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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A sum was put at simple interest at a certain rate for 3 years. Had it been put at 2% higher rate, it would have fetched Rs. 360 more. Find the sum. |
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Answer» Let sum = P and original rate = R. Then, [ (P*(R+2)*3)/100] – [ (P*R*3)/100] = 360. 3PR + 6P - 3PR = 36000 6P=36000 P=6000 Hence, sum = Rs. 6000. |
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| 2. |
If the depletion layer gets wider, the capacitance a. Decreases b. Stays the same c. Increases d. Is variable |
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Answer» (a) Decreases |
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| 3. |
The simple interest on a sum of money is 4/9 of the principal .Find the rate percent and time, if both are numerically equal. |
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Answer» Let sum = Rs. x. Then, S.I. = Rs. 4x/9 Let rate = R% and time = R years. Then, (x*R*R)/100=4x/9 or R2 =400/9 or R = 20/3 = 6 2/3. Rate = 6 2/3 % and Time = 6 2/3 years = 6 years 8 months. |
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| 4. |
The device associated with voltage-controlled capacitance is a a. Light-emitting diode b. Photodiode c. Varactor diode d. Zener diode |
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Answer» (c) Varactor diode |
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| 5. |
The simple interest on a certain sum of money for 2 1/2 years at 12% per annum is Rs. 40 less than the simple interest on the same sum for 3 ½ years at 10% per annum. Find the sum. |
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Answer» Let the sum be Rs. x Then, ((x*10*7)/(100*2)) – ( (x*12*5)/(100*2)) = 40 (7x/20)-(3x/10)=40 x = (40 * 20) = 800. Hence, the sum is Rs. 800. |
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| 6. |
J alone can do a piece of work in 7.5 days. K and L together can complete the same work in 5 days. In how many days will J, K and L together complete the same work?1. 5 days2. 3 days3. 4.5 days4. 6 days |
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Answer» Correct Answer - Option 2 : 3 days Given: J can complete the work in 7.5 days K and L can complete the work in 5 days, working together Formula used: The efficiency of a person is equal to its time taken Calculation: Per day efficiency of J = 1/7.5 = 2/15 Per day efficiency of K and L, working together = 1/5 Per day efficiency of J, K and L working together = \(\dfrac{2}{15} + \dfrac{1}{5} = \dfrac{1}{3}\) ∴ Together, they will take 3 days. |
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| 7. |
Photodiode is a deviceA. which is always operated in reverse biasB. which is always operated in forward biasC. in which photo current is independent of intersity of incident radiationD. which may be operated in forward or reverse bias |
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Answer» Correct Answer - A Photodiode is a device always operated in reverse bias. |
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| 8. |
You step into an elevator, and it accelerates to a downward speed of 9.2 m/s in 2.1 s. How does your apparent weight during this acceleration compare with your actual weight? Apparent weight isA. 55% of actualB. 155% of actualC. 100% of actualD. 30% of actual |
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Answer» `a=(v)/(t)` `x=(m(g-a))/(mg)xx100` |
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| 9. |
Among the following the number of state variable is _____. Internal energy (U) Volume (V) Heat (q) Enthalpy (H) |
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Answer» Correct answer is 3 Internal energy, volume enthalpy are state variable |
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| 10. |
Assertion: Boron is unable to form [BF6]3-Reason: Boron has small size.(1) Assertion is true, Reason is true and Reason is correct explanation of Assertion(2) Assertion is true, Reason is true and Reason is not correct explanation of Assertion.(3) Assertion is true and Reason is false(4) Assertion is false and Reason is true |
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Answer» Correct option is (2) Assertion is true, Reason is true and Reason is not correct explanation of Assertion. Boron do not form [BF6]3-. Since Boron does not have vacant d orbitals it can not expand octet. |
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| 11. |
The group I element A having highest hydration enthalpy has similar properties of group II element B, then element B is :(1) Mg(2) Be(3) Ca(4) Sr |
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Answer» Correct option is (1) Mg In group I Li has highest hydration enthalpy which has diagonal relationship with group II element Mg. |
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| 12. |
The critical angle for a medium is `60^(@)` . The refractive index of the medium isA. `(1)/(sqrt3)`B. `sqrt((3)/(2))`C. 1D. `sqrt3` |
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Answer» Correct Answer - D `mu= tan theta_(p) ` `= tan 60` `=sqrt3` |
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| 13. |
why does hydration enthalpy decrease going down the group of s block elements? |
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Answer» Smaller the ion, the higher the hydration enthalpy will be because smaller atoms can accommodate a large number of water molecules around it and get hydrated. Hydration enthalpy decreases down the group the size of the atom increases due to the addition of extra valence shells. |
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| 14. |
विद्युत फ्लक्स सम्बन्धी गॉस का नियम लिखिए एवं सिद्ध कीजिये का नियम ज्ञात कीजिये। |
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Answer» किसी बंद पृष्ठ से गुजरने वाला कुल विद्युत फ्लक्स उस पृष्ठ पर उपस्थित कुल आवेश q का 1/Ԑ0 गुना होता है। इसे ही गॉस की प्रमेय कहते हैं। |
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| 15. |
Blocks of 1,0,2,0 and 3.0 kg are lined up on a table, as shown in fig. A righward-pointing 12N force is applied to the left most block. What force does the middle block exert on the right most one. A. 6NB. 10NC. 12ND. 8N |
| Answer» Required N`=3xxa=3xx13//6` | |
| 16. |
A charged particle of mass m = 2 kg and charge `1 muC` is projected from a horizontal ground at an angle `theta=45^@` with speed `10ms^(-1)`. In space, a horizontal electric field towards the direction of projection `E = 2 xx 10^(7) NC^(-1)` exists. The range of the projectile isA. 20 mB. 60 mC. 200 mD. 180 m |
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Answer» Correct Answer - A `a_(x)=(qE)/(m)=(10^(-4)xx2xx10^(7))/(2)=10ms^(-2)` Tune of flight `=(2usintheta)/(g)=(2xx10xx(1)/(sqrt(2)))/(10)=sqrt(2)s` Hence `R=u_(x)T+(1)/(2)a_(x)T^(2)` `=10cos45^(@)xxT+(1)/(2)a_(x)T^(2)` `=(10)/(sqrt(2))xxsqrt(2)+(1)/(2)xx10xx2` `=20m`. |
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| 17. |
A particle is projected with `10ms^(-1)` at angle `theta` above horizontal from a horizontal ground. Find the value of `theta` so that area under the parabolic path of the projectile will be maximum `(g=10ms^(-2))`.A. `60^(@)`B. `45^(@)`C. `90^(@)`D. None of these |
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Answer» `A=int y dx=int_(0)^(R)tan theta(x-(x^(2))/(R))dx` `=tan theta((R^(2))/(2)-(R^(3))/(3R))` `(dA)/(dtheta)=0=2 sin^(2)thetacos^(2)theta-sin^(3)thetasintheta=0` `=tan theta(R^(2))/(6)=(tantheta)/(6)((u^(2)sin theta cos theta)/(g))^(2)` `sin^(2)theta(3 cos^(2)theta-sin^(2)theta)=0` `=(10^(4)xxu^(2))/(36xx10xx10cos theta)sin^(2)thetacos^(2)theta` `3=tan^(2)theta` `=(200)/(3)sin^(3)theta cos theta` `tan theta=sqrt(3)` `theta=60^(@)` |
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| 18. |
चुम्बक संबंधी गास नियम लिखिये। |
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Answer» चुम्बक में दो ध्रुव पाए जाते है तथा इन दोनों ध्रुवों को अलग नहीं किया जा सकता अर्थात किसी एक ध्रुव का अस्तित्व संभव नहीं है तथा धारावाही लूप या चुम्बकीय द्विध्रुव को चुम्बकत्व का सबसे छोटा रूप माना जाता है यही कारण है की चुंबकीय क्षेत्र रेखाएं सतत तथा बंद वक्र के रूप में होती है। |
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| 19. |
It is a refrigeration tool used to expand the inner diameter of a copper tube (a) Tube cutter (b) Flaring tool (c) Allen wrench (d) Swaging tool |
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Answer» (d) Swaging tool Swaging tool is a refrigeration tool used to expand the inner diameter of a copper tube. |
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| 20. |
Which tools can students use to measure the height of the concrete floor? (a) Plumb bob (b) Spirit level (c) Thermometer (d) Meter tape |
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Answer» Correct answer is (d) Meter tape |
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| 21. |
The number of isosceles Deltas with integer sides if no side exeeds 2016 isA. `(1008)^(2)` if equal sides do not exceed `1008`B. `2(1008)^(2)` if equal sides exceed `1008`C. `3(1008)^(2)` if equal side have any length exceeding 2016D. `(2016)^(2)` if equal sides have any length not exceeding 2016 |
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Answer» Correct Answer - A::B::C::D If equal side have length `n`, then the number of triangles will be `2n-1`. So if equal side does not exceed `1008,` no. of triangles `=1+3+5+…1008` terms `=(1008)^(2)` if equal side does exceed `1008`. No of triangles `=2016+2016+2016+…1008` terms `=2(1008)^(2)` |
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| 22. |
Which tool can students use to measure the horizontal level of the concrete floor? (a) Micrometer (b) Spirit level (c) Thermometer (d) Threading gauge |
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Answer» Correct answer is (b) Spirit level |
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| 23. |
The following question is accompanied by three statements (I), (II), and (III). You have to determine which statements(s) is/are sufficient/necessary to answer the questions.What are the marks scored by Ram in Maths?Statement I. Marks scored by Ram in English is more than his marks in Science by 20.Statement II. Total marks scored by Ram in English, Science, and Maths are 197.Statement III. Marks scored by Ram in Science is more than his marks in Maths by 12.1. Either statement I and II together or Statement II and III together is sufficient to answer the question.2. The data in statement I alone is sufficient to answer the question.3. The data in statement I and II together are sufficient to answer the question.4. The data in all the statements I, II, and III are not sufficient to answer the question.5. The data in all statements I, II, and III together are necessary to answer the question. |
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Answer» Correct Answer - Option 5 : The data in all statements I, II, and III together are necessary to answer the question. Calculation: For Statement I and III: Let the marks in Maths = x Marks in science = x + 12 Marks is English = x + 32 For statement III: ⇒ Maths + Science + English = 197 ⇒ x + x + 12 + x + 32 = 197 ⇒ 3x + 44 = 197 ⇒ 3x = 197 – 44 ⇒ 3x = 153 ⇒ x = 51 ∴ marks in Maths is 51 All the Statements together are sufficient. |
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| 24. |
The following question is accompanied by three statements (I), (II), and (III). You have to determine which statements(s) is/are sufficient/necessary to answer the questions.In a Kilometer race, by how many meters Raju beats Shaju?Statement I. In a kilometer race, Raju beats Laiju by 200 meters.Statement II. The ratio of the speed of Laiju and Shaju is 4 : 3.Statement III. In a kilometer race, Laiju beats Shaju by 300 meters.1. Either statement I and III together or Statements I and II together is sufficient to answer the question.2. The data in statement I alone or statements II and II together is sufficient to answer the question.3. The data in statement I and II together are sufficient to answer the question.4. The data in all the statements I, II, and III are not sufficient to answer the question.5. The data in all statements I, II, and III together are necessary to answer the question. |
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Answer» Correct Answer - Option 1 : Either statement I and III together or Statements I and II together is sufficient to answer the question. Calculation: For Statement I and III: We can conclude our answer to 500 meters. For statement II: The only ratio is given therefore can’t find anything. For statement I and II: We can find the answer as we have the ratio and the distance. Statement I and III together or Statement I and II together are sufficient. |
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| 25. |
At the same rat of simple interest in present per annum, if a principle becosmes the amount of ₹ 7400 in 8 years and of ₹ 6200 in 4 years, then determine the principal and rate of simple intest in percent per annum. |
| Answer» Principal = ₹ 5000, rate of interest = 6% | |
| 26. |
This type of compressor is used in refrigerators of our homes (a) Semi-hermetically sealed compressor (b) Hermetically sealed compressor (c) Open type compressor (d) None of the above |
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Answer» (b) Hermetically sealed compressor Hermetically sealed compressor is used in refrigerators of our homes. |
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| 27. |
Narayan, standing in the midst of a field, observes a flying bird in his north at an angle of elevation of `30^@` and aft er 21 minutes he observes the bird in his south at an angle of elevation of `60^@`. If the bird flies in a s traight line all a height of `50sqrt3` metres, then find its speed in metre per minuts. |
| Answer» 100 metres per minute | |
| 28. |
Batholith is a type of:1. ocean current2. secondary pollutant3. valley4. igneous rock |
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Answer» Correct Answer - Option 4 : igneous rock The correct answer is igneous rock.
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| 29. |
In a hermetically sealed compressor unit, the motor remains _________ the shell (a) Inside (b) Outside (c) May be inside or outside (d) None of the above |
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Answer» (a) Inside In a hermetically sealed compressor unit, the motor remains Inside the shell. |
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| 30. |
The value of c, is?(a) 2(b) 4(c) 6(d) 8 |
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Answer» The correct choice is (a) 2 The explanation is: Balance N, O and H. |
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| 31. |
What is the product stream of H2O?(a) 2.5(b) 3.5(c) 7.5(d) 10.5 |
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Answer» Correct option is (c) 7.5 To explain I would say: Mass fraction will be constant for product stream as well. |
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| 32. |
What is the mass fraction of H2O in A?(a) 0.2(b) 0.4(c) 0.6(d) 0.8 |
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Answer» Correct choice is (a) 0.2 The explanation: ΣωI = 1 and ΣωIWi = 0 for each component. |
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| 33. |
The tool used to cut wood is known as ______(a) C- Clamp(b) T - Square(c) Saw(d) Trowel |
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Answer» Correct answer is (c) Saw |
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| 34. |
________ dimensions are those that can be developed in terms of fundamental dimensions.(a) Fundamental(b) Derived(c) Unit(d) None of the mentioned |
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Answer» Right choice is (b) Derived The explanation: Derived dimensions are those that can be developed in terms of fundamental dimensions. |
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| 35. |
P-H chart means (a) Pressure – Heat chart (b) Performance – Enthalpy chart (c) Pressure- Enthalpy chart (d) Performance- Heat chart |
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Answer» (c) Pressure- Enthalpy chart P-H chart means Pressure- Enthalpy chart. |
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| 36. |
What is Bench Vice? (a) Used to hold the job firmly during filing, cutting, chiseling. (b) Drilling tool (c) Used for pressing the job. (d) Measuring tool |
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Answer» Correct answer is (a) Used to hold the job firmly during filing, cutting, chiseling. |
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| 37. |
_________ are the general expression of a characteristics of measurement.(a) Units(b) Dimensions(c) Neither unit nor dimension(d) None of the mentioned |
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Answer» The correct option is (b) Dimensions The best I can explain: Dimensions are the general expression of a characteristics of measurement. |
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| 38. |
The component of a Refrigeration system which pumps the refrigerant into the system and circulates it again and again in cycles (a) Evaporator (b) Receiver (c) Condenser (d) Compressor |
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Answer» (d) Compressor The component of a Refrigeration system Compressor pumps the refrigerant into the system and circulates it again and again in cycles. |
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| 39. |
___________ are the means of explicitly expressing the dimensions.(a) Units(b) Dimensions(c) Significant figures(d) None of the mentioned |
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Answer» Right choice is (a) Units To elaborate: Units are the means of explicitly expressing the dimensions. |
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| 40. |
What is the unit of A?(a) atm(b) K(c) 1/atm(d) 1/K |
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Answer» The correct answer is (a) atm The explanation: The unit of A is same as the unit of pressure. |
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| 41. |
What do you mean by soldering? (a) To hold and cut the wooden job. (b) The process of joining by metals having lower melting point than that of metal sheet. (c) The process of joining by non-metal parts having lower melting point of nonmetal sheet. (d) Process of joining of a wooden and metal part. |
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Answer» (b) The process of joining by metals having lower melting point than that of metal sheet. |
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| 42. |
Any arbitrary portion of or whole process that is considered for analysis is called(a) System(b) Boundary(c) Surrounding(d) None of the mentioned |
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Answer» The correct choice is (a) System To explain I would say: Any arbitrary portion of or whole process that is considered for analysis is called system. |
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| 43. |
Which one is not a dimension?(a) Length(b) Mass(c) Time(d) Kelvin |
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Answer» Right choice is (d) Kelvin The best explanation: Kelvin is a unit, not dimension. |
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| 44. |
Internal energy is the function of(a) Temperature and Pressure(b) Temperature and Volume(c) Pressure and Volume(d) None of the mentioned |
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Answer» The correct option is (b) Temperature and Volume For explanation I would say: U = f(T,V). |
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| 45. |
The first electrical air conditioning was invented by (a) M. Faraday (b) Willis Haviland Carrier (c) Thomas Edison (d) Isaac Newton |
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Answer» (b) Willis Haviland Carrier The first electrical air conditioning was invented by Willis Haviland Carrier. |
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| 46. |
Find out the dimensionless quantity(a) Pressure(b) Reynolds number(c) Viscosity(d) Density |
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Answer» Right answer is (b) Reynolds number The best I can explain: Reynolds number has no dimension or units. |
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| 47. |
_________ is the line that encloses the portion of the process that you want to analyse.(a) System(b) Surrounding(c) System Boundary(d) None of the mentioned |
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Answer» Correct answer is (c) System Boundary Best explanation: System Boundary is the line that encloses the portion of the process that you want to analyse. |
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| 48. |
Which one is a unit?(a) Feet(b) Second(c) Square meter(d) All of the mentioned |
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Answer» The correct option is (d) All of the mentioned The best I can explain: All are the units of length, time and area respectively. |
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| 49. |
Jule/Kg.Kelvin is a(a) SI unit(b) AE unit(c) Neither SI nor AE unit(d) None of the mentioned |
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Answer» Right choice is (a) SI unit Easiest explanation: Jule/Kg.Kelvin is a SI unit of heat capacity. |
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| 50. |
A collection of variables or parameters that has no net dimensions or units are called(a) Dimensionless group(b) Dimensional group(c) Derived dimension group(d) None of the mentioned |
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Answer» The correct choice is (a) Dimensionless group For explanation I would say: A collection of variables or parameters that has no net dimensions or units are called dimensionless group. |
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