Question 1

The voltmeter indicates the amount of potential between two points in much the same way a(n) ________.

Accepted Answer

A) thermometer indicates the temperature difference between two points 
B) ammeter indicates the current difference between two points 
C) tachometer measures the revolutions per minute of a revolving shaft 
D) pressure gauge indicates the pressure difference between two points 
A) thermometer indicates the temperature difference between two points 
B) ammeter indicates the current difference between two points 
C) tachometer measures the revolutions per minute of a revolving shaft 
D) pressure gauge indicates the pressure difference between two points D

Question 2

Bimetal strip type overload relays can often be adjusted for a higher setting to offset the problem of___________ .

Accepted Answer

A) low noise 
B) ambient temperature 
C) moisture 
D) excessive wind 
A) low noise 
B) ambient temperature 
C) moisture 
D) excessive wind B

Question 3

Plunger-type voltage testers are high-impedance devices and require several milliamperes to operate.

Accepted Answer

A) True 
 B)False  False

Question 4

It is virtually impossible to troubleshoot a circuit without a working knowledge of schematics.

Accepted Answer

A) True 
 B)False

Question 5

Overload relays are intended to disconnect the motor from the power line in the event____________ .

Accepted Answer

A) that the motor nameplate is destroyed 
B) the timing relays cut out the starting resistors 
C) that the current draw becomes excessive 
D) of a voltage unbalance 
A) that the motor nameplate is destroyed 
B) the timing relays cut out the starting resistors 
C) that the current draw becomes excessive 
D) of a voltage unbalance

Question 6

As a generally rule, it is easier to progress backward though the circuit until the problem is identified.

Accepted Answer

A) True 
 B)False

Question 7

It is often necessary to troubleshoot a circuit with power applied to the circuit.

Accepted Answer

A) True 
 B)False

Question 8

When using an ohmmeter, make certain that the power is connected to the circuit.

Accepted Answer

A) True 
 B)False

Question 9

A good way to disconnect the power in most control circuits is to remove the___________ .

Accepted Answer

A) control transformer fuse 
B) motor from the line 
C) autotransformers from the line 
D) braking pressure smoothly 
A) control transformer fuse 
B) motor from the line 
C) autotransformers from the line 
D) braking pressure smoothly

Question 10

The total or applied voltage in a series circuit must _______________the sum of the voltage drops across each component.

Accepted Answer

A) equal 
B) be below 
C) approximate 
D) be above 
A) equal 
B) be below 
C) approximate 
D) be above

Exam 60: Troubleshooting Techniques

The voltmeter indicates the amount of potential between two points in much the same way a(n) ________.

Bimetal strip type overload relays can often be adjusted for a higher setting to offset the problem of___________ .

Plunger-type voltage testers are high-impedance devices and require several milliamperes to operate.

It is virtually impossible to troubleshoot a circuit without a working knowledge of schematics.

Overload relays are intended to disconnect the motor from the power line in the event____________ .

As a generally rule, it is easier to progress backward though the circuit until the problem is identified.

It is often necessary to troubleshoot a circuit with power applied to the circuit.

When using an ohmmeter, make certain that the power is connected to the circuit.

A good way to disconnect the power in most control circuits is to remove the___________ .

The total or applied voltage in a series circuit must _______________the sum of the voltage drops across each component.

General Principles of Electric Motor Control

Fractional and Integral Horsepower Manual Motor Starters

Magnetic Starters

Symbols

Interpretation and Application of Simple Wiring and Elementary Diagrams

Push Buttons and Control Stations

Relays

Contactors

Timing Relays

Pressure Switches and Regulators

Float Switches

Flow Switches

Limit Switches and Proximity Control

Phase Failure Relays

Solenoid Valves

Temperature Switches

Two-Wire Controls

Three-Wire and Separate Controls

Hand-Off Automatic Controls

Multiple Push-Button Stations

Interlocking Methods for Reversing Control

Sequence Control

Jogging Inching Control Circuits

Time-Delay Low-Voltage Release Relay

The Motor and Starting Methods

Primary Resistor-Type Starters

Autotransformer Starters

Part Winding Motor Starters

Automatic Starters for Star-Delta Motors

Ac Solid-State Reduced Voltage Controller

Controllers for Two-Speed Two-Winding 28separate Winding29 Motors

Two-Speed One-Winding 28consequent Pole29 Motor Controller

Four-Speed Two-Winding 28consequent Pole29 Motor Controller

Wound Rotor Motors and Manual Speed Control

Push-Button Speed Selection

Automatic Acceleration for Wound Rotor Motors

Automatic Speed Control for Wound Rotor Motors

Solid-State Adjustable Speed Controller for Ac Wound Rotor Motors

Synchronous Motor Operation

Push-Button Synchronizing

Timed Semiautomatic Synchronizing

Synchronous Automatic Motor Starter

About Dc Motors

Use of Reduced Voltage for Starting

Across-The-Line Starting

Compensating and Definite Time Control Starting

Solid-State Adjustable Speed Control

Plugging

Electric Brakes

Dynamic and Regenerative Braking

Electric and Electronic Braking

Direct Drives and Pulley Drives

Gear Motors

Variable-Frequency Mechanical Drives

Ac Adjustable Frequency Drives

Magnetic Clutch and Magnetic Drive

Dc Variable-Speed Control 14motor Drives

Programmable and Motion Control

Motor Startup and Troubleshooting Basics

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