Quiz  /  Voltage Regulator Class 9 MCQ Questions With Answers

  • 1. 
    The ash remaining from burned coal that is collected in the ash hopper is called slag or _____.

  • top ash
  • soot
  • bottom ash

  • 2. 
    The “pressure” pushing the electrons along is called the ___________

  • Amperage or current
  • voltage
  • wattage

  • 3. 
    What does this symbol stand for

  • Voltage
  • Volts
  • Voltmeter
  • Visibility

  • 4. 
    To reuse the exhaust steam a large hollow box is attached to the exhaust opening of the turbine. This box is referred to as a ____________through which relatively cool water is pumped.

  • heat exchanger
  • heat pump
  • Condenser

  • 5. 
    In a circuit with large resistance, a __________ current will flow.

  • Large
  • Positive
  • Negative
  • Small

  • 6. 
    Insulators such as ______________and ______________ are good materials that do not allow electrical current to flow through them.

  • glass and fiber glass
  • copper and aluminum
  • wood and titanium

  • 7. 
    Voltage is

  • Also called 'potential difference'
  • The difference in energy of the electrons leaving and returning a battery
  • Measured using a voltmeter
  • All of the above

  • 8. 
    A conductor has _____ resistance. An insulator has ______ resistance.

  • Low; high.
  • Negative; positive.
  • Positive, negative.
  • High, low.

  • 9. 
    If there are fewer turns in the primary winding than in the secondary winding, the transformer is said to be a _____________ transformer.

  • step-down
  • step-up
  • powerful

  • 10. 
    Sufficient heat to raise the fuel/air temperature of the fuel to reach ignition temperature is provided by the ________________.

  • Torches
  • flame throwers
  • Ignitors

  • 11. 
    A resistor

  • Is the same as resistance
  • Is connected to a circuit in parallel
  • Is used in a circuit to control the amount of current
  • Is not measured in ohms

  • 12. 
    The _____________ is a heater that reheats the steam after it has been through part of the turbine.

  • Superheater
  • Reheater
  • thermal chamber

  • 13. 
    In order to put dry steam into the turbine; the steam must be heated to a higher temperature than that which was generated in the waterwalls. The most common method of heating is using a device known as a ______________.

  • thermal inductor
  • baking oven
  • Superheater
  • All of above

  • 14. 
    Series circuits have ________ resistance. Parallel circuits have _______ resistance.

  • Negative, positive.
  • High; low.
  • Low; high.
  • Positive, negative.

  • 15. 
    The formula for resistance is:

  • R = V / I
  • R = V I
  • R = V - I
  • R = I / V

  • 16. 
    Resistance is

  • Measured using an ammeter
  • Units are 'volts'
  • How difficult it is for electrons to move through an object
  • The continuous movement of electrons in a wire

  • 17. 
    In a circuit with small resistance, a _________ current will flow.

  • Large
  • Small
  • Negative
  • Positive

  • 18. 
    A____________ is an electrical device by which alternating current of one voltage is changed to another voltage.

  • Capacitor
  • Transformer
  • Resistor

  • 19. 
    The total resistance in this circuit is equal to

  • 120 ohms
  • 15 ohms
  • 60 ohms
  • 30 ohms

  • 20. 
    Most of the furnace heat is absorbed by the boiler tubes, superheater and reheaters. However, some of the remaining heat that would otherwise go out the stack is left to heat the feed water. The economy of the system is increased by adding a bank of tubes to preheat the water. This bank of tubes is called the______________.

  • economizer
  • heat regulator
  • water heater

  • 21. 
    The ___________________ are placed directly in the walls of the furnace to absorb the greatest possible amount of heat in the boiler.

  • fire hoses
  • Waterwall tubes
  • insulating pads

  • 22. 
    A voltmeter is connected to a circuit

  • In parallel
  • Next to a bulb
  • In series
  • Directly opposite a power pack

  • 23. 
    _____________have low resistances and ________________ have very high resistances.

  • conductors and insulators
  • resistors and capacitors
  • diodes and capacitors
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