Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Textbook Question
Chapter 5, Problem 13RQ
When energizing or de-energizing a combination starter what safety precaution should always be taken?
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When the starter spins but does not crank the engine,which of the following may be true?a. Defective starter relayb. Damaged flywheel teethc. A faulty starter solenoidd. All of the above
Which of the following is not part of the starter motor circuit?
What happens when the low-voltage current flow in the coil primary winding is interrupted by the switching device?
The primary winding delivers a high-voltage spark to the plugs.
The magnetic field in the coil primary builds.
The secondary voltage drops to zero volts.
High voltage is induced in the secondary windin
Chapter 5 Solutions
Understanding Motor Controls
Ch. 5 - Prob. 1RQCh. 5 - Prob. 2RQCh. 5 - Explain the difference between auxiliary contacts...Ch. 5 - Prob. 4RQCh. 5 - What is optoisolation and what is its main...Ch. 5 - What pin numbers are connected to the coil of an...Ch. 5 - An 11-pin control relay contains three sets of...Ch. 5 - What is the purpose of the shading coil?
Ch. 5 - Refer to the circuit shown in Figure 5-29. Is the...Ch. 5 - What is the difference between a motor starter and...
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- When the starter spins but does not crank the engine, which of the following may be true? Defective starter relay Damaged flywheel teeth A faulty starter solenoid All of the abovearrow_forwardWhy is it necessary to permit a solder melting type of overload relay to cool for two to three minutes after it has tripped?arrow_forwardHow do you check for an open armature winding?arrow_forward
- Which of the following steam traps is preferred primarily for plate and tube coils operating under constant pressure?arrow_forwardWhat is the difference between a motor starter and a contactor?arrow_forwardWhy is the procedure for checking the resistance of awaste spark ignition coil different from the proceduresfor checking other types of ignition coils?arrow_forward
- An open winding in an electric motor means that A. the winding is making contact with the motor frame. B. one winding is making contact with another winding. C. a wire in one winding is broken. D. the centrifugal switch to the start winding is open.arrow_forwardThe load on the outdoor coil influenced by? -The location of the indoor coil -The outdoor temperature and the evaporator heat load -the voltage supplied to the unit -all the above factorsarrow_forwardA control circuit voltage drop test shows a 1.1 volt drop at the starter S terminal. Which of the following could be the cause? High resistance in the solenoid switch circuit High resistance in the clutch safety switch Loose battery cable connection Short in the starter armature windingsarrow_forward
- Which of the following is not part of the starter motor circuit? Battery Starting safety switch Starter motor Relay solenoidarrow_forwardWhat is the purpose of the shading coil?arrow_forwardIf the solenoid clicks while trying to crank the engine with the starter, which of the following is not a probable cause? A faulty neutral safety switch Low battery voltage Low voltage available to the solenoid An open in the hold-in windingarrow_forward
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Mechanical Design (Machine Design) Clutches, Brakes and Flywheels Intro (S20 ME470 Class 15); Author: Professor Ted Diehl;https://www.youtube.com/watch?v=eMvbePrsT34;License: Standard Youtube License