What causes the little pops and pings can be heard in some furnaces before the blower comes on?
A) Small concentrated pockets of gas that explode
B) Expansion of the heat exchanger as it heats up
C) Mechanical rattles from an unbalanced indoor blower
D) Small quantities of water in the gas
B
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Base kitchen cabinets are typically ____ deep.
A. 24" B. 18" C. 22" D. 30"
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What are the disadvantages of an ammeter?
What will be an ideal response?
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When using an oscilloscope to make measurements, the first step is _____.
A. initializing the scope B. connecting the probe to the circuit C. connecting the ground lead to circuit ground D. compensating the probe
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The blower motor is a two speed, permanent magnet electric motor
Indicate whether the statement is true or false
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