Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN: 9781337399128
Author: Russell E. Smith
Publisher: Cengage Learning
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The by pass control circuit is
otherwise called as
O a. bleed off circuit
O b. meter-in-circuit
O c. secondary control
circuit
O d. primary control circuit
Technician A says that installing a thermostat
incorrectly can cause the housing to break.
Technician B says that it is OK to install a
thermostat in either direction. Who is
correct?
Select one:
a. Technician A only
b. Technician B only
C. Both A and B
d. Neither A nor B
An overheating vehicle is being discussed.
Technician A states that the thermostat is
open until the engine fully warms up.
Technician B states that the vehicle may be
overheating because the thermostat is stuck
closed. Who is correct?
Select one:
a. Technician A only
b. Technician B only
c. Both Technicians A and B
d. Neither Technician A nor B
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Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
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- Wiring harnesses are typically shielded by plasticconduit. What color is normally used to shield SRSrelatedwiring?a. Blackb. Greenc. Yellowd. Orangearrow_forwardLockout locks: Can be used to lock tool boxes, storage sheds, etc. b. Can be used only for lockout purposes. Are provided by the equipment manufacturer. d. a. C. Must be bright orange in color. Authorized employees must be trained: To recognize hazardous energy sources, and to know the type and magnitude of the hazardous energy sources. b. a. To perform the lockout/tagout procedure. C. When an audit shows deficiencies with the procedure. d. All of the above. When authorized employees perform a shutdown they must: a. Notify all affected employees that they are starting a lockout procedure, b. Locate all energy sources that power the equipment. Follow the procedures to shut down each machine. d. All of the above. с. If several people are needed to work on a piece of equipment: a. The first worker to arrive to the job is the one who applies the locks. b. Their supervisor is the only one who needs to apply a lock. c. Each worker must apply his or her own lock. d. The person who will be the…arrow_forward9.a. A chain-drive system can be aligned easier than a belt-drive system since the chain-drive systemA. can have the chain removed while the final alignment is taking place.B. can have a string left on the sprockets after the alignment is complete.C. is less critical to misalignment. 9.b. When you're first starting a PM program, and you want to check motor starter and contactor contacts,how often should you perform a PM inspection on these devices?A. Every two monthsB. Every monthC. Every six monthsarrow_forward
- to run d. both a and b 44. Ifa thermostatic expansion valve's thermal bulb came loose from the suction line at the outlet of the evaporator, whích of the following could result? The bulb pressure would increase and the c. thermostatic expansion valve would open. b. The superheat in the evaporator would decrease. a. Liquid refrigerant would flow back to the compressor. d. All of the above are correct. 45. If the thermal bulb assembly develops a leak, what will occur? All of the system's refrigerant will leak a. The valve will open to allow more c. refrigerant to flow. d. It will have no effect on system operation. out. b. The bulb pressure will reduce and the valve will close. 46. The purpose of an externally equalized thermostatic expansion valve is to compensate for excessive evaporator pressure drop b. allow system to equalize faster a. prevent the expansion valve from frosting up d. c. allow refrigerant to expand in the compressor 47. The primary function of an expansion device is…arrow_forwardbox ur anser dont cop from another postarrow_forwardWhich of the following systems generate more energy when used in industrial applications? a. pneumatic systems b. hydraulic systems c. none of the listed d. both systems generate same energyarrow_forward
- Lockout may involve: Opening a disconnect switch. b. Closing a valve. Placing a block in the equipment. d. All of the above. a. C.arrow_forwardIn a DCV, this part moves the spool, it can be a lever or a button a. operator b. springs c. spool d. valve bodyarrow_forwardWhich of the following components is NOT a type of ventilation system? Select one: a. Airconditioning Units b. Venting Skylight c. Boilers d. Exhaust Fansarrow_forward
- An overheating vehicle is being discussed. Technician A states that the vehicle may be overheating because the heater control valve is stuck closed. Technician B states that the vehicle may be overheating because the PCM in not energizing the cooling fan relay. Who is correct? Select one: a. Technician A only b. Technician B only c. Both Technicians A and B d. Neither Technician A nor Barrow_forwardWhich of the following is commonly used as a transmissionneutral start switch?a. Mercuryb. Momentaryc. MPMTd. SPSTarrow_forwardFrom the following identify the true statement relating to the term Preventive maintenance The maintenance done after the failure of machine and can't save energy during the process. O The maintenance done before the failure of machine and can save energy during the process. O The maintenance done before the failure of machine and can't save energy during the process. The maintenance done after the failure of machine and can save energy during the process.arrow_forward
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