F.a-The best method of performing pneumatic system inspection is with a(n) A. ultrasonic listening device. B. vibration listening device. C. screwdriver to your ear. D. careful eye on system operation.

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter10: Contactors, Relays, And Overloads

Section: Chapter Questions

Problem 26RQ

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Concept explainers

Solenoids

A solenoid is a common term for a telephone coil used as an electromagnet. It also refers to any device that uses a solenoid to convert electrical energy into mechanical energy. The device generates a magnetic field from an electric field and uses the magnetic field to produce precise motion. Solenoid valves are often used to change power, such as in-car transmitters or valves, such as in the fuel system.

Question

100%

F.a-The best method of performing pneumatic system inspection is with a(n)
A. ultrasonic listening device.
B. vibration listening device.
C. screwdriver to your ear.
D. careful eye on system operation.
F.b- What type of seal system is constructed of a hard brittle material and is often used in a pump to seal
between the pump and the motor?
A. Steel
B. Fiberglass
C. Ceramic
D. Glass
F.c- When a pneumatic solenoid fails, the failure is normally due to a
A. weak pilot.
B. bad spool.
C. ripped seal.
D. faulty coil.

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