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24 Cards in this Set
- Front
- Back
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Circuit control devices should NOT be used for which of the following reasons? |
To remove power from a malfunctioning device
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Which of the following are types of circuit control devices?
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Relays, Switches, Solenoids
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Which of the following is a manual switch?
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A light switch
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Which of the following is an automatic switch?
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A switch that turns on a light in a refrigerator
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Control or selection of one or more circuits is a function of which of the following switches?
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A multicontact switch
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A switch actuator is described by which of the following terms?
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Toggle
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What is the maximum number of different single-pole, single throw switch positions possible?
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One
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What is the maximum number of different single-pole, double throw switch positions possible?
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Two
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Control of a circuit requiring a temporary actuation signal is provided by which of the following switches?
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Momentary
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To guard against the accidental actuation of a circuit, which of the following types of switches are used?
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Locked-out
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To guard against the accidental turning off of a circuit, which of the following types of switches are used?
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Locked-in
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What is the common name for an accurate snap-acting switch?
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Microswitch
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Designation of switch current rating is based on which of the following current values?
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Maximum
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Designation of switch voltage rating is based on which of the following voltage values?
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Maximum
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Checking a switch with the circuit power NOT applied is accomplished by using which of the following meters?
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Ohmmeter
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Checking a switch with the power applied is accomplished by using which of the following meters?
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Voltmeter
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When you perform preventive maintenance on a switch, which of the following items should be checked?
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-The terminals for corrosion
-The physical condition of the switch -The switch operation for smooth and correct operation |
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A solenoid is based upon which of the following principles?
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A coil attracts a soft iron core when current flows in the coil
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A solenoid is commonly used in which of the following devices?
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A starter for a motor vehicle
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If a solenoid is not operating properly, which of the following items need NOT be checked?
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Coil
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If a relay is hermetically sealed with an opaque cover, which of the following methods should be used to determine whether the relay is operating?
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Place your finger on the cover and feel the relay contact movement
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If a relay is NOT operating properly, which of the following items need NOT be checked?
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The armature resistance
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What should be used to clean the contacts of a relay?
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A burnishing tool
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What should be used to adjust contact clearances on a relay?
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A point bender |
