Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Textbook Question
Chapter 49, Problem 6RQ
When condenser tubes become fouled, they may be cleaned by
A. using a steel brush.
B. using a brass brush.
C. using a chisel and hammer.
D. running a mixture of sand and water through them.
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Why do some condensers have to be cleaned with brushesand others with chemicals?
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Chapter 49 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 49 - How does the compressor lubrication system differ...Ch. 49 - True or False: Most reciprocating compressors have...Ch. 49 - True or False: All reciprocating compressors start...Ch. 49 - Describe how a centrifugal compressor starts up at...Ch. 49 - Describe how a centrifugal compressor starts up at...Ch. 49 - When condenser tubes become fouled, they may be...Ch. 49 - Describe what happens when an absorption chiller...
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- Why do some condensers have to be cleaned with brushes and others with chemicals?arrow_forwardWho should be consulted when condenser cleaning is needed?arrow_forward4.a. You can usually check for a leak in a vacuum system by looking at or feelingA. at the vacuum gauge at the vacuum pump.B. for signs of dirt on the piping.C. at the exhaust of the vacuum pump. 4.b. When a pneumatic solenoid fails, the failure is normally due to aB. weak pilot.C. bad spool.D. ripped seal.arrow_forward
- 1-While refilling an 8-quart (7.57 L) system with coolant: Technician A initially puts in 4 quarts (3.78 L) of straight coolant and tops it off with water. Technician B fills the system with the correct mixture, tightens the radiator cap, and then checks for leaks. Who is correct? 2-While checking for conditions that might cause coolant electrolysis: Technician A places the positive lead of a voltmeter into the coolant and connects the negative lead to a ground. Technician B checks for the presence of voltage in the coolant with the ignition off. Who is correct? 3-Technician A says that if the PCV valve or connecting hoses become clogged, excessive pressure will develop in the crankcase and can cause oil leaks. Technician B says that if the PCV valve or connecting hoses become clogged, oil may be pushed into the air cleaner or cause it to be drawn into the intake manifold. Who is correct? 4-While bleeding air from a cooling system: Technician A loosens a heater hose at its highest…arrow_forwardWhat kind of circuit balancing valve is used in the hot and chilled water piping? a. balancing globe valve b. shut-off balancing valve c. pressure balancing valve d. pressure by-pass valvearrow_forwardWhat are Siamese hoses?arrow_forward
- Technician A feels up and down the face or along the return bends of the condenser for a temperature change and says that there should be a gradual change from hot to warm from the bottom to the top. Technician B says that a restriction in the condenser will be evident by a sudden change in temperature. Who is correct? Technician A only Technician B only Both A and B Neither A nor Barrow_forwardWhat will happen if the float in an oil separator collapses?arrow_forwardSelect the type of coolant which is very toxic. O a. Mix of Long-Life ethylene glycol and Propylene glycol Ob. Ethylene glycol O c. Propylene glycol O d. Long-Life ethylene glycolarrow_forward
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