A drawback of replacing circuit boards one at a time to isolate a fault is ________

A) an external problem may cause the replacement boards to fail as well
B) it cannot isolate multiple faults in a system
C) it requires keeping duplicates of all the circuit boards in a system
D) All of the above


D

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One of the advantages of an SSR over an EMR is its _____.

a. low initial cost b. resistance to effects of temperature c. ability to withstand surge currents d. response time

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Is it true that oxygen diffuses into soil and carbon dioxide diffuses out?

Indicate by YES (Y) or NO (N).

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What could cause a false high reading for the supply-air temperature?

A) The temperature is taken with the blower on at the same time the heating elements are on. B) The temperature is taken with a probe inserted upside down. C) The probe is inserted in the supply plenum in a direct line of sight with the heating elements. D) The temperature is taken after the unit has been running for too long.

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____________________ is a part of a whole number expressed in hundredths.

Fill in the blank(s) with the appropriate word(s).

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