Question 1

Manual starters are characterized by the fact that the operator must go to the location of the starter to initiate any change of action.

Accepted Answer

A) True 
 B)False  True

Question 2

Electronic overload relays employ a current ____ to sense the motor current.

Accepted Answer

A)  diode 
B)  transformer 
C)  capacitor 
D)  varistor 
A)  diode 
B)  transformer 
C)  capacitor 
D)  varistor B

Question 3

Discuss the differences between two- and three-load contact manual push-button starters.

Accepted Answer

Manual push-button line voltage starters are manufactured with two or three load contacts. The two-contact models are intended to control single-phase motors that operate on 240 volts, or direct current motors. The starters that contain three contacts are intended to control three-phase motors. Push-button type manual starters are integral, not fractional, horsepower starters. Generally, they can control single-phase motors rated up to 5 horsepower, direct current motors up to 2 horsepower, and three-phase motors up to 10 horsepower.

Question 4

What enclosures are available for fractional horsepower starters?

Accepted Answer

Like larger starters, fractional horsepo

Question 5

When using a sensing pilot device to directly control the operation of a motor, you must make sure that the type of pilot device is equipped with contacts that can handle the rated current of the motor. These devices are generally referred to as "____________________" devices.

Accepted Answer

The answer of When using a sensing pilot device to...

Question 6

What determines the amount of warp in a bimetal strip overload relay?

Accepted Answer

The amount of warp is determin

Question 7

Manual starters that are installed in a(n) ____________________ inside a wall are especially susceptible to ambient temperature problems.

Accepted Answer

The answer of Manual starters that are installed in a(n)...

Question 8

Overloads are designed to protect the circuit from a short-circuit condition.

Accepted Answer

A) True 
 B)False

Question 9

Anytime a motor has tripped on overload, the electrician should check the motor and circuit to determine why the overload tripped. The first step is generally to ____.

Accepted Answer

A)  determine if the motor is actually overloaded 
B)  put the motor back into operation 
C)  lower the air temperature 
D)  replace the insulation 
A)  determine if the motor is actually overloaded 
B)  put the motor back into operation 
C)  lower the air temperature 
D)  replace the insulation

Question 10

Three-phase motors must have an overload sensor (heaters or magnetic coils) in two of the three-phase lines.

Accepted Answer

A) True 
 B)False

Question 11

All overload relays contain a set of normally ____________________ contacts.

Accepted Answer

The answer of All overload relays contain a set of...

Question 12

There are two major types of overload relays: thermal and ____.

Accepted Answer

A)  circuit 
B)  metallic 
C)  magnetic 
D)  electric 
A)  circuit 
B)  metallic 
C)  magnetic 
D)  electric

Question 13

How can you protect large horsepower motors?

Accepted Answer

Large horsepower motors often have curre

Manual starters are characterized by the fact that the operator must go to the location of the starter to initiate any change of action.

Electronic overload relays employ a current ____ to sense the motor current.

Discuss the differences between two- and three-load contact manual push-button starters.

What enclosures are available for fractional horsepower starters?

When using a sensing pilot device to directly control the operation of a motor, you must make sure that the type of pilot device is equipped with contacts that can handle the rated current of the motor. These devices are generally referred to as "____________________" devices.

What determines the amount of warp in a bimetal strip overload relay?

Manual starters that are installed in a(n) ____________________ inside a wall are especially susceptible to ambient temperature problems.

Overloads are designed to protect the circuit from a short-circuit condition.

Anytime a motor has tripped on overload, the electrician should check the motor and circuit to determine why the overload tripped. The first step is generally to ____.

Three-phase motors must have an overload sensor (heaters or magnetic coils) in two of the three-phase lines.

All overload relays contain a set of normally ____________________ contacts.

There are two major types of overload relays: thermal and ____.

How can you protect large horsepower motors?

General Principles of Motor Control, Symbols and Schematic Diagrams

The Control Transformer, Relays, Contactors, and Motor Starters

Timing Relays, Pressure Switches and Sensors

Float Switches, Flow Switches and Sensors

Limit Switches and Phase Failure Relays

Temperature Sensing, Devices M Solenoid and Motor Operated Valves

Hall Effect Sensors and Proximity Detectors

Basic Control Circuits and Photodetectors

Schematics, Wiring Diagrams Circuit (1), Timed Starting for Three Motors Circuit (2)

Float Switch Control of a Pump and Pilot Lights Circuit (3), Developing a Wiring Diagram Circuit (1)

Developing a Wiring Diagram Circuit (2) and Developing a Wiring Diagram Circuit (3)

Installing Control Systems and Reading Large Schematic Diagrams

Multiple Push Button Stations and Hand-Off-Automatic Controls

Forward-Reverse Control, Jogging and Inching

Dc Motors and Sequence Control

Solid-State Dc Drives and Starting Methods for DC Motors

Stepping Motors, the Motor and Starting Methods

Autotransformer Starting , Resistor and Reactor Starting for Ac Motors

Wye-Delta Starting, Part Winding Starters

Braking , Consequent Pole Motors, Variable Voltage and Magnetic Clutches

Variable Frequency Control

Troubleshooting, Motor Installation and Developing Control Circuits

Digital Logic and the Bounceless Switch

Programmable Logic Controllers and Start-Stop Push Button Control

Programming a PLC and Analog Sensing for Programmable Controllers

Filters

Exam 2: Manual Starters and Overload Relays

Manual starters are characterized by the fact that the operator must go to the location of the starter to initiate any change of action.

Electronic overload relays employ a current ____ to sense the motor current.

Discuss the differences between two- and three-load contact manual push-button starters.

What enclosures are available for fractional horsepower starters?

When using a sensing pilot device to directly control the operation of a motor, you must make sure that the type of pilot device is equipped with contacts that can handle the rated current of the motor. These devices are generally referred to as "____________________" devices.

What determines the amount of warp in a bimetal strip overload relay?

Manual starters that are installed in a(n) ____________________ inside a wall are especially susceptible to ambient temperature problems.

Overloads are designed to protect the circuit from a short-circuit condition.

Anytime a motor has tripped on overload, the electrician should check the motor and circuit to determine why the overload tripped. The first step is generally to ____.

Three-phase motors must have an overload sensor (heaters or magnetic coils) in two of the three-phase lines.

All overload relays contain a set of normally ____________________ contacts.

There are two major types of overload relays: thermal and ____.

How can you protect large horsepower motors?

General Principles of Motor Control, Symbols and Schematic Diagrams

The Control Transformer, Relays, Contactors, and Motor Starters

Timing Relays, Pressure Switches and Sensors

Float Switches, Flow Switches and Sensors

Limit Switches and Phase Failure Relays

Temperature Sensing, Devices M Solenoid and Motor Operated Valves

Hall Effect Sensors and Proximity Detectors

Basic Control Circuits and Photodetectors

Schematics, Wiring Diagrams Circuit (1), Timed Starting for Three Motors Circuit (2)

Float Switch Control of a Pump and Pilot Lights Circuit (3), Developing a Wiring Diagram Circuit (1)

Developing a Wiring Diagram Circuit (2) and Developing a Wiring Diagram Circuit (3)

Installing Control Systems and Reading Large Schematic Diagrams

Multiple Push Button Stations and Hand-Off-Automatic Controls

Forward-Reverse Control, Jogging and Inching

Dc Motors and Sequence Control

Solid-State Dc Drives and Starting Methods for DC Motors

Stepping Motors, the Motor and Starting Methods

Autotransformer Starting , Resistor and Reactor Starting for Ac Motors

Wye-Delta Starting, Part Winding Starters

Braking , Consequent Pole Motors, Variable Voltage and Magnetic Clutches

Variable Frequency Control

Troubleshooting, Motor Installation and Developing Control Circuits

Digital Logic and the Bounceless Switch

Programmable Logic Controllers and Start-Stop Push Button Control

Programming a PLC and Analog Sensing for Programmable Controllers

Filters