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17 Cards in this Set
- Front
- Back
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10-1. What type of air-conditioning system should be used when the areas to be air- conditioned are in close proximity to each other? 1. Chilled water only 2. Hat and chilled water 3. Forced air 4. Natural draft
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3. Forced air
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10-2. What type of manifold gauges are needed when working on an ammonia- absorption refrigeration system? 1. Brass 2. Cooper 3. Bronze 4. Steel
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4. Steel
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10-3. What type of evaporator system is used to preserve the freshness of fruits, vegetables, meats, and fish? 1. Spray 2. Thermoelectric 3. Eutectic 4. Evaporator
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1. Spray
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10-4. What type of refrigeration system has no moving parts? 1. Evaporator 2. Thermoelectric 3. Spray 4. Eutectic
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3. Spray
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10-5. What maximum temperature can be maintained in a cascade refrigeration system? 1. −50°F 2. −100°F 3. −150°F 4. −250°F
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1. −50°F
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10-6. What maximum temperature can be attained in a three-stage compound refrigeration system? 1. −100°F 2. −135°F 3. −150°F 4. −250°F
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2. −135°F
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10-7. When mounting a condenser on a roof, what consideration is considered the most important? 1. Noise level 2. Availability of water 3. Availability of electricity 4. Roof load strength
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4. Roof load strength
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10-8. What types of metal are used in a bimetal thermostat? 1. Tin and antimony 2. Cooper and steel 3. Brass and invar 4. Tin and steel
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3. Brass and invar
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10-9. What type of thermostat uses 24 volts? 1. Line-voltage 2. Low-voltage 3. Millivoltage 4. High-voltage
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2. Low-voltage
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10-10.What is the most commonly used metering device? 1. AEX 2. Capillary tube 3. TEV 4. Low-side float
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3. TEV
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10-11.Which of the following types of motors should be used for 5-horsepower, high- starting torque requirement? 1. Split-phase 2. Capacitor-start, capacitor-run 3. Permanent split-phase 4. Capacitor-start, induction run
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2. Capacitor-start, capacitor-run
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10-12.Which of the following components is considered a load? 1. Thermostat 2. High-pressure switch 3. Set of contacts 4. Compressor contactor
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4. Compressor contactor
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10-13.Which of the following conditions exists in the case of a shorted-winding? 1. A wire is burned in half 2. The winding has a high resistance 3. A loop of cooper wire is in contact with another wire 4. A wire is touching the hermetic shell
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3. A loop of cooper wire is in contact with another wire
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10-14.Which of the following devices can be used to test a hermetic motor for grounds? 1. Ohmmeter 2. Test lamp 3. Megger 4. All of the above
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4. All of the above
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10-15.Which of the following starting relays is capable of de-energizing the running winding circuit when the circuit draws excessive current? 1. Hot wire 2. Voltage 3. Current 4. None of the above
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1. Hot wire
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10-16.(True or False) When checking relay contacts, voltage and thermal relay contacts are normally open. 1. True 2. False
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2. False
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10-17.When testing a capacitor with an ohmmeter, what general reading on the meter indicates the capacitor is good? 1. High resistance 2. Low resistance then climbs to high resistance 3. Medium resistance 4. Low resistance
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2. Low resistance then climbs to high resistance
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