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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Three different types of thermocouples
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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
I NEED BOTH QUESTION TYPED ANSWER PLEASE DETAIL ANSWER
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
- Q1 When pressure is 0.05 atm, what is the: The melting temperature of ice The boiling temperature of waterarrow_forwardsend help plsss. At 1:00 PM, a thermometer reading 70 °F is taken outside where the air temperature is -10 °F. At 1:02 PM, the reading is 26 °F. At 1:05 PM, the thermometer is taken back indoors where the air temperature is at 70 °F. What is the thermometer reading at 1:10 PM?arrow_forwardall neededarrow_forward
- 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
- The Fusible plug in a boiler is used to prevent damage to the boiler: OPTIONS: 1.May be 2.False 3.True 4.May not bearrow_forwardTRUE OR FALSE: The pressure variation from any point to another will be determined by applying Newton’s second law.arrow_forward4_Vacuum pump is used in thermal conductivity exp. To Select one:a. All of themb. To fix the glass containerc. To allow only for conductiond. to avoid radiation 5_select the most accurate statement Select one:a. Absolute pressure is large than atmospheric pressureb. Absolute pressure is smaller than atmospheric pressurec. Absolute pressure has the same value reading with gauge pressured. Absolute pressure has a larger reading value than gauge pressure 6_KPa is Select one:a. Newton per square millimeter b. Kilonewtons per square meterc. Newton per square meterd. Kilonewton per square millimeterarrow_forward
- Latent heat causes A. a higher thermometer reading. B. temperature to rise. C. a change of state. D. temperature to fall.arrow_forward2.A. You can usually check for a leak in a vacuum system by looking at or feelingA. at the exhaust of the vacuum pump.B. at the vacuum gauge at the vacuum pump.C. for signs of dirt on the piping. 2.B. When you measure the voltage drop across a set of contacts, you'reA. checking the quality of the contact set.B. sensing how much current is flowing in the circuit.C. measuring the equivalent motor resistance. 2.C. A chain-drive system can be aligned easier than a belt-drive system since the chain-drive systemA. can have a string left on the sprockets after the alignment is complete.B. can have the chain removed while the final alignment is taking place.C. is less critical to misalignment.arrow_forwardHow to calibrate a thermometer?arrow_forward
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