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 8, Problem 3RQ
The ________is both the greatest asset and the greatest liability of an electronic leak detector.
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Chapter 8 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 8 - The low-pressure side of the system must not be...Ch. 8 - Name and briefly describe the six classes of...Ch. 8 - The ________is both the greatest asset and the...Ch. 8 - Why should oxygen or compressed air never be used...Ch. 8 - List some of the foreign matter that may enter a...Ch. 8 - True or False: A vacuum pump can remove any type...Ch. 8 - Air in a refrigeration system causes which of the...Ch. 8 - The only two products that should be circulating...Ch. 8 - In order to remove moisture from a refrigeration...Ch. 8 - Are the best vacuum pumps one-stage or two-stage?
Ch. 8 - Name the two types of vacuum procedures used by...Ch. 8 - What can be done to get water out from under the...Ch. 8 - When evacuating a refrigeration system that has...Ch. 8 - What is today's most accurate type of deep vacuum...Ch. 8 - _________microns are in 1 inch.Ch. 8 - Briefly describe the method for cleaning up a...Ch. 8 - What is the advantage of using large gauge lines...Ch. 8 - Why is it important to change the oil on a vacuum...Ch. 8 - Describe the meaning of a deep vacuum, and explain...Ch. 8 - List the main advantages of a microfoam leak...Ch. 8 - What could an oily dust spot on a condenser or...Ch. 8 - Why should a condenser be covered with a sheet...Ch. 8 - Leaks that occur only when the unit is in...Ch. 8 - Briefly describe a combination-dependent leak.
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- Alternation and inspection of equipment are the primary functions of maintenance. Select one: True Falsearrow_forwardWhich type of detector is best suited for gauging aluminum thickness, and why? a. Geiger-Mueller Tube(s) b. Ion Chamber(s) c. Scintillation Detector(s) d. None of the abovearrow_forwardWhy should the probe of an electronic leak detector be placed below the area being checked?arrow_forward
- Explain the basic concept of Temperature and Pressure Sensor.arrow_forwardBy monitoring the condition of the machine, preventive maintenance can not be performed to increase the operational life of a machine. Select one: True Falsearrow_forwardWhich of the following is a digital transducer? a. Strain gauge b. Thermistor c. LVDT d. Encoderarrow_forward
- Presence detectors, thermostat and pressure plate are not examples of automated systems. Select one: True Falsearrow_forwardIn an hydraulic control system, the connecting linkage has areliability factor of 0.98. The pressure sensor that actuates thelinkage has a reliability factor of 0.92. The pressure sensor actuatesthe valve that has a reliability factor of 0.90. Assume that all the threeelements namely; the actuator, the linkage and the hydraulic valveare connected in series with independent reliability factors.- What is the reliability of the control system?arrow_forwardDifferential pressure flow sensors measure flow by measuring the pressure difference across a/an ___________. a. pipe b. restriction c. opening d. linearrow_forward
- 19. A thermocouple is an (active/passive) sensor.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_forwardPROCESS INSTRUMENTATION AND CONTROL Explain with a neat sketch the principle of Ultrasonic flow meter.arrow_forward
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