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 11, Problem 6RQ
True or False: To check the temperature leads of an electronic thermometer for low temperatures, they should be stirred in a container of crushed ice, water, and a table-spoon of salt.
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1.During a refrigerant system performance test the following results are recorded: outside ambient temperature of 908F, high-side gauge reading of 145 psi, and low pressure gauge reading of 14 psi. What is indicated by these results?
A. Faulty refrigerant compressor
B. Normal refrigerant system operation
C. Low refrigerant levels
D. A restriction on the high side of the refrigerant system
2. A customer complains of poor air-conditioning cooling performance. During a system performance test, the low-side gauge reading is 50 psig; the high-side gauge reading is 310 psig; and the ambient air temperature is 818F (27.228C). What is the least likely cause of the above results?
A. Restricted airflow through condenser
B. Refrigerant overcharge
C. Refrigerant undercharge
D. Overcharge of refrigerant oil
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Chapter 11 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 11 - What does "calibrating an instrument" mean?Ch. 11 - Three reference points that may be used to check...Ch. 11 - Prob. 3RQCh. 11 - Temperature-measuring instruments may be designed...Ch. 11 - Glass stem thermometers are being replaced by...Ch. 11 - True or False: To check the temperature leads of...Ch. 11 - Accuracy of a thermometer is more important in the...Ch. 11 - Prob. 8RQCh. 11 - Prob. 9RQCh. 11 - What should a gauge manifold reading indicate when...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
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- Find the DE: At 1:00PM, a thermometer reading 70 degree F is taken outside where the air temperature is -10 degree F.At 1:02PM, the reading is 26 degree F. At 1:05PM, the thermometer is taken back indoors where the air is at 70 degree F. What is the thermometer reading at 1:09PM?arrow_forwardAn hydrogen vapour container is mounted with a pressure gauge which shows 80 bar. Then its absolute pressure is _______bararrow_forwardAn oxygen vapour container is mounted with a pressure gauge which shows 80 bar. Then its gauge pressure is bar Pressure in bararrow_forward
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