLE was selected as the STANDARD. The small drilled hole was selected because, it was not just easy to produce, but also, it was produced in PRECISE sizes.

Discussion

12.	Half wave DC is more penetrative in magnaflux testing than full wave DC.(a) True(b) FalseThis question was addressed to me in a job interview.The query is from Magnaflux Test topic in section Non Destructive Techniques of Casting-Forming-Welding II
Answer» Right answer is (a) True Explanation: For the detection of sub SURFACE DEFECTS, a FULL wave direct current is needed. For the detection of surface BREAKING indication, a half wave direct current is needed. A half wave direct current is more penetrative than full wave direct current.

Discussion

13.	The penetration power of X-rays depends only on the wavelength of the radiation.(a) True(b) FalseI had been asked this question by my school teacher while I was bunking the class.Origin of the question is Radiography topic in portion Non Destructive Techniques of Casting-Forming-Welding II
Answer» Correct answer is (B) False The best I can EXPLAIN: In RADIOGRAPHY, there is an X-ray wave used for non-destructive testing. The penetration power of the X-ray depends not just on the wavelength of the radiation but also on the ABSORBING power of the MATERIAL.

Discussion

14.	With an increase in the density of the material who does it affect the power loss in eddy current?(a) Increases(b) Decreases(c) Does not change(d) Not relatedI have been asked this question in unit test.The query is from Eddy Current Test topic in chapter Non Destructive Techniques of Casting-Forming-Welding II
Answer» Correct answer is (b) Decreases The explanation is: ACCORDING to the power dissipation FORMULA for EDDY currents, power loss experienced is INVERSELY related to the density of the material, that is, with an increase in the density of the material, there is a DECREASE in the power loss.

Discussion

15.	Magnetic particles with fluorescent coating are seen under which light?(a) White light(b) Infrared light(c) Black light(d) Ultraviolet lightI got this question during a job interview.My question is based upon Magnaflux Test in chapter Non Destructive Techniques of Casting-Forming-Welding II
Answer» The CORRECT answer is (d) Ultraviolet light The explanation is: In magnetic particle testing, only ferrous materials can be tested using a magnetic particle test. The casting which is UNDERGOING magnetic inspection, if it is coated with FLUORESCENCE, then it has to be VIEWED in an ultraviolet light only.

Discussion

16.	Which of the following defect is not detected by dye penetrant test?(a) Non-metallic inclusions(b) Leaks(c) Cracks(d) Forging defectsI had been asked this question in an interview.I would like to ask this question from Dye Penetrant Test in portion Non Destructive Techniques of Casting-Forming-Welding II
Answer» Correct answer is (a) Non-metallic inclusions Explanation: Dye penetrant test is ONE of the METHODS of non-destructive testing of the COMPONENTS. LEAKS, cracks and forging defects are some defects which can be identified by using dye penetrant test. But, for detecting non-metallic inclusions, one will have to do a MAGNAFLUX test.

Discussion

17.	What is the conductivity of a 7075-T6 aluminium sheet with an average thickness of 1.6 mm?(a) 30 IACS(b) 31 IACS(c) 32 IACS(d) 33 IACSThis question was posed to me in an interview for internship.The origin of the question is Eddy Current Test in section Non Destructive Techniques of Casting-Forming-Welding II
Answer» The CORRECT ANSWER is (B) 31 IACS Explanation: NONE.

Discussion

18.	What is the heat generated in eddy current operations?(a) VI(b) VIR(c) I^2RT(d) I^2RThe question was asked in my homework.Question is taken from Eddy Current Test in portion Non Destructive Techniques of Casting-Forming-Welding II
Answer» The correct choice is (d) I^2R The BEST I can explain: Eddy current method of INSPECTION and heating techniques is used for METAL heating. The heat generated by this method can be GIVEN by I^2R, I is current and R is the resistance.

Discussion

19.	Eddy currents are not used for the measure of which of the following properties?(a) Electrical conductivity(b) Magnetic resistivity(c) Hardness(d) Grain sizeI have been asked this question during an interview for a job.My query is from Eddy Current Test in section Non Destructive Techniques of Casting-Forming-Welding II
Answer» Correct option is (b) Magnetic resistivity For explanation: The INSPECTION of structures DONE by eddy current method is based on the principle of electromagnetic induction. This method of DETECTING defects can be used for knowing the measure of ELECTRICAL conductivity, grain size, hardness and magnetic permeability.

Discussion

20.	Which of the following is not an excess penetrant remover?(a) Solvent removable(b) Water washable(c) Lipophilic pre-emulsifiable(d) Lipophilic post-emulsifiableI have been asked this question in my homework.My question comes from Dye Penetrant Test in section Non Destructive Techniques of Casting-Forming-Welding II
Answer» The CORRECT choice is (c) LIPOPHILIC pre-emulsifiable The best explanation: A penetrant remover MATERIAL HIGHLY depends on the type of material by which the penetrant is made. Among the following, a lipophilic pre-emulsifiable is not a type of excess penetrant remover.

Discussion

21.	Penetrants of which colour are not used?(a) Red(b) Blue(c) Green(d) YellowThe question was asked in a national level competition.The above asked question is from Dye Penetrant Test topic in division Non Destructive Techniques of Casting-Forming-Welding II
Answer» The correct choice is (a) Red To ELABORATE: The application of penetrant is ONE of the steps of INSPECTION of dye penetrant test. It is an important FEATURE that one must take care of, that the penetrant USED, must not be of red colour, as defects are identified using red colour.

Discussion

22.	The film produced by an X-ray is called as a radiograph.(a) True(b) FalseI had been asked this question in quiz.My doubt is from Radiography topic in chapter Non Destructive Techniques of Casting-Forming-Welding II
Answer» Correct OPTION is (b) False Explanation: The FILM produced by an X-ray is called as an exograph. The film that is produced using gamma rays is called as gamma GRAPH and the COMBINATION of the two is called as a radiograph.

Discussion

23.	What should the diameter of a Cobalt-60 source used for producing gamma rays?(a) 2 mm(b) 3 mm(c) 4 mm(d) 5 mmThis question was posed to me in an interview.My doubt stems from Radiography topic in section Non Destructive Techniques of Casting-Forming-Welding II
Answer»

Discussion

24.	Which of the following is not a type of penetrant application?(a) Dipping(b) Spraying(c) Brushing(d) PouringI have been asked this question during an interview.This intriguing question comes from Dye Penetrant Test in chapter Non Destructive Techniques of Casting-Forming-Welding II
Answer» Right choice is (d) POURING The best I can explain: The application of penetrant is ONE of the steps of inspection of the dye penetrant TEST. Among these, dipping, spraying or brushing are different ways by which penetrant can be applied, but not pouring.

Discussion

25.	What is the amount of time taken for blotting?(a) 5 minutes(b) 10 minutes(c) 15 minutes(d) 20 minutesThe question was posed to me in a job interview.My question comes from Dye Penetrant Test topic in chapter Non Destructive Techniques of Casting-Forming-Welding II
Answer» The correct choice is (B) 10 minutes Easy EXPLANATION: The process of inspection is one of the steps of the important of DYE penetrant test. The operation of inspection begins after the article is allowed to blot for AROUND ten minutes.

Discussion

26.	Ultrasonic testing is a low sensitivity testing method.(a) True(b) FalseI have been asked this question during an online interview.This intriguing question originated from Ultrasonic Inspection topic in section Non Destructive Techniques of Casting-Forming-Welding II
Answer» The CORRECT choice is (b) False Easiest explanation: Ultrasonic TESTING is known to have high penetrating POWERS, not just high penetrating powers, but they are also known to possess high SENSITIVITY.

Discussion

27.	Which of the following is not a type of developer?(a) Dry powder(b) Water soluble developer(c) Oil soluble developer(d) Water suspendible developerThis question was addressed to me during an online interview.This intriguing question comes from Dye Penetrant Test topic in section Non Destructive Techniques of Casting-Forming-Welding II
Answer» The correct answer is (C) Oil SOLUBLE DEVELOPER The best I can explain: Dye penetrant test is one of the METHODS of non-destructive testing of the components. The application of developer is one of the steps of inspection of dye penetrant test. Oil soluble developer is not a type of developer.

Discussion

28.	X-rays are useful in detecting defects in casts up to what thickness?(a) 60 mm(b) 61 mm(c) 62 mm(d) 63 mmI have been asked this question during an online exam.This is a very interesting question from Radiography in division Non Destructive Techniques of Casting-Forming-Welding II
Answer» Correct option is (c) 62 mm To EXPLAIN I would SAY: The X-rays are WAVES of high amount of energy in them and are very useful in the detection of defects in the casts. They need a high amount of VOLTAGE supply for this and are ABLE to detect defects up to a thickness of 62mm.

Discussion

29.	What is the lower range of wavelength of the X-rays?(a) 40 x 10^-7 cm(b) 40 x 10^-8 cm(c) 40 x 10^-9 cm(d) 40 x 10^-10 cmThis question was addressed to me during an online interview.My query is from Radiography topic in section Non Destructive Techniques of Casting-Forming-Welding II
Answer» Right choice is (B) 40 x 10^-8 cm To explain: The X-RAYS are considered to be rays having a SHORT wavelength. These X-rays can be PRODUCED with the help of an X-ray tube or a Cobalt-60 isotope. The longest wavelength of an X-ray is 40 x 10^-8 cm.

Discussion

30.	Eddy current inspection method cannot be detect which of the following defect?(a) Laps(b) Seams(c) Voids(d) Surface crackThe question was asked during an online exam.The query is from Eddy Current Test in portion Non Destructive Techniques of Casting-Forming-Welding II
Answer» CORRECT CHOICE is (d) SURFACE crack To EXPLAIN: NONE.

Discussion

31.	Magnetic field lines travel from north to south.(a) True(b) FalseThe question was asked during an online interview.This question is from Magnaflux Test in portion Non Destructive Techniques of Casting-Forming-Welding II
Answer» The correct CHOICE is (a) True Best explanation: MAGNETIC field LINES are imaginary lines, which travel from NORTH pole of the magnet to the south pole of the magnet. These lines do not travel through the SPECIMEN but around it.

Discussion

32.	What is the skin depth of copper at 60 Hz frequency?(a) 8 mm(b) 8.5 mm(c) 9 mm(d) 9.5 mmThis question was addressed to me during an interview for a job.This intriguing question originated from Magnaflux Test topic in section Non Destructive Techniques of Casting-Forming-Welding II
Answer» The correct option is (b) 8.5 mm Best explanation: The distribution of an ALTERNATING ELECTRIC current inside the conductor, and the flow of current through the SKIN of the material is called skin effect. The depth of the skin effect is skin depth. For copper, at frequency 60 Hz, the skin depth is 8.5mm.

Discussion

33.	On what voltage do the X-rays operate?(a) 350 kV(b) 375 kV(c) 400 kV(d) 475 kVThe question was posed to me in an interview.This interesting question is from Radiography in division Non Destructive Techniques of Casting-Forming-Welding II
Answer» Correct option is (c) 400 kV The best explanation: The X-ray are waves are having very SHORT wavelength. The OBJECT which has to be tested is exposed to the X-rays, for doing this, high VOLTAGE supply is required. The X-rays ideally operate on 400 kV.

Discussion

34.	What is the size range of dry particle powder?(a) 5 to 170 micrometers(b) 15 to 185 micrometers(c) 45 to 215 micrometers(d) 65 to 250 micrometersThe question was posed to me in exam.This interesting question is from Magnaflux Test topic in portion Non Destructive Techniques of Casting-Forming-Welding II
Answer» Right OPTION is (a) 5 to 170 micrometers The BEST I can explain: Dry particle powder is basically applied in the form of a spray or a cloud. This powder is DESIGNED to be seen in white LIGHT. The particle SIZE of dry particle powder is 5 to 170 micrometers.

Discussion

35.	Which current is helpful in detecting surface breaking indication?(a) High frequency AC(b) Low frequency AC(c) Full wave DC(d) Half wave DCI had been asked this question in class test.This key question is from Magnaflux Test topic in portion Non Destructive Techniques of Casting-Forming-Welding II
Answer» The CORRECT OPTION is (d) HALF WAVE DC Explanation: NONE.

Discussion

36.	The signal display of eddy current system does not take place on which of the following media?(a) Oscilloscope(b) Oscillograph(c) Electric tape(d) Magnetic tapeThis question was addressed to me in a national level competition.Asked question is from Eddy Current Test topic in portion Non Destructive Techniques of Casting-Forming-Welding II
Answer» Right choice is (c) Electric TAPE The BEST explanation: Eddy CURRENT method is used as a non-destructive technique. Most of the times, a magnetic tape is used or a OSCILLOSCOPE or an oscillograph, but not an electric tape.

Discussion

37.	In through-transmission method, which defect does the following amplitude-time graph represent?(a) No defect(b) Small defect(c) Mediocre defect(d) Large defectI got this question in an interview.My question comes from Ultrasonic Inspection in portion Non Destructive Techniques of Casting-Forming-Welding II
Answer» Right answer is (d) Large defect Easiest explanation: Ultrasonic INSPECTION method further gets classified under one of the type of called through-transmission method. In this method, there are TWO PROBES, transmitter and receiver. The following GRAPH represents large defect in through-transmission method.

Discussion

38.	For how long is a penetrant allowed to soak in cracks?(a) 5 to 15 minutes(b) 10 to 30 minutes(c) 15 to 35 minutes(d) 20 to 40 minutesI have been asked this question in my homework.Question is taken from Dye Penetrant Test in division Non Destructive Techniques of Casting-Forming-Welding II
Answer» The CORRECT option is (B) 10 to 30 minutes Explanation: None.

Discussion

39.	Eddy current testing does not work below what thickness of materials?(a) 0.1 mm(b) 0.2 mm(c) 0.3 mm(d) 0.4 mmThe question was asked during an interview.This is a very interesting question from Eddy Current Test topic in portion Non Destructive Techniques of Casting-Forming-Welding II
Answer» The correct choice is (a) 0.1 mm Best explanation: It is one of the limitations of eddy current that defects having a thickness larger than required cannot be detected USING eddy current method. Conventionally eddy current method cannot DETECT SURFACE defects below 0.1 mm.

Discussion

40.	For what thickness of a material, do the X-rays give the best results?(a) 50 mm(b) 55 mm(c) 60 mm(d) 65 mmI got this question in an interview for internship.I want to ask this question from Radiography in division Non Destructive Techniques of Casting-Forming-Welding II
Answer» Right OPTION is (a) 50 mm To elaborate: X-rays are considered to be having a larger wavelength as compared to that of gamma rays. Owing to this fact, the penetration power of the X-rays is less. Hence, for a shorter thickness, it would give good detection. The best RESULTS are OBTAINED in X-ray detection when the thickness of the MATERIAL is below 50mm.

Discussion

41.	Which of the following materials can be tested using magnetic particle testing?(a) Brass(b) Steel(c) Bronze(d) SolderThe question was asked in class test.This intriguing question comes from Magnaflux Test topic in division Non Destructive Techniques of Casting-Forming-Welding II
Answer» Correct answer is (b) STEEL For explanation: Among the following materials, only ferrous materials can be tested using a magnetic particle TEST, which is THEREFORE steel. Brass and bronze are COPPER alloys and solder is an alloy of zinc, lead and tin.

Discussion

42.	Which of the following is not a method of pre-cleaning?(a) Solvent(b) Acid blasting(c) Vapour degreasing(d) Media blastingI got this question during a job interview.My question is taken from Dye Penetrant Test in portion Non Destructive Techniques of Casting-Forming-Welding II
Answer» CORRECT option is (b) Acid blasting To explain I would say: The application of pre-cleaning is one of the steps of inspection of dye penetrant test. Solvent, alkaline, VAPOUR degreasing and MEDIA blasting are a few TYPES of pre-cleaning process, but not acid blasting.

Discussion

43.	Which current is helpful in detecting sub surface discontinuities?(a) High frequency AC(b) Low frequency AC(c) Full wave DC(d) Half wave DCThe question was asked in exam.This is a very interesting question from Magnaflux Test in division Non Destructive Techniques of Casting-Forming-Welding II
Answer» The CORRECT ANSWER is (c) Full WAVE DC Explanation: NONE.

Discussion

44.	In through-transmission method, which defect does the following amplitude-time graph represent?(a) No defect(b) Small defect(c) Mediocre defect(d) Large defectI got this question in examination.The question is from Ultrasonic Inspection topic in section Non Destructive Techniques of Casting-Forming-Welding II
Answer» RIGHT option is (a) No defect For EXPLANATION I WOULD SAY: None.

Discussion

45.	Which of the following can be a wavelength of gamma ray?(a) 2 x 10^-8 cm(b) 3 x 10^-8 cm(c) 4 x 10^-8 cm(d) 5 x 10^-8 cmI had been asked this question in an interview.This key question is from Radiography topic in division Non Destructive Techniques of Casting-Forming-Welding II
Answer» Correct option is (b) 3 X 10^-8 cm Best explanation: Gamma rays are supposedly KNOWN to have a shorter wavelength as compared to that of X-rays. The wavelength of gamma rays RANGES from 0.005 x 10^-8 cm to 3 x 10^-8 cm.

Discussion

46.	When an AC current is used for magnaflux test, what is its frequency?(a) 35 cycles/sec(b) 45 cycles/sec(c) 55 cycles/sec(d) 65 cycles/secI have been asked this question in class test.Origin of the question is Magnaflux Test topic in chapter Non Destructive Techniques of Casting-Forming-Welding II
Answer» The correct option is (c) 55 cycles/sec The best explanation: A magnaflux test is the one which is used for testing and detecting for any kind of thermal defect or any kind of QUENCHING crack. For doing this, an alternating current can be used. The frequency of the alternating current is in the range of 50 to 60 cycles every second.

Discussion

47.	Which of the following is not a source of production for gamma rays?(a) Cobalt-60(b) Iridium-192(c) Caesium-167(d) Americium-241The question was asked in final exam.The query is from Radiography topic in portion Non Destructive Techniques of Casting-Forming-Welding II
Answer» CORRECT choice is (d) Americium-241 Explanation: AMONG all the above given isotopes, a COBALT – 60 isotope, Iridium-192 isotope and a Caesium-167 isotope are mainly used for PRODUCING GAMMA rays but not Americium-241 isotope, it is used for making alpha rays.

Discussion

48.	Only ultraviolet light is used in dye penetrant test.(a) True(b) FalseI have been asked this question in a national level competition.My doubt is from Dye Penetrant Test in division Non Destructive Techniques of Casting-Forming-Welding II
Answer» RIGHT choice is (b) False The BEST explanation: NONE.

Discussion

Explore topic-wise InterviewSolutions in .

Only fluorescent dye is used in dye penetrant test.(a) True(b) FalseI had been asked this question in quiz.I want to ask this question from Dye Penetrant Test in section Non Destructive Techniques of Casting-Forming-Welding II

Ultrasonic testing is a portable process.(a) True(b) FalseI got this question in examination.The origin of the question is Ultrasonic Inspection topic in section Non Destructive Techniques of Casting-Forming-Welding II

Multi frequency testing allows to overcome problems in eddy current testing.(a) True(b) FalseThis question was posed to me during an internship interview.The above asked question is from Eddy Current Test topic in chapter Non Destructive Techniques of Casting-Forming-Welding II

What is the maximum frequency used in the ultrasonic inspection?(a) 35 MHz(b) 40 MHz(c) 45 MHz(d) 50 MHzI had been asked this question in my homework.Question is from Ultrasonic Inspection topic in chapter Non Destructive Techniques of Casting-Forming-Welding II

Small drilled hole was a reference calibration in eddy current testing because it was produced in precise sizes.(a) True(b) FalseI have been asked this question in unit test.This key question is from Eddy Current Test topic in portion Non Destructive Techniques of Casting-Forming-Welding II

Half wave DC is more penetrative in magnaflux testing than full wave DC.(a) True(b) FalseThis question was addressed to me in a job interview.The query is from Magnaflux Test topic in section Non Destructive Techniques of Casting-Forming-Welding II

The penetration power of X-rays depends only on the wavelength of the radiation.(a) True(b) FalseI had been asked this question by my school teacher while I was bunking the class.Origin of the question is Radiography topic in portion Non Destructive Techniques of Casting-Forming-Welding II

Magnetic particles with fluorescent coating are seen under which light?(a) White light(b) Infrared light(c) Black light(d) Ultraviolet lightI got this question during a job interview.My question is based upon Magnaflux Test in chapter Non Destructive Techniques of Casting-Forming-Welding II

What is the heat generated in eddy current operations?(a) VI(b) VIR(c) I^2RT(d) I^2RThe question was asked in my homework.Question is taken from Eddy Current Test in portion Non Destructive Techniques of Casting-Forming-Welding II

Penetrants of which colour are not used?(a) Red(b) Blue(c) Green(d) YellowThe question was asked in a national level competition.The above asked question is from Dye Penetrant Test topic in division Non Destructive Techniques of Casting-Forming-Welding II

The film produced by an X-ray is called as a radiograph.(a) True(b) FalseI had been asked this question in quiz.My doubt is from Radiography topic in chapter Non Destructive Techniques of Casting-Forming-Welding II

What should the diameter of a Cobalt-60 source used for producing gamma rays?(a) 2 mm(b) 3 mm(c) 4 mm(d) 5 mmThis question was posed to me in an interview.My doubt stems from Radiography topic in section Non Destructive Techniques of Casting-Forming-Welding II

Which of the following is not a type of penetrant application?(a) Dipping(b) Spraying(c) Brushing(d) PouringI have been asked this question during an interview.This intriguing question comes from Dye Penetrant Test in chapter Non Destructive Techniques of Casting-Forming-Welding II

What is the amount of time taken for blotting?(a) 5 minutes(b) 10 minutes(c) 15 minutes(d) 20 minutesThe question was posed to me in a job interview.My question comes from Dye Penetrant Test topic in chapter Non Destructive Techniques of Casting-Forming-Welding II

Ultrasonic testing is a low sensitivity testing method.(a) True(b) FalseI have been asked this question during an online interview.This intriguing question originated from Ultrasonic Inspection topic in section Non Destructive Techniques of Casting-Forming-Welding II

X-rays are useful in detecting defects in casts up to what thickness?(a) 60 mm(b) 61 mm(c) 62 mm(d) 63 mmI have been asked this question during an online exam.This is a very interesting question from Radiography in division Non Destructive Techniques of Casting-Forming-Welding II

What is the lower range of wavelength of the X-rays?(a) 40 x 10^-7 cm(b) 40 x 10^-8 cm(c) 40 x 10^-9 cm(d) 40 x 10^-10 cmThis question was addressed to me during an online interview.My query is from Radiography topic in section Non Destructive Techniques of Casting-Forming-Welding II

Eddy current inspection method cannot be detect which of the following defect?(a) Laps(b) Seams(c) Voids(d) Surface crackThe question was asked during an online exam.The query is from Eddy Current Test in portion Non Destructive Techniques of Casting-Forming-Welding II

Magnetic field lines travel from north to south.(a) True(b) FalseThe question was asked during an online interview.This question is from Magnaflux Test in portion Non Destructive Techniques of Casting-Forming-Welding II

What is the skin depth of copper at 60 Hz frequency?(a) 8 mm(b) 8.5 mm(c) 9 mm(d) 9.5 mmThis question was addressed to me during an interview for a job.This intriguing question originated from Magnaflux Test topic in section Non Destructive Techniques of Casting-Forming-Welding II

On what voltage do the X-rays operate?(a) 350 kV(b) 375 kV(c) 400 kV(d) 475 kVThe question was posed to me in an interview.This interesting question is from Radiography in division Non Destructive Techniques of Casting-Forming-Welding II

Which current is helpful in detecting surface breaking indication?(a) High frequency AC(b) Low frequency AC(c) Full wave DC(d) Half wave DCI had been asked this question in class test.This key question is from Magnaflux Test topic in portion Non Destructive Techniques of Casting-Forming-Welding II

For how long is a penetrant allowed to soak in cracks?(a) 5 to 15 minutes(b) 10 to 30 minutes(c) 15 to 35 minutes(d) 20 to 40 minutesI have been asked this question in my homework.Question is taken from Dye Penetrant Test in division Non Destructive Techniques of Casting-Forming-Welding II

Eddy current testing does not work below what thickness of materials?(a) 0.1 mm(b) 0.2 mm(c) 0.3 mm(d) 0.4 mmThe question was asked during an interview.This is a very interesting question from Eddy Current Test topic in portion Non Destructive Techniques of Casting-Forming-Welding II

For what thickness of a material, do the X-rays give the best results?(a) 50 mm(b) 55 mm(c) 60 mm(d) 65 mmI got this question in an interview for internship.I want to ask this question from Radiography in division Non Destructive Techniques of Casting-Forming-Welding II

Which of the following materials can be tested using magnetic particle testing?(a) Brass(b) Steel(c) Bronze(d) SolderThe question was asked in class test.This intriguing question comes from Magnaflux Test topic in division Non Destructive Techniques of Casting-Forming-Welding II

Which of the following is not a method of pre-cleaning?(a) Solvent(b) Acid blasting(c) Vapour degreasing(d) Media blastingI got this question during a job interview.My question is taken from Dye Penetrant Test in portion Non Destructive Techniques of Casting-Forming-Welding II

Which current is helpful in detecting sub surface discontinuities?(a) High frequency AC(b) Low frequency AC(c) Full wave DC(d) Half wave DCThe question was asked in exam.This is a very interesting question from Magnaflux Test in division Non Destructive Techniques of Casting-Forming-Welding II

Which of the following can be a wavelength of gamma ray?(a) 2 x 10^-8 cm(b) 3 x 10^-8 cm(c) 4 x 10^-8 cm(d) 5 x 10^-8 cmI had been asked this question in an interview.This key question is from Radiography topic in division Non Destructive Techniques of Casting-Forming-Welding II

When an AC current is used for magnaflux test, what is its frequency?(a) 35 cycles/sec(b) 45 cycles/sec(c) 55 cycles/sec(d) 65 cycles/secI have been asked this question in class test.Origin of the question is Magnaflux Test topic in chapter Non Destructive Techniques of Casting-Forming-Welding II

Which of the following is not a source of production for gamma rays?(a) Cobalt-60(b) Iridium-192(c) Caesium-167(d) Americium-241The question was asked in final exam.The query is from Radiography topic in portion Non Destructive Techniques of Casting-Forming-Welding II

Only ultraviolet light is used in dye penetrant test.(a) True(b) FalseI have been asked this question in a national level competition.My doubt is from Dye Penetrant Test in division Non Destructive Techniques of Casting-Forming-Welding II