Identify the standardized electrical symbols for the following common controls: indoor fan relay, humidistat, manual reset, crankcase heater
What will be an ideal response?
Indoor fan relay: IFR; humidistat: HS; manual reset: RM; crankcase heater: C-HTR
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Opening the secondary circuit of a current transformer under load will cause a dangerous level of _____.
a. induced high voltage b. induced high current c. high impedance d. low impedanc
A spark tester should be used to check for spark because ________
A) It can detect a cracked spark plug B) It can detect the gap of the spark plugs C) A spark tester requires at least 25,000 volts to fire D) It is connected to the CKP sensor to check its output
In current practice in a truck service facilities, when should a truck brake drum be machined?
A. when heat checked B. when heat discolored C. when scored D. only when new
Multisplit manufacturer's installation instructions will specify the maximum total installed piping length which can be supported by the charge shipped in the unit. If additional piping is installed the only correct way to charge the system is to:
A) Add the specified amount of refrigerant for each additional foot of refrigerant line. B) Charge the system to the required superheat. C) Charge the system to the required subcooling. D) None of the above.