A thermostat that can control multiple levels of heating and cooling is called a/an ____ thermostat.
A. isolating
B. zoning
C. setback
D. staging
Answer: D
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The IRC requires a heating unit to be installed in any residence built in an area where the winter design temperature is below ____°F.
A. 58 B. 60 C. 63 D. 68
List the basic requirements for OSHA’s Hearing Conservation Standard.
What will be an ideal response?
The subsequent problems deal with the circuit shown below. Assume that the diode is ideal (i.e., has a 0V forward bias voltage).
What condition is required for the diode to be forward biased?
A. V1 > 0 B. V1 + V2 > 0 C. V2 ? V1 > 0 D. V1 ? V2 > 0 E. V2 < 0
When changing the superheat setting on a TXV, _____
a. the system must be shut down b. the system must be in operation c. completely remove the packing nut from the adjusting stem d. close off the equalizer line until the adjustments are complete