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Engineering Trivia Questions for College Students — page 2

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. 51.

    Which of the following is not a sinusoidal oscillator?

    • ARelaxation oscillator
    • BLC oscillator
    • CRC phase shift oscillator
    • DCrystal oscillator
    Answer: Relaxation oscillator
  2. 52.

    An SCR has half cycle surge current rating of 3000 A for 50 Hz supply. One cycle surge current will be

    • A2121.32 A.
    • B6000 A.
    • C4242.64 A.
    • D1500 A.
    Answer: 2121.32 A.
  3. 53.

    Potentiometer method of DC voltage measurement is more accurate than direct measurement using a voltmeter because

    • AIt loads the circuit moderately.
    • BIt loads the circuit to maximum extent.
    • CIt does not load the circuit at all.
    • DIt uses centre zero galvanometer instead of voltmeter.
    Answer: It does not load the circuit at all.
  4. 54.

    The resistivity of the conductor depends on

    • Anone of these.
    • Blength of the conductor.
    • Carea of the conductor.
    • Dtype of material.
    Answer: type of material.
  5. 55.

    According to the Bohr model, an electron gains or losses energy only by

    • Abeing completely removed from an atom.
    • Bjumping from one atom to another atom.
    • Cjumping from one allowed orbit to another.
    • Dmoving faster or slower in an allowed orbit.
    Answer: jumping from one allowed orbit to another.
  6. 56.

    A three-state buffer has the following output states

    • ASet, Reset, Halt
    • BBoth A and B
    • C1, 0, float
    • DHigh, Low, Float
    Answer: Both A and B
  7. 57.

    In balanced bridge, if the positions of detector and source are interchanged, the bridge will still remain balanced. This can be explained from which theorem

    • AThevinin's theorem
    • BReciprocity theorem
    • CCompensation theorem
    • DNorton's theorem
    Answer: Reciprocity theorem
  8. 58.

    Induction heating takes place in

    • Aconducting but non-magnetic materials.
    • Bconducting materials which may be either magnetic or non-magentic materials.
    • Cconducting and magnetic materials.
    • Dinsulating materials.
    Answer: conducting materials which may be either magnetic or non-magentic materials.
  9. 59.

    A long wire composed of a smooth round conductor runs above and parallel to the ground (assumed to be a large conducting plane). A high voltage exists between the conductor and the ground. The maximum electric stress occurs at

    • Aupper surface of the conductor.
    • Blower surface of the conductor.
    • Cmidway between the conductor and ground.
    • Dthe ground surface.
    Answer: lower surface of the conductor.
  10. 60.

    The feedback factor of a Wien bridge oscillator using Op-Amp is

    • A1/2
    • B1/4
    • C1/3
    • D1
    Answer: 1/2
  11. 61.

    The following are the necessary requirements of an oscillator

    • ABoth A and B
    • BAmplitude stability
    • CPower stability
    • DFrequency stability
    Answer: Both A and B
  12. 62.

    The metal surfaces for electrical resistance welding must be

    • Aclean.
    • Bmoistened
    • Crough.
    • Dcoloured
    Answer: clean.
  13. 63.

    In two wattmeter method of power measurement if the total power is measured by one wattmeter only then power factor of the system is

    • A1.
    • B0.
    • C0.5.
    • Dnone of above.
    Answer: 0.5.
  14. 64.

    What are the sets of commands in a program which are not translated into machine instructions during assembly process, called?

    • AMnemonics
    • BIdentifiers
    • CDirectives
    • DOperands
    Answer: Directives
  15. 65.

    The change of cross sectional area of conductor in magnetic field will affect

    • Anone of above.
    • B(A) and (B) both in the same way.
    • Cresistance of conductor.
    • Dreluctance of conductor.
    Answer: (A) and (B) both in the same way.
  16. 66.

    Susceptibility is negative for

    • Anon magnetic substances.
    • Bferromagnetic substances.
    • Cdiamagnetic substances.
    • Dnone of above.
    Answer: diamagnetic substances.
  17. 67.

    In an SR latch built from NOR gates, which condition is not allowed

    • AS=0, R=1
    • BS=0, R=0
    • CS=1, R=0
    • DS=1, R=1
    Answer: S=1, R=1
  18. 68.

    Materials used in heat sink should have

    • Ahigh melting point.
    • BAll of these.
    • Chigh thermal conductivity.
    • Dlarge surface area.
    Answer: All of these.
  19. 69.

    A digital circuit that can store on bit is a

    • Aflip-flop
    • Bregistor
    • Cgate
    • DXOR gate
    Answer: flip-flop
  20. 70.

    The smallest change in measured variable to which instrument will respond is

    • Aaccuracy.
    • Bsensitivity.
    • Cprecision.
    • Dresolution.
    Answer: resolution.
  21. 71.

    Under over voltage condition impedance offered by the voltage clamping device is

    • Ainfinity.
    • Blow.
    • Cmoderate.
    • Dhigh.
    Answer: low.
  22. 72.

    Relaxation Voltage controlled oscillators are used to generate

    • ABoth B and C
    • BSinusoidal wave
    • CSawtooth wave
    • DTriangular wave
    Answer: Both B and C
  23. 73.

    Snubber circuit is used with SCR

    • Ain series.
    • Banti parallel.
    • Cin parallel.
    • Deither series or parallel.
    Answer: in parallel.
  24. 74.

    Which of the following is used in SCR to protect from high dV / dt?

    • ACircuit breaker.
    • BEqualizing circuit.
    • CSnubber circuit.
    • DFuse.
    Answer: Snubber circuit.
  25. 75.

    Which of the following are the disadvantages of a closed loop control system?

    • AComplex and costly.
    • BOscillatory response.
    • CReduces the overall gain.
    • DAll of the above.
    Answer: All of the above.
  26. 76.

    To obtain a high value of capacitance, the permittivity of dielectric medium should be

    • Alow
    • Bhigh
    • Czero
    • Dunity
    Answer: high
  27. 77.

    The resistance in the circuit of the moving coil of a dynamometer wattmeter should be

    • ALow.
    • BAlmost zero.
    • CVery low.
    • DHigh.
    Answer: High.
  28. 78.

    Lowest critical frequency is due to zero and it may be present at the origin or nearer to the origin, then the type of network is

    • ALC circuit.
    • BRL Circuit.
    • CRLC circuit.
    • DRC circuit.
    Answer: RL Circuit.
  29. 79.

    Which of the following memories uses one transistor and one capacitor as basic memory unit

    • ABoth SRAM and DRAM
    • BSRAM
    • CDRAM
    • DNone
    Answer: DRAM
  30. 80.

    For audio frequency applications, the popular oscillator used is

    • AWien bridge oscillator
    • BPhase shift oscillator
    • CCrystal oscillator
    • DHartley oscillator
    Answer: Wien bridge oscillator
  31. 81.

    A wire carrying current is bent in the form of a circular loop. Then the magnetic field around each portion of the wire will be

    • Aparallel to the plane of the wire.
    • Bparallel to half portion and perpendicular for the other half.
    • Cnone of above.
    • Dperpendicular to the circumference of the wire.
    Answer: parallel to the plane of the wire.
  32. 82.

    A null type instrument as compared to a deflected type instrument has

    • Aa lower sensitivity.
    • Ball of the above.
    • Ca faster response.
    • Da higher accuracy.
    Answer: a higher accuracy.
  33. 83.

    While operating on variable frequency supplies, the AC motor requires variable voltage in order to

    • Aprotect the insulation.
    • Bimprove the capabilities of the inverter.
    • Cprotect thyristor from dV / dt.
    • Davoid effect of saturation.
    Answer: avoid effect of saturation.
  34. 84.

    In a dc machine 6 pole wave winding is used. The number of parallel paths are?

    • A6
    • B1
    • C2
    • D4
    Answer: 2
  35. 85.

    A working diode must have

    • AHigh resistance when forward or reverse biased
    • BLow resistance when forward or reverse biased
    • CHigh resistance when forward biased, while low resistance when reverse bias
    • DLow resistance when forward biased, while high resistance when reverse bias
    Answer: Low resistance when forward biased, while high resistance when reverse bias
  36. 86.

    Which of the followings is/are active element?

    • ANone of these.
    • BCurrent source
    • CBoth
    • DVoltage source
    Answer: Both
  37. 87.

    Which of the following is a digital device

    • AMicrophone
    • BLight switch
    • CRegulator of a fan
    • DResistance of a material
    Answer: Light switch
  38. 88.

    The coil of a moving coil meter has 100 turns, is 40 mm long and 30 mm wide. The control torque is 240*10-6 N-m on full scale. If magnetic flux density is 1Wb/m2 range of meter is

    • A3 mA.
    • B1 mA.
    • C2 mA.
    • D4 mA.
    Answer: 2 mA.
  39. 89.

    The solid angle subtended by an area of 2400 cm^2 on the surface of a sphere of diameter 1.2 m is

    • A3 / 2.
    • B2 / 5.
    • C1 / 3.
    • D2 / 3.
    Answer: 2 / 3.
  40. 90.

    Feedback circuit in an oscillator can be accomplished by

    • ACapacitive coupling between input and output
    • BAny one or combinations of the above methods
    • CInductive coupling between input and output
    • DResistive coupling between input and output
    Answer: Any one or combinations of the above methods
  41. 91.

    In a 2 pole lap winding dc machine , the resistance of one conductor is 2Ω and total number of conductors is 100. Find the total resistance

    • A10Ω
    • B100Ω
    • C200Ω
    • D50Ω
    Answer: 50Ω
  42. 92.

    The normal voltage used in directional heating is

    • A15 KV.
    • B33 KV.
    • C66 KV.
    • D1.5 KV.
    Answer: 1.5 KV.
  43. 93.

    The number of output pins in 8085 microprocessors are

    • A19.
    • B40.
    • C21.
    • D27.
    Answer: 27.
  44. 94.

    In 8085 name/names of the 16 bit registers is/are

    • Aboth A and B.
    • Bprogram counter.
    • Cstack pointer.
    • Dnone of these.
    Answer: both A and B.
  45. 95.

    In a lap winding dc machine number of conductors are 100 and number of parallel paths are 10. Find the average pitch

    • A50
    • B1
    • C10
    • D100
    Answer: 10
  46. 96.

    Two long parallel conductors carry 100 A. If the conductors are separated by 20 mm, the force per meter of length of each conductor will be

    • A100 N.
    • B0.1 N.
    • C1 N.
    • D0.01 N.
    Answer: 0.1 N.
  47. 97.

    A diode (p-n junction) when reverse biased act as

    • AOff Switch
    • BZener diode
    • CCapacitor
    • DOn Switch
    Answer: Off Switch
  48. 98.

    In electronic communications, "AM" stands for

    • AAmplitude Method
    • BAmp Modification
    • CAmpere Method
    • DAmplitude Modulation
    Answer: Amplitude Modulation
  49. 99.

    Power dissipation in ideal inductor is

    • AZero
    • BA finite value
    • CMaximum
    • DMinimum
    Answer: Zero
  50. 100.

    Magnetic flux has the unit of

    • AWeber
    • BNewton
    • CAmpere turn
    • DTesla
    Answer: Weber

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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.