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S4-Q112.) The measurement of real electrical power is read by a/an?

a.) Voltmeter
Is wrong because a voltmeter measures EMF or Electromotive Force only.
b.) Amp meter
Is wrong because an ampmeter measures current flow in a circuit only.
c.) *Watt meter
Is correct because a wattmeter measures electrical power. 746 Watts equals one horsepower.
d.) Infrared temperature device
Is wrong because an infrared temperature device measures temperature only.

S4-Q113.) Using Ohms Law in an AC circuit requires the use of ___________ rather than _____________ that
is in the formula for DC circuits.

a.) E-voltage, I-amperage
Is wrong-neither voltage nor amperage are substituted for Z in an AC circuit.
b.) Z-impedance, I-amperage
Is wrong because impedance, while being a correct measurement of resistance in an AC circuit, does
not substitute for amperage.
c.) R-resistance, I–amperage
Is wrong because while R-resistance is what is substituted for by Z-impedance, amperage must also
be included.
d.) *Z- impedance, R-resistance
Is correct because Z-is a measurement of AC resistance to current flow and R- is a measurement
of resistance in a DC circuit.

Section 5: Governors

S5-Q114.) Speed droop is?

a.) The difference between high idle and low idle engine speed.
Is wrong because there is no need to even know the difference between these two speeds.
b.) *The difference between unloaded and loaded engine RPM as measured by percentage.
Is correct-when an engine speed drops as a load is increased, the difference RPM is measured
always as a percentage (i.e.) 5% drop is common.
c.) The RPM between unloaded engine speed and loaded speed
Is wrong-speed droop is measured as a percentage, not just RPM drop from high idle to loaded speed.
d.) None of the above
Is wrong because there is one correct answer.

S5-Q115.) The engine speed is compared to a speed reference setting. How fast the governor responds to an
error is known as:

a.) Rate
This is a predictive measure that responds in advance to an error. It is not very precise and not often
used in fast processes such as engine speed.
b.) Reset
This is a slow response to error. As long as there is error, there will be correction. This means the
governor would slowly and continuously increase or decrease output to remove the error.
c.) *Gain
Correct. Gain is a proportional response to error. Whatever error occurs the governor will
respond to it with an appropriate, proportional output.
d.) Speed to voltage differential
Not used in control of governors.

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