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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 30, Problem 15RQ
Power-passing devices are wired in __________(series or parallel).
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To protect electronic circuits, some voltage regulatorshave a __ circuit built into them.
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O a. Less than
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II.
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,
Chapter 30 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 30 - The material often used to manufacture electric...Ch. 30 - Portable or small space heaters with glowing coils...Ch. 30 - Baseboard heaters transfer heat by______.Ch. 30 - A disadvantage of a central forced-air electric...Ch. 30 - Three common controls used in central electric...Ch. 30 - Prob. 6RQCh. 30 - Prob. 7RQCh. 30 - Prob. 8RQCh. 30 - True or False: A package sequencer can start or...Ch. 30 - Two types of wiring diagrams are the pictorial and...
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- Power-consuming devices are wired in _____(series orparallel).arrow_forwardDefine circuit protection.arrow_forwardQuestion 07: Find y.(t) In the circuit shown in Figure 7. Note that, since the voltage input is multiplied by u((), the voltage source is a short for all t < 0 and i(0) = 0. Copyright © The McGraw-Hil Corpanes, Inc Permsson required lor reproduction or display 12 75e 2 u(1) V 2 H 2 S2 Figure 7.arrow_forward
- 8. An R-L series circuit has a reactive power of 1234 VARs and an apparent power of 4329 VA. By how many degrees are voltage and current out of phase with each other? 9. An R-L series circuit contains a resistor and an inductor. The resistor has a value of 6.5 22. The circuit is connected to 120 V and has a current flow of 12 A. What is the inductive reactance of this circuit? 10. What is the voltage drop across the resistor in the circuit in Question 9? 11. A phase angle meter connected in an R-L series circuit indicates that the current is 28 degrees out of phase with the voltage. What is the circuit power factor? 12. An R-L series circuit has a power factor of 73%. If the apparent power is 560 kVA, what is the true power in the circuit?arrow_forwardName Section 5-2: Line Diagrams-Signals, Decisions, and Actions In the following application, a temperature switch controls a heating contactor and a flow switch is used to ensure there is enough air flow. If there is not enough air flow, an alarm is sounded. Complete the required information. 1. List all the signal devices in the circuit. 2. List all the action devices in the circuit. 3. List the decision part of the circuit that automatically sounds the alarm if there is a problem. 4. When the heating element is on during normal operation, is the flow switch open or closed? CIRCULATING 2 L1 FAN TEMPERATURE SWITCH TR HEATING ELEMENTS FLOW SWITCH -HOT AIR PADDLE AIR FILTER NORMALLY CLOSED FLOW SWITCH 65 ALARM (SOUNDS IF NO FLOW FOR 15 SECONDS OR MORE) Date HEATING CONTACTOR TR ON-DELAY TIMER SUPPLY AIR COLD AIR (3) TIME SET= 15 SEC © 2014 American Technical Publishers, Inc. All rights reservedarrow_forwardAir-cooled condensers and cooling towers can be cooled by a propeller fan Select the correct response: True Falsearrow_forward
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