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 6, Problem 4RQ
Schematic diagrams break the wiring of control systems down into a(n) _____ arrangement.
- a. circuit-by-circuit
- b. series circuit
- c. individual circuit
- d. none of the above
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A major disadvantage of on/off control is that it cannot work for applications requiring very small changes from the set point (sp)
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Chapter 6 Solutions
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
Ch. 6 - Why should an air-conditioning technician learn to...Ch. 6 - Briefly explain the layout of a schematic diagram.Ch. 6 - Most schematic diagrams are made up of _____. a....Ch. 6 - Schematic diagrams break the wiring of control...Ch. 6 - Draw the symbols for the following components. a....Ch. 6 - What is the name of an appliance that is used to...Ch. 6 - What is the position of the control switch if the...Ch. 6 - Prob. 8RQCh. 6 - True or False: The evaporator fan motor is...Ch. 6 - What electrical component initiates the defrost...
Ch. 6 - The thermostat of the commercial freezer in Figure...Ch. 6 - What is the purpose of the fan switch in Figure...Ch. 6 - If the temperature in the furnace schematic shown...Ch. 6 - What is the purpose of the transformer in Figure...Ch. 6 - True or False: The system in Figure 6.28 is using...Ch. 6 - The HP and LP switches are connected in __________...Ch. 6 - The contactor is controlled by __________. a. the...Ch. 6 - With the fan switch in the on position, the indoor...Ch. 6 - The compressor and condenser fan motor start...Ch. 6 - The compressor and condenser fan motor are...Ch. 6 - Prob. 21RQCh. 6 - Prob. 22RQCh. 6 - Explain why the lockout relay coil energizes...Ch. 6 - True or False: The first- and second-stage cooling...Ch. 6 - True or False: A two-stage cooling thermostat...Ch. 6 - What is the purpose of the defrost cycle of a heat...Ch. 6 - What two factors initiate the defrost mode in the...Ch. 6 - What type of thermostat is used with the heat pump...Ch. 6 - Explain the operation of the switchover valve and...Ch. 6 - The reversing-valve solenoid is energized on the...Ch. 6 - The defrost cycle of the heat pump schematic in...Ch. 6 - What is a pump-down system and why is it used in...
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- Bohar model Gizmo answer keysarrow_forwardQUESTION 13 The symbol shown below represents a component which can fully control: Single Acting Cylinder Double Acting Cylinder Both, Double Acting cylinder and single acting cylinder O Non of the abovearrow_forward5-c)Explain the role of feed back signal and error signal in a closed-loop control systemarrow_forward
- In _______________________________ type control system ,the comparison and control are done by using digital devices. a. Direct Digital Control b. Numerical Control c. Distributed Control System d. Sequential Controlarrow_forwarda. Draw the circuit diagram for Wheat stone bridge. b. Write all the equations for balanced condition for the above diagram. c. Explain the operation of Wheat stone bridge.arrow_forward24- Identify the output device which is connected to a controller in which all the control actions are performed by a microcontroller. a. Strain gauge b. Valve c. LVDT d. Proximity switcharrow_forward
- The by pass control circuit is otherwise called as O a. bleed off circuit O b. meter-in-circuit O c. secondary control circuit O d. primary control circuitarrow_forwardWhich of the following is not a characteristic ofparallel circuits?a. Total circuit resistance is always less thanthe resistance of the leg with the lowest totalresistance.b. The current through each leg will be differentif the resistance values are different.c. The sum of the resistance in each leg equalsthe total circuit resistance.d. Source voltage will be dropped across eachleg of the parallel circuit.arrow_forwardTrue or False? In a high-speed CAN system, a serial data bus is used to allow communication between the various control modules in a vehicle.arrow_forward
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