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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Chapter 50, Problem 9RQ
To determine
The intention behind using an economizer.
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b.has air-conditioning and is an automatic.c.has air-conditioning or is an automatic.d.has air-conditioning given that it is an automatic.e.is an automatic if it has air-conditioning.
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For a cooling tower, the drift loss means,
a. water lost in the form of droplets
b. leakge losses due to leakges
c. water loss to control concentration of
salt and other impurities.
d. water lost in the form of evaporation
Chapter 50 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 50 - Which of the following is true regarding the...Ch. 50 - Which process would best represent the opposite of...Ch. 50 - Mixed air is best described as the combination of...Ch. 50 - Which of the following should be taken into...Ch. 50 - A bonded roof is one that has A. reinforced steel...Ch. 50 - Properly installed roof curbs will reduce the...Ch. 50 - When rigging a unit to the roof, what minimum...Ch. 50 - What is the acceptable method for communicating...Ch. 50 - Prob. 9RQCh. 50 - Prob. 10RQ
Ch. 50 - The most efficient way to establish the best...Ch. 50 - Free-cooling can be accomplished if the
A....Ch. 50 - Prob. 13RQCh. 50 - Prob. 14RQCh. 50 - Explain why the outside air damper is typically...Ch. 50 - Briefly explain the purpose of ASHRAE Standard 62.Ch. 50 - Explain the concept of demand control ventilation.Ch. 50 - Explain how carbon dioxide levels can be used to...Ch. 50 - Describe the blowers used on VAV systems.Ch. 50 - A cooling-only VAV box has all of the following...Ch. 50 - Which of the following is true regarding a reheat...Ch. 50 - Variable refrigerant flow systems sense the...Ch. 50 - The acronym PID stands for ______, _____, and...Ch. 50 - Explain the main benefit of a heat-recovery VRF...Ch. 50 - The pump on a dry cooler can direct water to...Ch. 50 - During low ambient conditions, the space cooling...
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- While discussing relative humidity: Technician A says that the amount of moisture that air can hold is directly related to the temperature of the air. Technician B says that the colder the air is, the more moisture it can hold. Who is correct?arrow_forwardGive three(3 each) specific important safety precautions in handling the following gadgets/devices: 1. heater 2. Air conditioner 3. computer systemarrow_forwardFLAKABLE LIQUID 3. One precaution that needs to be foliowed in a work area displaying the sign shown above is wear a leather apron. b. avoid using solvents. C. wear rubber gloves. d. prohibit welding. a.arrow_forward
- What should be done in the case of a personal injury emergency?arrow_forwardPlz answer it with proper explanationarrow_forwardWhich of the following systems generate more energy when used in industrial applications? a. pneumatic systems b. hydraulic systems c. none of the listed d. both systems generate same energyarrow_forward
- Which of the following set entirely comprises a measurement system? A. Thermometer, odometer, ultrasonic sensor C. Espresso machine, light sensor, accelerometer B. Dish washer, espresso machine, thermometer D. Calculator, accelerometer, temperature sensorarrow_forwardto run d. both a and b 44. Ifa thermostatic expansion valve's thermal bulb came loose from the suction line at the outlet of the evaporator, whích of the following could result? The bulb pressure would increase and the c. thermostatic expansion valve would open. b. The superheat in the evaporator would decrease. a. Liquid refrigerant would flow back to the compressor. d. All of the above are correct. 45. If the thermal bulb assembly develops a leak, what will occur? All of the system's refrigerant will leak a. The valve will open to allow more c. refrigerant to flow. d. It will have no effect on system operation. out. b. The bulb pressure will reduce and the valve will close. 46. The purpose of an externally equalized thermostatic expansion valve is to compensate for excessive evaporator pressure drop b. allow system to equalize faster a. prevent the expansion valve from frosting up d. c. allow refrigerant to expand in the compressor 47. The primary function of an expansion device is…arrow_forwardWhat is required for a combustile mixture A. OXYGEN B. FUEL C. WATER PUT CHECK MARK OR CROSS MARK TO THE LETTERarrow_forward
- Give me correct options with explanation please solve all questions thanksarrow_forwardWhich of the following components is NOT a type of ventilation system? Select one: a. Airconditioning Units b. Venting Skylight c. Boilers d. Exhaust Fansarrow_forwardTrue or False: City water does not contain air.arrow_forward
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