InterviewSolution

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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

51.	Aluminum has high conductivity than Copper.(a) true(b) falseI got this question during an online exam.The above asked question is from Electrical Conducting Materials in division Electrical Engineering Materials of Design of Electrical Machines
Answer» CORRECT CHOICE is (B) false The best I can explain: Copper has high conductivity than ALUMINUM. The conductivity of Copper is 58.1410^6 s/m and the conductivity of aluminum is 37.210^6 s/m.

52.	How should the conducting materials be in terms of malleability and ductility?(a) highly malleable, less ductile(b) less malleable, less ductile(c) highly malleable, highly ductile(d) less malleable, highly ductileThe question was asked during an internship interview.My enquiry is from Electrical Conducting Materials in portion Electrical Engineering Materials of Design of Electrical Machines
Answer» Correct ANSWER is (c) highly malleable, highly ductile For EXPLANATION I would SAY: The materials, having HIGH malleability allow smooth conduction in TRANSMISSION and distribution. The materials having high ductility help in producing wires flexibly for conduction.

53.	What are the conditions of the conducting materials with respect to melting point and resistance to corrosion?(a) high melting point, low resistance to corrosion(b) low melting point, low resistance to corrosion(c) high melting point, high resistance to corrosion(d) low melting point, high resistance to corrosionThe question was asked during an interview.This key question is from Electrical Conducting Materials topic in portion Electrical Engineering Materials of Design of Electrical Machines
Answer» Right option is (C) high melting point, high resistance to corrosion The BEST explanation: High melting point, ALLOWS the materials to withstand low temperatures.High resistance to corrosion allows the MATERIAL to avoid corrosion, to conduct EFFECTIVELY.

54.	What materials are used as conductors in the Transmission and Distribution sector?(a) copper(b) silver(c) tungsten(d) carbonI got this question in examination.I'm obligated to ask this question of Electrical Conducting Materials topic in chapter Electrical Engineering Materials of Design of Electrical Machines
Answer» RIGHT option is (a) COPPER Best explanation: CONDUCTORS in power SYSTEM require less resistivity, highly malleable, highly ductile and less COST. Silver has all the above properties, but it is highly costly. So that makes copper highly suitable.

55.	What are the properties of Conducting Materials with respect to temperature coefficient of resistance and tensile strength?(a) low temperature coefficient, low tensile strength(b) low temperature coefficient, high tensile strength(c) high temperature coefficient, low tensile strength(d) high temperature coefficient, high tensile strengthThis question was posed to me during an interview.I'm obligated to ask this question of Electrical Conducting Materials in portion Electrical Engineering Materials of Design of Electrical Machines
Answer» Correct choice is (b) low TEMPERATURE coefficient, high tensile strength The EXPLANATION is: The resistance of the material should not increase with temperature rise. This can LEAD to the loss of conduction property. High tensile strength allows in withstanding external disturbances, for SMOOTH functioning.

56.	High resistivity material used in making the filaments of incandescent lamps.(a) true(b) falseThe question was asked in exam.The question is from Electrical Conducting Materials topic in portion Electrical Engineering Materials of Design of Electrical Machines
Answer» Correct CHOICE is (a) true Explanation: It is because to protect the lamps from getting over-heated. If the FILAMENTS get over-heated, it can LEAD to the bursting of the lamps.

57.	Example of high resistivity material is ________________(a) copper(b) gold(c) aluminum(d) carbonI got this question in an interview for job.This question is from Electrical Conducting Materials in section Electrical Engineering Materials of Design of Electrical Machines
Answer» The CORRECT answer is (d) CARBON Easy explanation: Carbon is the highly resistivity MATERIAL of all the materials. Whereas the other 3 materials are associated with LOW resistivity property in nature.

58.	Example of low resistivity material is _____________(a) silver(b) manganese(c) magnesium(d) tungstenThis question was addressed to me during an interview.My question comes from Electrical Conducting Materials topic in division Electrical Engineering Materials of Design of Electrical Machines
Answer» Right OPTION is (a) silver To elaborate: Silver is the low resistivity MATERIAL of all given MATERIALS. Tungsten is a part of HIGH resistivity materials. The other two materials do not have a FIXED resistivity and they vary with temperature.

59.	What is the basic property of electrical conducting materials?(a) allows the passage of current through the materials(b) blocks the passage of current through the materials(c) leaks the current through the materials(d) reverses the direction of current in the materialsI have been asked this question in an interview.My question is from Electrical Conducting Materials in chapter Electrical Engineering Materials of Design of Electrical Machines
Answer» Right option is (a) allows the passage of current through the MATERIALS Easy explanation: The basic property of conducting materials is to allow the FLOW of charges, and align them in a particular DIRECTION. The process is NOTHING but the flow of current in the materials.

60.	What is the correct classification of the conducting materials?(a) low resistivity, low conductivity(b) low resistivity, high conductivity(c) high resistivity, high conductivity(d) medium resistivity, medium conductivityThis question was posed to me during an online exam.This question is from Electrical Conducting Materials topic in chapter Electrical Engineering Materials of Design of Electrical Machines
Answer» The correct answer is (B) low resistivity, high CONDUCTIVITY For EXPLANATION I would say: Resistivity is inversely proportional to the conductivity. So, if the material CONSISTS of high resistivity then it will obviously have low conductivity and vice versa.