What does the emergency heat setting do on a heat pump thermostat?
A) De-energizes the refrigeration circuit and operates the system on auxiliary heat
B) Sounds an alarm whenever the temperature drops below the thermostat set point
C) Adds auxiliary heat to the heat from the refrigeration circuit in cold weather
D) Shuts down all system operation to prevent damage to the system components
A
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All of the following are correct statements about braking EXCEPT ________
A) Kinetic energy must be absorbed by the braking system B) The heavier the vehicle, the greater the kinetic energy when moving C) If the vehicle weight is doubled, the kinetic energy of a moving vehicle is doubled D) Kinetic energy of a vehicle doubles when the speed doubles
The single most important piece of evidence to bolster the Roman church’s claim to primacy was the
a. Little Peace of the Church. b. Petrine authority. c. Tetrarchy. d. works of Tertullian.
When using a motor other than a NEMA Design A or B with a VFD, what added precaution must be taken?
a. Use a totally enclosed motor b. Add special drive circuitry c. Add an IGBT to the motor d. Increase supply voltage by 10 percent
The greater the velocity the fluid flows through an orifice, the __________ the differential pressure that develops across it.
A. less B. greater