Question 1

What happens when the hand-off-automatic switch is set in the Hand position?

Accepted Answer

When the hand-off-automatic switch is set in the Hand position, connection is made between terminals 1 and 2. This permits the motor to be controlled by a start-stop push-button station. In this mode, the fan will run continuously until the Stop button is pressed.

Question 2

When the M coil energizes, what happens to the normally open auxiliary contact?

Accepted Answer

When the M coil energizes, the normally open auxiliary contact connected in parallel with the two Start buttons closes to maintain the circuit to M coil when the Start button is released.

Question 3

A(n) ____________________ lamp indicates that there is no flow of water when the circuit is energized.

Accepted Answer

warning

Question 4

When M coil energizes, all M contacts ____.

Accepted Answer

A)  de-energize 
B)  change position 
C)  stay where they are 
D)  connect in parallel 
A)  de-energize 
B)  change position 
C)  stay where they are 
D)  connect in parallel

Question 5

After wire numbers are placed on the schematic, corresponding numbers are placed on the control components.

Accepted Answer

A) True 
 B)False

Question 6

A flow switch can be used to detect the flow of water to ensure that a fan motor cannot run if there is no flow of cooling water.

Accepted Answer

A) True 
 B)False

Question 7

A(n) ____________________ line indicates that two switches are mechanically connected.

Accepted Answer

The answer of A(n) ____________________ line indicates that two switches...

Question 8

One terminal of both a normally open switch and normally closed switch are connected together. This forms a common point for both switches and could be used as the common terminal for a flow switch that contains a ____ switch.

Accepted Answer

A)  single-pole double-throw 
B)  single-pole single-throw 
C)  double-pole single-throw 
D)  double-pole double-throw 
A)  single-pole double-throw 
B)  single-pole single-throw 
C)  double-pole single-throw 
D)  double-pole double-throw

Question 9

When a component is used to perform the function of stop in a control circuit, it will generally be a normally ____ component and be connected in ____ with the motor starter coil.

Accepted Answer

A)  open; series 
B)  open; parallel 
C)  closed; series 
D)  closed; parallel 
A)  open; series 
B)  open; parallel 
C)  closed; series 
D)  closed; parallel

Question 10

Hand-off-automatic controls are used to prevent an operator from selecting between automatic or manual operation of a motor.

Accepted Answer

A) True 
 B)False

Question 11

When the HOA switch is placed in the Auto position, a(n) ____ controls the action of the fan.

Accepted Answer

A)  push-button 
B)  thermostat 
C)  operator 
D)  flow switch 
A)  push-button 
B)  thermostat 
C)  operator 
D)  flow switch

Question 12

Consider a circuit needing a flow switch with two separate contacts, one normally open and the other normally closed. When one switch changes position, the other switch changes position. What happens if a flow switch with two separate switches cannot be obtained?

Accepted Answer

If a flow switch with two separate switc

Question 13

When the M coil energizes, what happens to the load contacts?

Accepted Answer

When the M coil energizes, the

What happens when the hand-off-automatic switch is set in the Hand position?

When the M coil energizes, what happens to the normally open auxiliary contact?

A(n) ____________________ lamp indicates that there is no flow of water when the circuit is energized.

When M coil energizes, all M contacts ____.

After wire numbers are placed on the schematic, corresponding numbers are placed on the control components.

A flow switch can be used to detect the flow of water to ensure that a fan motor cannot run if there is no flow of cooling water.

A(n) ____________________ line indicates that two switches are mechanically connected.

One terminal of both a normally open switch and normally closed switch are connected together. This forms a common point for both switches and could be used as the common terminal for a flow switch that contains a ____ switch.

When a component is used to perform the function of stop in a control circuit, it will generally be a normally component and be connected in with the motor starter coil.

Hand-off-automatic controls are used to prevent an operator from selecting between automatic or manual operation of a motor.

When the HOA switch is placed in the Auto position, a(n) ____ controls the action of the fan.

Consider a circuit needing a flow switch with two separate contacts, one normally open and the other normally closed. When one switch changes position, the other switch changes position. What happens if a flow switch with two separate switches cannot be obtained?

When the M coil energizes, what happens to the load contacts?

General Principles of Motor Control, Symbols and Schematic Diagrams

Manual Starters and Overload Relays

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

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 14: Multiple Push Button Stations and Hand-Off-Automatic Controls

What happens when the hand-off-automatic switch is set in the Hand position?

When the M coil energizes, what happens to the normally open auxiliary contact?

A(n) ____________________ lamp indicates that there is no flow of water when the circuit is energized.

When M coil energizes, all M contacts ____.

After wire numbers are placed on the schematic, corresponding numbers are placed on the control components.

A flow switch can be used to detect the flow of water to ensure that a fan motor cannot run if there is no flow of cooling water.

A(n) ____________________ line indicates that two switches are mechanically connected.

One terminal of both a normally open switch and normally closed switch are connected together. This forms a common point for both switches and could be used as the common terminal for a flow switch that contains a ____ switch.

When a component is used to perform the function of stop in a control circuit, it will generally be a normally ____ component and be connected in ____ with the motor starter coil.

Hand-off-automatic controls are used to prevent an operator from selecting between automatic or manual operation of a motor.

When the HOA switch is placed in the Auto position, a(n) ____ controls the action of the fan.

Consider a circuit needing a flow switch with two separate contacts, one normally open and the other normally closed. When one switch changes position, the other switch changes position. What happens if a flow switch with two separate switches cannot be obtained?

When the M coil energizes, what happens to the load contacts?

General Principles of Motor Control, Symbols and Schematic Diagrams

Manual Starters and Overload Relays

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

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

When a component is used to perform the function of stop in a control circuit, it will generally be a normally component and be connected in with the motor starter coil.