Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Chapter 42, Problem 9RQ
To determine
The value of voltage indicated in the meter.
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QUESTION 27
Pneumatic timers have better repeat accuracy that electronic timers.
True
False
What does the voltage measurement across the conductor indicate?
HAL
3.01 v
The wire has high resistance.
The wire is okay.
The wire is open.
The wire condition can't be determine.
QUESTION 25
Pneumatic timers use a diaphragm and operate on the principle of air displacement.
True
False
Chapter 42 Solutions
Understanding Motor Controls
Ch. 42 - What are the three main electrical test...Ch. 42 - What is the advantage of a plunger type voltage...Ch. 42 - A motor is tripping out on overload. The motor...Ch. 42 - A motor is tripping out on overload. The motor...Ch. 42 - Prob. 5RQCh. 42 - Refer to the circuit shown in Figure 42–17. Assume...Ch. 42 - Prob. 7RQCh. 42 - Refer to the circuit shown in Figure 4221. Assume...Ch. 42 - Prob. 9RQCh. 42 - Refer to the circuit shown in Figure 42–21. Assume...
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- Another term used to describe sensitivity in electronic controls is A. temperature. B. gain. C. rpm. D. pressure.arrow_forwardIllustrate the following Instruments with parts label: A. Screw pitch gauge B. Radius gauge C. Wire gauge Below each illustration, give a brief discussion on the usage, function and safety precaution.arrow_forwardRefer to the circuit shown in Figure 5-29. Is the thermostat contact normally open, normally closed, normally closed held open, or normally open held closed? Figure 5-29 The contactor contains both load and auxiliary contacts.arrow_forward
- Examine the circuit shown below and answer the following questions: 1. How is the cylinder 3A (towards the right) fundamentally different than cylinders 1A and 2A? 2. Describe 5 key features (ways, actuator, etc.) of the directional control valve 1V1. 3. Describe 5 key features of directional control valve 3V. 4. What type of device is 1V2? 5. Here's a close up of 1V2. Is it metering-in or metering-out? How do you know? 6. Empty triangle shapes appear in many places in this schematic. What do they represent? 1A 181 182 2A 282 3A 281 381 WWE 1V2 1V3 2V2 2V3 1V1 2V1 2Y1H svos H2Y2 3Y1 V 1V3 OV] OY1 211AM OZarrow_forwardWhile discussing the circuit shown in Figure 15-66: Technician A says that the total resistance of the circuit is 1 ohm. Technician B says that the current flow through the 6-ohms of resistance is 12 amps. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor Barrow_forwardSignals can have varying voltage levels.arrow_forward
- While measuring the resistance of a wire with an ohmmeter: Technician A says that if low resistance is shown on the meter, the wire is shorted. Technician B says that if no resistance is measured, the wire is shorted. Who is correct? Technician A Technician B Both A and B d. Neither A nor Barrow_forwardIf there were a current flowing of 5A in a 120-V circuit,what would the resistance be? A. 25 B. 24 c. 600 D. 624arrow_forward**ONLY FIRST ATTEMPT **there will be three circuits in series (2 for conv and 1 for cond)arrow_forward
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