Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Chapter 27, Problem 2ASRQ
To determine
The technician with correct approach.
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Technician A checks a starter’s field coils for opensby connecting an ohmmeter between the coils’power feed wire and the field coil brush lead. TechnicianB checks a starter’s field coil for a short toground by connecting an ohmmeter across the fieldcoil brush lead and the starter housing. Who iscorrect?a. Technician Ab. Technician Bc. Both A and Bd. Neither A nor B
A starter cranks, but cranks slowly. The shop performs a voltage drop on the ground and power side of the starter circuit and they both test good. Technician A says the battery may be bad. Technician B says the starter may be bad. Who is correct?
AHO LUI
3. True or false? A magnetic field opposing the
stator's magnetic field is produced in a
motor's rotor by a process called induced
magnetism.
Chapter 27 Solutions
Automotive Technology
Ch. 27 - Prob. 1SACh. 27 - Name the three types of trace pattern display...Ch. 27 - Prob. 3SACh. 27 - List at least two methods of checking the...Ch. 27 - Prob. 5SACh. 27 - What is the typical procedure for checking the...Ch. 27 - What does a slope in the spark line represent?Ch. 27 - What happens if one of the ground electrodes of a...Ch. 27 - True or False? The first test when checking a...Ch. 27 - True or False? Coil secondary resistance is...
Ch. 27 - True or False? On some engines, if the gap between...Ch. 27 - Richer air-fuel mixtures. a. decrease the...Ch. 27 - While checking a pickup coil with an ohmmeter, a...Ch. 27 - A CKP sensor can be checked with all of the...Ch. 27 - Which of the following will cause one or more, but...Ch. 27 - Prob. 1ASRQCh. 27 - Prob. 2ASRQCh. 27 - Prob. 3ASRQCh. 27 - Technician A says that EMI can affect sensor...Ch. 27 - While discussing waste spark EI systems:...Ch. 27 - While discussing how to test a Hall-effect...Ch. 27 - While discussing the possible causes for a...Ch. 27 - Prob. 8ASRQCh. 27 - While discussing EI service and diagnosis:...Ch. 27 - While discussing engine misfire diagnosis:...
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- An open winding or a shorted winding can be determined with which of the following instruments? A. Voltmeter B. Ammeter C. Ohmmeterarrow_forwardTechnician A says that a faulty radiator fan relay can cause an engine to overheat. Technician B says that bidirectional control is NOT used to test an electric cooling fan. Who is correct? Select one: a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forwardWhich of the following is not part of the starter motorcircuit?a. Batteryb. Starting safety switchc. Starter motord. Relay solenoidarrow_forward
- A pneumatic power system will usually have a return line a. True b. Falsearrow_forwardTechnician A says that many vehicles use an AC generator as the charging unit. Technician B says that all vehicles use an alternator as the charging unit. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor Barrow_forwardAn engine cranks slowly: Technician A says that a possible cause of the problem is poor starter circuit connections. Technician B says that an engine problem could be the cause. Who is correct?arrow_forward
- What happens when the low-voltage current flow inthe coil primary winding is interrupted by the switchingdevice?a. The magnetic field collapses.b. A high-voltage is induced in the coil secondarywinding.c. Both a and b.d. Neither a nor barrow_forwardThe circuit breaker at a power seat motor continuously trips: Technician A says that this could be caused by a seat track problem that is causing mechanical resistance. Technician B says that this could be caused by corrosion at the motor, which is causing electrical re-sistance. Who is correct?arrow_forwardWhat instrument is generally used to test an armature for a shorted winding?arrow_forward
- Technician A says that installing a thermostat incorrectly can cause the housing to break. Technician B says that it is OK to install a thermostat in either direction. Who is correct? Select one: a. Technician A only b. Technician B only C. Both A and B d. Neither A nor Barrow_forwardVoltage can be described as ____________ .arrow_forwardThe firing lines on an oscilloscope pattern are all abnormally low. Technician A says that the problem is probably low coil output. Technician B says that the problem could be an overly lean air-fuel mixture. Who is correct? Select one: a. Technician A b. Technician B c. Both A and B d. Neither A nor Barrow_forward
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