Electricity for Refrigeration, Heating, and Air Conditioning
9th Edition
ISBN: 9781285179988
Author: Russell E. Smith
Publisher: Cengage Learning
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Chapter 14, Problem 16RQ
True or False: A thermocouple is strong enough to close the pilot safety solenoid in a gas valve.
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Pressure relief valves:
Select one:
a. Open manually upon overloading in
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O b. Open automatically upon overloading
in pressure
c. Two directional valve
d. Oil flow control valve
Industrial pipes
What precautions should be taken when opening a supply valve from a flexible hose connected to a pipe outlet?
is a type of safety valve used to control or limit the pressure in a system.
Select one:
O a. On and off valve
O b. One way flow control valve
O . Shutoff valve
O d. Pressure relief valve
Chapter 14 Solutions
Electricity for Refrigeration, Heating, and Air Conditioning
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- Describe how a thermocouple flame-proving system functions.arrow_forwardBriefly explain how a thermocouple works in determining temperatures.arrow_forwardCoolant hoses are being discussed. Technician A states that many manufacturers recommend coolant hose replacement on a maintenance schedule. Technician B states that coolant hoses can fail prematurely due to contamination by oil. 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_forward
- Briefly describe a combination-dependent leak.arrow_forwardTechnician A says that some refrigerant leaks can also be traced to pinholes in the evaporator caused by acid, which forms when water and refrigerant mix. Technician B says that leaks are most often found at the compressor hose connections and at the various fittings and joints in the system. Who is correct? Technician A only Technician B only Both A and B Neither A nor Barrow_forwardWhy should a condenser be covered with a sheet before leak checking it with an electronic detector?arrow_forward
- The flow pattern can be controlled by which equipment or part of the vessel?A. BafflesB. ImpellersC. Baffles and impellersD. None of these.arrow_forwardd. Check oil level & moisture content 19. If the main wire (coil) to the distributor and the coil to the switch are broken, replace them and make sure the connections are clean and tight relevant to a. Breaking system b. Ignition system c. Ventilation system d. Combustion system 20. The required gap in ignition system between---------- a.-4 to 5 b.-0.4 to 5 c.-0.4 to 0.5 d.-4 to 0,5 |21. Which of the following is the fouled of spark plug a. Soot b. Oil c. Over heated d. All of the above |22.The suitable thread of spark plug for heavy engine is a. M19 b. M18 c. M15 d. M16 23. Using a Torque wrench, tighten the plugs to the specified torque. (Most) 4mm plugs are torqued to four kilograms per square inch. a. True b. False 24. Start the engine and evaluate its performance refers to a. Weekly Maintenance b. Annually Maintenance c. Daily Maintenance d. None of them 25. Check to see if Dynamo is working properly. If necessary, adjust the regulator refers to a. Weekly Maintenance b. Annually…arrow_forwardWhat causes coolant to leak from the water pump weep hole? Select one: a. A faulty thermostat b. A faulty radiator cap C. A faulty bypass hose d. A faulty pump shaft sealarrow_forward
- 17. Which of the following relief valves is designed to vent refrigerant under excessive pressure and then close when the system pressure has been lowered? A. Fusible plug. B. Manifold valve. ytor C. Rupture disc. D. Spring-loaded relief valve. e quicaarrow_forward9. While preparing to remove an engine: Technician A disconnects the refrigerant lines at the air-conditioning compressor and allows the refrigerant to totally leak out before removing the compressor. Technician B installs plugs in the ends of the refrigerant hoses after they have been disconnected. Who is correct?arrow_forwardplease do it fastarrow_forward
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