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_forwardto 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_forward
- Which 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_forwardLockout may involve: Opening a disconnect switch. b. Closing a valve. Placing a block in the equipment. d. All of the above. a. C.arrow_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
- In 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_forwardWhich of the following is commonly used as a transmissionneutral start switch?a. Mercuryb. Momentaryc. MPMTd. SPSTarrow_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_forward14.A. What type of seal system is constructed of a hard brittle material and is often used in a pump to sealbetween the pump and the motor?A. SteelB. CeramicC. Glass 14.B. When a pneumatic solenoid fails, the failure is normally due to aA. weak pilot.B. bad spool.C. ripped seal. 14.C. When you're dealing with a PM task for a drive-belt form of conveyor, and you must make trackingadjustments to the belt, you shouldA. pull the belt back with pliers or a belt puller and see if it returns to the previous tracking marks. B. perform tracking adjustments at both ends of the belt.C. make a small adjustment, then continue with small adjustments as needed.arrow_forwardSelect the most accurate system from the following, O a. Lamp with on/off switch O b. Room heating system O c. Traffic light O d. Air conditionerarrow_forward
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