Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN: 9781337399128
Author: Russell E. Smith
Publisher: Cengage Learning
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Textbook Question
Chapter 3, Problem 19RQ
Why are series-parallel control circuits important in the circuitry used in air-conditioning equipment?
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Chapter 3 Solutions
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
Ch. 3 - What is a series circuit?Ch. 3 - What is a control circuit?Ch. 3 - Safety devices in an electrical circuit are...Ch. 3 - How are series circuits used in air-conditioning...Ch. 3 - Why are series circuits used for most control...Ch. 3 - The current draw in a series circuit is _____. a....Ch. 3 - The voltage drop of a series circuit is _____. a....Ch. 3 - How would switches used as safety devices be...Ch. 3 - Draw a series circuit with a thermostat, a...Ch. 3 - Two identical 115-volt light bulbs connected in...
Ch. 3 - Prob. 11RQCh. 3 - Prob. 12RQCh. 3 - Parallel circuits are used in the air-conditioning...Ch. 3 - Why are parallel circuits used in the...Ch. 3 - Prob. 15RQCh. 3 - Prob. 16RQCh. 3 - If two 115-volt loads were connected in parallel...Ch. 3 - What is a series-parallel circuit?Ch. 3 - Why are series-parallel control circuits important...Ch. 3 - Draw a series-parallel circuit with one switch...Ch. 3 - What is the resistance of a parallel circuit with...Ch. 3 - What is the resistance of a parallel circuit with...Ch. 3 - What is the total ampere draw of a parallel...Ch. 3 - What is the voltage of a series circuit with four...Ch. 3 - What is the resistance of a series circuit with...
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- In a high voltage circuit,is the fan motor a power passing or power consuming device?arrow_forwardWhat are the modern applications of adaptive control in control engineering? why does car air conditioner switches on with ignition?arrow_forwardTime constant of thermocouple is 3 milliseconds. An engineer measures the temperature of water and sees that the temperature is less than the real temperature of the boiling water (100 C). How long does the engineer need to wait at least to see the 95 C? 8 milliseconds 5 milliseconds 3 milliseconds none of the given 9 milliseconds not sufficient informationarrow_forward
- Why are digital scales preferred over other types for charging refrigeration and air-conditioning systems?arrow_forwardII. Circuit Analysis The circuit below illustrates an electro-pneumatic system, answer the following questions: +34V 1 3 4 2 S2E Y1 5V Pneumatic circuit Electric circuit 1. What is the type of switch S1 and S2? 2. Is the electric circuit above direct or indirect? Explain why? 3. What is the name of the part which labeled as Y1? 4. Explain what happen when switch S1 is pressed. 5. Suggest a way to extend the cylinder, and what do you think is the application of this type of circuit? 4,arrow_forwardWhat is the heat output, in Btu/h, of a terminal unit with a T of 10F and a water flow rate of 5 gpm?arrow_forward
- Why is a low-voltage thermostat normally more accuratethan a high-voltage thermostat?arrow_forwardThe troubleshooting mechanisms after a high frequency alarm on the mechanical ventilator are 1) Increasing the pressure support, 2) Adjusting the peak flow, 3) Adjusting the FiO2. Please explain.arrow_forwardThree common controls used in central electric heat applications are thermostats, contactors (or relays), and A. capacitors. B. sequencers. C. cool anticipators.arrow_forward
- Under what conditions, an absorption machine give less cooling effect?arrow_forward1 The condenser can be part of which loop(s)? a- Airside loop b- Chilled-water loop c- Refrigeration loop d-Heat-rejection loop e-Controls loop 2 The evaporator can be part of which loop(s)? a- Airside loop b- Chilled-water loop c- Refrigeration loop d-Heat-rejection loop e-Controls loop 3 Which loop is eliminated in a direct expansion (DX) system? a- Airside loop b- Chilled-water loop c- Refrigeration loop d-Heat-rejection loop e-Controls loop 4 What are some benefits of using a "packaged" piece of cooling equipment rather than a "split" system?arrow_forwardWhich of the following will be useful for modelling the process in an air conditioning unit O No-flow Energy Equation O Steady Flow Energy Equation O Fourier's Law O Newton's law of coolingarrow_forward
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