?Which of these is a common type of solid-state sensing element?
A. ?positive temperature coefficient thermistor
B. ?negative temperature coefficient thermistor
C. ?k-type thermocouple
D. ?j-type thermocouple
Answer: B
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Output driver modules are capable of controlling up to ____________________ separate outputs
Fill in the blank(s) with the appropriate word(s).
Why does a heat pump need two metering devices?
A) Two metering devices provide increased refrigerant flow at low ambient temperatures in heat. B) One metering device is used for first-stage heat and another for auxiliary heat. C) One metering device is used for the refrigerant circuit and another for the heat strips. D) One metering device is used for the cooling cycle and one for the heating cycle.
To ensure protection against backflow, hose bibbs are required to include _____
a. air gaps b. check valves c. vacuum breakers d. flexible water lines
How do you define diesel engine breathing efficiency?
A. Total volume of exhaust gases as a percentage of engine displacement. B. Ratio of the maximum compression pressure to maximum cylinder pressure expressed as a percentage. C. Total air volume required to maintain any given engine RPM. D. Actual volume of air taken in during the intake stroke versus cylinder swept volume.