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Engineering Trivia Questions for College Students — page 3

162 trivia questions with answers, college. Multiple-choice trivia with answers, sorted by topic and level. Reveal the answers below, pick one at random, or present them full-screen.

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  1. 101.

    Stability of a transmission line can be increased by

    • Aboth A and B
    • Bshunt reactor
    • Cshunt capacitor
    • Dseries capacitor
    Answer: both A and B
  2. 102.

    The output of the system has an effect upon the input quantity, then the system is a

    • Aclosed loop control system.
    • Bopen loop control system.
    • Cnone of the above.
    • Deither A or B.
    Answer: closed loop control system.
  3. 103.

    Low frequency supply is necessary for direct core type induction furnaces because

    • AWith normal frequeny supply the electromagnetic forces causes severe stirring action in the molten metal.
    • BNone of the above.
    • CBoth A and B.
    • DMagnetic coupling between the primary and secondary circuit is poor.
    Answer: Both A and B.
  4. 104.

    Which one of the following is not a vectored interrupt?

    • AINTR.
    • BTRAP.
    • CRST 6.5.
    • DRST 7.5.
    Answer: INTR.
  5. 105.

    If all the elements in a particular network are linear, then the superposition theorem would hold, when the excitation is

    • AEither AC or DC
    • BDC only
    • CAC only
    • DAn Impulse
    Answer: Either AC or DC
  6. 106.

    If a Hexadecimal number needs to convert to binary. For each hexadecimal digit, there will be how many bits

    • A8
    • B4
    • C2
    • D1
    Answer: 4
  7. 107.

    When checked with an ohm meter an open resistor reads

    • Alow but not zero.
    • Binfinite.
    • Chigh but within tolerance.
    • Dzero.
    Answer: infinite.
  8. 108.

    In AC circuits, the connection of measuring instruments cause loading effect errors which may effect

    • Aboth of above.
    • Bonly the magnitude of the quantity being measured.
    • Cmagnitude, phase and waveform of the quantity being measured.
    • Donly phase of the quantity being measured.
    Answer: magnitude, phase and waveform of the quantity being measured.
  9. 109.

    Electric drive is becoming more and more popular because

    • Ait is simple and reliable.
    • Bit provide smooth and easy control.
    • Call of below.
    • Dit is cheaper in cost.
    Answer: all of below.
  10. 110.

    The illumination at a point 5 meters below a lamp in 6 lux. The candle power of the lamp is

    • A140.
    • B150.
    • C30
    • D200.
    Answer: 150.
  11. 111.

    A combinational PLD with a programmable AND array and a fixed OR array is called a

    • APAL
    • BPLA
    • CPROM
    • DPLD
    Answer: PAL
  12. 112.

    Instantaneous power in inductor is proportional to the

    • Asquare of the rate of change of current.
    • Bsquare of instantaneous current.
    • Cproduct of the instantaneous current and rate of change of current.
    • Dtemperature of the inductor.
    Answer: product of the instantaneous current and rate of change of current.
  13. 113.

    Both the ALU and control section of CPU employ which special purpose storage location?

    • AAccumulators
    • BBuffers
    • CRegisters
    • DDecoders
    Answer: Accumulators
  14. 114.

    The ROM programmed during manufacturing process itself is called

    • AEEPROM
    • BPROM
    • CMROM
    • DEPROM
    Answer: MROM
  15. 115.

    How many entries will be in the truth table of a 3 input NAND gate ?

    • A3
    • B6
    • C8
    • D9
    Answer: 8
  16. 116.

    Electrical analogous quantity for spring element (K) in force-voltage analogy is

    • A1/C
    • BC
    • CR
    • DL
    Answer: 1/C
  17. 117.

    Two infinite parallel metal plates are charged with equal surface charge density of the same polarity. The electric field in the gap between the plates is

    • Adependent on coordinates of field points.
    • Bsame as that produced by one plate.
    • Cdouble the field produced by one plate.
    • Dzero.
    Answer: zero.
  18. 118.

    Which system is also known as automatic control system?

    • AOpen loop control system
    • BClosed loop control system
    • CEither A or B
    • DNether A nor B
    Answer: Closed loop control system
  19. 119.

    Systematic errors are

    • Aall of the above.
    • Benvironmental errors.
    • Cobservational errors.
    • Dinstrument errors.
    Answer: all of the above.
  20. 120.

    Which number system has a base of 16

    • AHexadecimal
    • BNone
    • COctal
    • DDecimal
    Answer: Hexadecimal
  21. 121.

    In the toggle mode a JK flip-flop has

    • AJ = 1, K = 0.
    • BJ = 0, K = 0.
    • CJ = 1, K = 1.
    • DJ = 0, K = 1.
    Answer: J = 1, K = 1.
  22. 122.

    What will be the total flux emitted by a source of 60 candle power?

    • A754.2 lumens.
    • B60 lumens.
    • CNone of these.
    • D0.001326 lumens.
    Answer: 754.2 lumens.
  23. 123.

    A motor has a thermal heating time constant of 50 mm. When the motor runs continuous of full scale, its final temperature rise is 80° C, what would be the temperature rise after 1 hour, if the motor runs continuously on full load?

    • A56° C.
    • B58° C.
    • C55.9° C.
    • D60° C.
    Answer: 55.9° C.
  24. 124.

    Which of the following windings are necessary in case of all dc machines?

    • Aopen type winding
    • Blap winding
    • Cclosed winding
    • Dwave winding
    Answer: closed winding
  25. 125.

    A quartz crystal oscillator consists of

    • Aneither series nor parallel frequency.
    • Bonly parallel resonant frequency.
    • Cboth series and parallel frequencies.
    • Donly series resonant frequency.
    Answer: both series and parallel frequencies.
  26. 126.

    Thin laminations are used in a machine in order to reduce

    • ACopper losses
    • BEddy current losses
    • CBoth A and B
    • DHysteresis losses
    Answer: Eddy current losses
  27. 127.

    The magnetisation and applied field in ferromagnetic materials are related

    • Anon linearly.
    • Bsinusoidally.
    • Cparabolically.
    • Dlinearly.
    Answer: non linearly.
  28. 128.

    A metal surface with 1 meter radius and surface charge density of 20 coulombs / m2 is enclosed in a 10 m side cube. The total outward electric displacement normal to the surface of the cube is

    • A10π coulombs.
    • Bnone of these.
    • C40π coulombs.
    • D80π coulombs.
    Answer: 80π coulombs.
  29. 129.

    Which of the following is/are the disadvantages of an open loop control system?

    • AUnreliable.
    • Bboth A and B.
    • CInaccurate.
    • Dnone of the above.
    Answer: both A and B.
  30. 130.

    Electrical analogous quantity for dash-pot in force-current analogy is

    • Acapacitance.
    • Bresistance.
    • Cconductance.
    • Dinductance.
    Answer: conductance.
  31. 131.

    Inintel 8085A microprocessor ALE signal is made high to

    • ATo disable data bus
    • BEnable the data bus to be used as low order address bus
    • CTo latch data D0-D7 from data bus
    • DTo achieve all the functions listed above
    Answer: Enable the data bus to be used as low order address bus
  32. 132.

    Speed control by variation of field flux results in

    • Aconstant power drive.
    • Bconstant torque drive.
    • Cvariable power drive.
    • Dnone of the above.
    Answer: constant power drive.
  33. 133.

    Which oscillators are easy to fabricate in a monolithic IC?

    • AHartley oscillator.
    • BWien bridge oscillator.
    • CCrystal oscillator.
    • DRelaxation oscillator.
    Answer: Relaxation oscillator.
  34. 134.

    Purely mechanical instrument cannot be used for dynamic measurements because they have

    • Ahigher response time.
    • Blarge time constant.
    • Call of the above.
    • Dhigh inertia.
    Answer: all of the above.
  35. 135.

    Stack is also known as

    • ALIFO memory
    • BFIFO memory
    • CLILO memory
    • DFlash memory
    Answer: LIFO memory
  36. 136.

    Deflection method direct measurements are most widely used as these are

    • Aleast time consuming.
    • Bmost simple.
    • Cmost accurate.
    • Dmost simple and least time consuming.
    Answer: most simple and least time consuming.
  37. 137.

    In Digital Logic Designs, GAL is abbreviated as

    • AGeneric Array Logic
    • BGeneral Advance Logic
    • CGeneric Advance Logic
    • DGeneral Array Logic
    Answer: Generic Array Logic
  38. 138.

    What will be the number of lamps, each having 300 lumens, required to obtain an average illuminance of 50 lux on a 4m * 3m rectangular room?

    • A5
    • B4
    • C2
    • D6
    Answer: 2
  39. 139.

    Which of the following is/are the advantages of a closed loop control system?

    • Aboth A and B.
    • BThe closed loop systems are less affected by noise.
    • CThe closed loop systems are accurate.
    • Dnether A nor B.
    Answer: both A and B.
  40. 140.

    What is used to protect the SCR from over current ?

    • ACB and fuse.
    • BSnubber circuit.
    • CHeat sink.
    • DVoltage clamping device.
    Answer: CB and fuse.
  41. 141.

    For intermittent work which of the following furnace is suitable?

    • AIndirect arc furnace.
    • BCore less furnace.
    • CNither of above.
    • DEither of above.
    Answer: Indirect arc furnace.
  42. 142.

    Four identical alternators each are rated for 20 MVA, 11 KV having a subtransient reactance of 16% are working in parallel. The short circuit level at the busbar is

    • A100 MVA
    • B400 MVA
    • C500 MVA
    • D125 MVA
    Answer: 500 MVA
  43. 143.

    For an SCR gate cathode characteristic is a straight line of 130. For triggered source volume of 15 V and allowable gate power dissipation of 0.5 W compute the gate source resistance?

    • A111.9 ohm
    • B108 ohm
    • C11.19 ohm
    • D115 ohm
    Answer: 111.9 ohm
  44. 144.

    The concept of V/f control of inverters driving induction motors resuls in

    • Ahormonic elimination
    • Bspeed reversal
    • Creduced magnetic loss
    • Dconstant torque operation
    Answer: constant torque operation
  45. 145.

    In electrical resistance welding material of electrode should have

    • Aall of above.
    • Bhigher thermal conductivities.
    • Chigher electrical conductivities.
    • Dsufficient strength to sustain high pressure at elevated temperatures.
    Answer: all of above.
  46. 146.

    A combinational PLD with a fixed AND array and a programmable OR array is called a

    • APLD
    • BPAL
    • CPLA
    • DPROM
    Answer: PROM
  47. 147.

    Commutator in DC generator is used for

    • Acollecting of current
    • Bincrease efficiency
    • Creduce losses
    • Dconvert AC armature current in to DC
    Answer: convert AC armature current in to DC
  48. 148.

    Which lamp has the best Colour Rendering Index (CRI)?

    • AFluorescent
    • BHigh pressure sodium vapour
    • CIncandescent
    • DLED
    Answer: Incandescent
  49. 149.

    A 0 - 100 V voltmeter has a guaranteed accuracy of 2 % of full scale reading. The voltage measured by the voltmeter is 75 V. The limiting error is in percentage

    • A1 %.
    • B2 %.
    • C2.66 %.
    • D3.33 %.
    Answer: 2.66 %.
  50. 150.

    Length of the cable is doubled, its capacitance C will be

    • Adoubled.
    • Bone-fourth.
    • Cunchanged.
    • Done-half.
    Answer: doubled.

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Questions adapted from MMLU (Hendrycks et al.) (MIT), edited for clarity. This collection may be reused under the same terms — see sources & licenses.