Hero Skill Innovation And Employability Program

30 Questions | Total Attempts: 87

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Hero Skill Innovation And Employability Program - Quiz


Questions and Answers
  • 1. 
    To prevent a DC return between source and load, it is necessary to use
    • A. 

      Resistor between source and load

    • B. 

      Inductor between source and load

    • C. 

      Capacitor between source and load

    • D. 

      Either (a) or (b)

  • 2. 
    For a base current of 10 μA, what is the value of collector current in common emitter if βdc = 100
    • A. 

      10 μA

    • B. 

      100 μA

    • C. 

      1 mA

    • D. 

      10 mA

  • 3. 
    To protect the diodes in a rectifier and capacitor input filter circuit it is necessary to use
    • A. 

      Surge resistor

    • B. 

      Surge inductor

    • C. 

      Surge capacitor

    • D. 

      Both (a) and (b)

  • 4. 
    If the input to the ideal comparator shown in the figure is a sinusoidal signal of 8 V (peak to peak) without any DC component, then the output of the comparator has a duty cycle of
    • A. 

      1/2

    • B. 

      1/3

    • C. 

      1/6

    • D. 

      1/12

  • 5. 
    N a CE amplifier the input impedance is equal to the ratio of
    • A. 

      Ac base voltage to ac base current

    • B. 

      Ac base voltage to ac emitter current

    • C. 

      Ac emitter voltage to ac collector current

    • D. 

      Ac collector voltage to ac collector current

  • 6. 
    For a system to work, as oscillator the total phase shift of the loop gain must be equal to
    • A. 

      90°

    • B. 

      45°

    • C. 

      270°

    • D. 

      360°

  • 7. 
    The most widely used LC oscillator is
    • A. 

      Hartley oscillator

    • B. 

      Crystal oscillator

    • C. 

      Colpitt's oscillator

    • D. 

      Clapp's oscillator

  • 8. 
    "Half-splitting" is
    • A. 

      A means for nuclear fuel cells to produce electricity

    • B. 

      A means of isolating a problem in a circuit

    • C. 

      A means for reducing a high ac voltage to a low dc voltage

    • D. 

      A means of limiting current in a circuit

  • 9. 
    If the resistance in a circuit with constant voltage increases, the current will
    • A. 

      Increase

    • B. 

      Decrease

    • C. 

      Stay the same 

    • D. 

      None

  • 10. 
    What is the power in the given circuit?
    • A. 

      3.6 W

    • B. 

      35 W

    • C. 

      175 W

    • D. 

      245 W

  • 11. 
    A battery's capacity to deliver power is measured in
    • A. 

      Kwh

    • B. 

      Ah

    • C. 

      Mh

    • D. 

      Vh

  • 12. 
    If current through a resistance is halved
    • A. 

      The resistance is halved

    • B. 

      The voltage is halved

    • C. 

      The voltage doubles

    • D. 

      None of the above

  • 13. 
    Ohm's law is a relationship between
    • A. 

      Voltage, current, and time

    • B. 

      Power, current, and resistance

    • C. 

      Resistance, time, and current

    • D. 

      Voltage, current, and resistance

  • 14. 
    The brake power of a diesel engine, keeping other parameters constant, can be increased by
    • A. 

      Decreasing the density of intake air

    • B. 

      Increasing the temperature of intake air

    • C. 

      Increasing the pressure of intake air

    • D. 

      Decreasing the pressure of intake air

  • 15. 
    The expansion of fuel in a four stroke cycle diesel engine
    • A. 

      Starts at 15° before top dead centre and ends at 30° after top dead centre

    • B. 

      Starts at top dead centre and ends at 30° after top dead centre

    • C. 

      Starts at 15° after top dead centre and ends at 30° before bottom dead centre

    • D. 

      May start and end anywhere

  • 16. 
    Reactors for propulsion applications are designed for
    • A. 

      Any form of uranium

    • B. 

      Natura uranium

    • C. 

      Enriched uranium

    • D. 

      Plutonium

  • 17. 
    The primary fuel used in nuclear power plants is
    • A. 

      U235

    • B. 

      U238

    • C. 

      Pu239 

    • D. 

      Pu233

  • 18. 
    In which of the following are operational amplifiers (op-amps) used?
    • A. 

      Oscillators

    • B. 

      Filters

    • C. 

      Instrumentation circuits

    • D. 

      All of the above 

  • 19. 
    For an op-amp having a slew rate SR = 5 V/ms, what is the maximum closed-loop voltage gain that can be used when the input signal varies by 0.2 V in 10 ms?
    • A. 

      150

    • B. 

      200

    • C. 

      250

    • D. 

      300

  • 20. 
    What is the level of the voltage between the input terminals of an op-amp?
    • A. 

      Virtually zero

    • B. 

      5 V

    • C. 

      18 V

    • D. 

      22 V

  • 21. 
    A three-stage op-amp can have a maximum phase lag of ________°.
    • A. 

      -180

    • B. 

      -90

    • C. 

      -270

    • D. 

      None of these

  • 22. 
    The summing amplifier contains an inverting amplifier.
    • A. 

      True

    • B. 

      False

  • 23. 
    Which of the following symptom is caused as a result of brake disc run out ?
    • A. 

      Ineffectiveness of the brakes

    • B. 

      Judder during braking

    • C. 

      Localized wearing of the brake pads

    • D. 

      Rapid wearing of the brake pads

  • 24. 
    The function of an alternator in an automobile is to
    • A. 

      Supply electric power

    • B. 

      Convert mechanical energy into electrical energy

    • C. 

      Continually recharge the battery

    • D. 

      Partly convert engine power into electric power

  • 25. 
    In a unit type body (frameless body) design, the sheet metal parts are welded together, forming a frame work to which outer skin is attached.
    • A. 

      True

    • B. 

      False

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