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EETC 2311 Power Technology Mid-Term Review

Total questions: 112

Worksheet time: 1hrs 1mins

Name
Class
Date
1.

The waveform that is produced by alternating current looks like a what?

a)

Sine Wave

b)

Longitudinal Wave

c)

Cosine Wave

d)

Transverse Wave

2.

Which of the following is a device that converts rotational mechanical energy into electrical energy in the form of direct current.

a)

One-Phase AC Motor

b)

Three-Phase AC Motor

c)

DC Generator

d)

Armature Generator

3.

Which of the following is common components of a permanent capacitor motor?

a)

Armature

b)

Start Windings

c)

Magnetic Field

d)

Shunt Windings

4.

Which of the following is common components of a permanent capacitor motor?

a)

Run Windings

b)

Shunt Configuration

c)

AC Wiring

d)

Armature

5.

Which of the following is common components of a permanent capacitor motor?

a)

Magnetic

b)

Capacitor

c)

Shunt Wiring

d)

Magnetic Windings

6.

Which of the following is a disadvantage of a permanent capacitor motor?

a)

Low Starting Torque

b)

High Starting Torque

c)

Less Expensive

d)

Very Expensive

7.

What is the power used by a load?

a)

AC Power

b)

DC Power

c)

Watt Power

d)

Active Power

8.

AC electricity flowing in a particular wire is called a what?

a)

Current

b)

Phase

c)

Conductor

d)

Voltage

9.

The ______ and the ______ of a DC generator rectify the output of the generators.

(a)  

10.

The frequency of the AC electricity in most European countries is what?

a)

20Hz

b)

50Hz

c)

80Hz

d)

100Hz

11.

Three phase AC motors can be ______ or ______.

(a)  

12.

About 95% of the AC motors used in industry are what type of motors?

a)

Synchronous

b)

Induction

c)

Three-Phase Generator

d)

DC Shunt Configuration

13.

_______ are windings connected in series with the armature windings to help reduce arcing between the commutator and brushes?

a)

Interpoles

b)

Commutator

c)

Shunt Windings

d)

Series Windings

14.

The rate at which the electrical voltage or current cycle repeats is called what?

a)

Current

b)

Hertz

c)

Voltage Drops

d)

Frequency

15.

The power that is supplied to a load by an AC power source is what?

a)

Apparent Power

b)

Three Phase Power

c)

DC Power

d)

AC Power

16.

What is one of the advantages of a permanent motor?

a)

High Ratio

b)

Low Torque

c)

Higher Efficiency

d)

High Cost

17.

What is one of the advantages of a permanent motor?

a)

Quieter Running

b)

High Torque Ratio

c)

High Cost

d)

Large Voltage

18.

What is one of the advantages of a permanent motor?

a)

Higher Maintenance Cost

b)

Low Efficiency

c)

Lower Maintenance Cost

d)

Permanent Voltage

19.

The effective value of AC voltage is also called the _________ voltage

a)

Maximum

b)

Root Mean Square

c)

AC

d)

Minimum

20.

________ can be determined by connecting the leads of a meter to the output terminals of a generator while it is rotating.

a)

Resistance

b)

Voltage

c)

Brush Polarity

d)

Torque Ratio

21.

What is the average range of slip for a squirrel cage induction motor?

a)

2-6%

b)

5%

c)

8-10%

d)

1-3%

22.

A capacitor start motor produces more starting torque than a split phase motor because the capacitor creates a larger phase between the winding current.

a)

True

b)

False

23.

_______ is a distortion of the field pole magnetic field caused by the armature winding magnetic field.

a)

Slip

b)

Magnetic Field

c)

Bruh Polarity

d)

Armature Reaction

24.

How does a squirrel cage motor get its name?

a)

Its Maximum Voltage

b)

Its Design of the Rotor

c)

Its Configuration (Three Configurations)

d)

Its Wiring (Amount of wires)

25.

The cost of electrical power is base on what?

(a)  

26.

The amount of two electrical waveforms are out of phase is measured in brush polarities.

a)

True

b)

False

27.

The amount of two electrical waveforms are out of phase is measured in degrees.

a)

True

b)

False

28.

What kind of generator is the most widely used generator configuration because it provides nearly constant voltage under varying load conditions?

a)

Compound

b)

Series

c)

AC

d)

Shunt

29.

The three phases that are fed to the stator windings of a three phase motor are how many degrees apart?

a)

25

b)

180

c)

90

d)

120

30.

A fan and a blower are applications of a what?

a)

Self-Excited Configuration

b)

Permanent Capacitor Motor

c)

Separately-Excited Configuration

d)

Three Phase Motor

31.

The phases of the three-phase power supplied by the power company are 90 degrees out of phase with each other.

a)

True

b)

False

32.

The phases of the three-phase power supplied by the power company are 120 degrees out of phase with each other.

a)

True

b)

False

33.

A series generator produces only a small voltage when ____ load is connected.

a)

No

b)

A Small

c)

A Large

34.

As the load on a series generator increases, the output voltage _____.

a)

Stays the Same

b)

Decreases

c)

Increases

35.

When two phases of electricity start and end at the same time, they are said to be out of phase.

a)

True

b)

False

36.

When two phases of electricity do not start and end at the same time, they are said to be out of phase.

a)

True

b)

False

37.

Three phase is a type of what? (If you get this wrong, then you are so dumb)

(a)  

38.

What requires an external DC sources to provide current to a shunt field winding.

a)

Shunt Wielding Generator

b)

Self-Excited Generator

c)

Separately-Excited Generator

d)

Three Phase Generator

39.

High efficiency, high power factor, and excellent speed regulation are advantages of what?

a)

Three Phase AC Motors

b)

Self-Excited Motors

c)

Separately-Excited Motors

d)

Single-Excited Motors

40.

Adding capacitors is not a method to adjust the speed of a what?

a)

Separately-Excited Motor

b)

Single-Excited Motor

c)

Three-Phase Motor

d)

Permanent Capacitor Motor

41.

Increased cost due to the addition of a capacitor is a disadvantage of a what?

a)

Capacitor-Start Motor

b)

Permanent Capacitor Motor

c)

Self-Excited Motor

d)

AC Motor

42.

The ratio of active power to apparent power in an AC circuit is called a what?

a)

Magnetic Field

b)

Wye Configuration

c)

Torque Ratio

d)

Power Factor

43.

Large conveyors, machine tools, and large pumps are applications of what type of motor?

a)

Self-Excited

b)

Three-phase

c)

Shunt

d)

Series

44.

Capacitor-start, permanent-capacitor, and split phase are all types of what motors?

a)

Single Phase AC Motors

b)

Three Phase AC Motors

c)

Single Phase DC Motors

d)

Three Phase DC motors

45.

In a split phase AC motor, the start winding is where the current starts to flow first

a)

True

b)

False

46.

The residual magnetism in the shunt field of a self excited shunt generator induces a voltage across the armature windings as the armature rotates.

a)

True

b)

False

47.

What type of motor is essentially a combination of a capacitor start and a permanent capacitor motor?

a)

Capacitor Start Capacitor Run

b)

Single Phase

c)

Multi-Purpose

d)

Series

48.

As the current draw of the load increases a self excited shunt generator, what does the output voltage do?

a)

Increases

b)

Decreases

c)

Stays the Same

d)

Instantly goes to 0

49.

For a self excited shunt generator, the size of the load determines how much of the current flows to the loads and how much flows through the shunt winding.

a)

True

b)

False

50.

A power factor of 100% is called what?

a)

Absolute Power Factor

b)

Maximum Power Factor

c)

Revolting Power Factor

d)

Unity Power factor

e)

Metalized Power factor

51.

On what type of system does the neutral conductor provide a common return path to the source of each phase?

a)

3 wire wye system

b)

4 wire wye system

c)

5 wire wye system

d)

24 wire wye system

52.

The device used on a split phase motor to disconnect the start winding when a predetermined speed has been reached is called a what?

a)

Wye Configuration

b)

Your mother

c)

DC Generator

d)

Centrifugal Switch

53.

Power tools, pumps, and small machines are applications of a what?

a)

Induced Motor

b)

Single Phase motor

c)

Capacitor Start motor

d)

Three Phase motor

54.

The main set of winding in a split phase motor is called what?

a)

Run Windings

b)

Shunt Windings

c)

Start Windings

d)

Series Windings

55.

The shunt field winding of a(n) _______ does not depend on the armature to provide its excitation current.

a)

Three Phase Generator

b)

Series Generator

c)

Separately-Excited Shunt Generator

d)

Self-Excited Shunt Generator

56.

Quiet running, high running torque, and high starting torque are advantages of what type of motor?

a)

Induction

b)

Capacitor Run

c)

Capacitor Start

d)

Capacitor start capacitor run

57.

The most common configuration used at a substation is what?

a)

Capacitor Configuration

b)

Wye Configuration

c)

Series Configuration

d)

Shunt Configuration

58.

A (a)   separates input devices to the left side and output devices to the right side of the diagram

59.

The type of signal that is carried by a wire inside an electrical panel is indicated by what?

a)

Wire Density

b)

Wire Current

c)

Wire Length

d)

Wire Insulator Color

60.

Power factor correction capacitors are rated in what?

a)

By the use of a DMM

b)

Current-Voltage-Resistance

c)

Hertz-Watt-Inductive

d)

Volts-Amperes-Reactive

61.

What is an advantage of a Split Phase Motor?

a)

Low Starting Torque

b)

Low Cost

c)

Less Resistance

d)

High Running Torque

62.

Ladder Diagrams with multiple pages use arrows and notes to indicate what?

a)

Previous and Next pages

b)

Resistance Size

c)

Voltage, Current, and Resistance

d)

Wire Length and Induction

63.

What is the most common type of capacitor motor?

(a)  

64.

A resistor that is used to reduce the sparking across the contacts of the centrifugal switch on a capacitor start motor is called what?

(a)  

65.

Most large DC generators use the ______ configuration because it provides a performance middle ground.

a)

Series

b)

Compound

c)

Shunt

d)

Three Phase

66.

A ________ generator results when the series field and shunt field are combined so that the output voltage is nearly constant regardless of load.

a)

Self-Excited

b)

Flat Compound

c)

Separately-Excited

Compound

d)

Curved Compound

67.

What type of configuration us most often used in applications where most of the loads requires three phase power and single phase power is only needed for lighting and office equipment?

a)

Delta

b)

4 wire Wye

c)

Wye

d)

Beta

68.

The speed at which the rotor/shaft of an AC motor must rotate to exactly match the speed of the rotating magnetic field is called what?

a)

Active Power

b)

Unity Power

c)

Maximum Velocity

d)

Synchronous Speed

69.

Which of the following configurations is a three phase electrical distribution configuration?

a)

Wye

b)

Series

c)

4 Line Wye

d)

Shunt

70.

The ______ designates difference enclosure types based on environmental conditions.

a)

National Electrical Manufacturers Association (NEMA)

b)

Occupational Safety and Health Administration (OSHA)

c)

Digital Multi-Meter (DMM)

d)

ORCA

71.

Wire numbers attached to wires in an electrical panel should match the wire numbers shown on the electrical print.

a)

False

b)

True

72.

The difference between the synchronous speed and the actual speed at which an AC motor will run is called what?

a)

Slip

b)

Brush Polarity

c)

Degrees

d)

Contraction

73.

What is the common value for a bleeder resistor?

a)

20K Hertz

b)

15K Ohms

c)

20K Ohms

d)

180K Ohms

74.

In a Delta system, what amount of VAC is not available?

a)

148 VAC

b)

204 VAC

c)

208 VAC

d)

240 VAC

75.

It is good practice to limit the number of connections per terminal block to three or more wires.

a)

False

b)

True

76.

________ are installed inside the electrical panels in a certain pattern according to the wiring function.

a)

Certain Cites

b)

Terminal Blocks

c)

Certain Blocks

d)

Terminal Cites

77.

The wiring diagram's left side rail should have which number?

(a)  

78.

It is good practice to limit the number of connections per terminal block to two or less wires.

a)

False

b)

True

79.

Wires that run between the control panel add operator station must enter and exit the panels through what?

a)

Terminal Blocks

b)

Terminal Cites

c)

Connection Cites

d)

Certain Cites

80.

Which of the following identifies a wire's signal type in an electrical panel?

a)

Wire Strength

b)

Wire Density

c)

Wire Number

d)

Wire Color

81.

In a Wye system, what amount of VAC is not available?

a)

240 VAC

b)

280 VAC

c)

208 VAC

d)

204 VAC

82.

When a load is applied to a cumulative compound generator, the current through the shunt winding does what?

a)

Increases

b)

Decreases

c)

Stays the same

83.

The fourth color bans on a resistor represents the _________ of the resistance value.

a)

Voltage

b)

Torque

c)

Tolerance

d)

Current

84.

Fan, centrifugal pump, and business machines are all applications of what type of motor?

a)

Three Phase

b)

Single Phase

c)

Split Phase

d)

Induction

85.

Wye and Delta configuration are used in what type of motors?

a)

Double Phase Induction

b)

Step Phase Induction

c)

Single Phase Induction

d)

Three Phase Induction

86.

An overcurrent protection device for a motor control circuit operation with a motor FLA of 20 amps should be sized for at least 25 amps.

a)

False

b)

True

87.

When testing a circuit breaker in the closed position, the resistance between the terminals should measure less than how many ohms?

a)

1

b)

2

c)

3

d)

4

88.

An under compound generator tends to act like what kind of generator?

a)

Shunt

b)

Capacitor run capacitor start

c)

Capacitor start capacitor run

d)

Three phase

89.

If the winding halves on a wye halves of a delta three phase motor are connected in series, the motor is connected for what?

a)

No Voltage

b)

Low Voltage

c)

High Voltage

90.

Connecting the winding halves of a delta motor in parallel connects the motor for high voltage connections.

a)

True

b)

False

91.

What is the accepted industry standard for reversing a three phase motor? (If you get this wrong then you are dumb)

(a)  

92.

Reversing the start winding connecting and reversing the run winding connections will reverse the rotation of a split phase motor.

a)

True

b)

False

93.

The function of a(n) ________ is to show how components in an electrical system are connected and sometimes where they are located.

a)

Ladder Diagram

b)

PCB

c)

Electrical Print

94.

In a ladder diagram, power supplies are represented by the diagrams two ______.

a)

Vertical Lines

b)

Diagonal Lines

c)

Horizontal Lines

d)

Configurations

95.

Power supply, input devices, output devices, and conductors are all primary components of what?

a)

Terminal Blocks

b)

Printed Circuit Board

c)

Configuration

d)

Ladder Diagrams

96.

Connecting the winding halves of a delta motor in parallel connects the motor for low voltage operations.

a)

True

b)

False

97.

When sizing disconnect switches, the current or voltage rating should be less than the source's current and voltage

a)

True

b)

False

98.

_________ are required to prevent shock hazards that occur from touching metallic parts of an electrical circuit.

a)

Electrical Grounding Circuits

b)

Printed Circuit Boards

c)

Taxidermized Circuits

d)

Fuses

99.

When sizing disconnect switches, the current or voltage rating should equal or exceed the source's current or voltage.

a)

True

b)

False

100.

Every panel and many external components in an electrical control system must be grounded connecting ground wire to the ___________.

a)

Main Panel Enclosure

b)

DC Power Ground Source

c)

Control transformer Winding

d)

Main Power Ground Conductor

101.

The ____________ defines a set of requirements for conductors that are used in electrical panel grounding systems.

a)

Occupational Safety and Health Administration

b)

National Electrical Code

c)

National Ssociation of Manufactueres

d)

National electrical Contractors Association

102.

When using a DMM to verify a grounding system, the measurement mode is set to what?

a)

Voltage

b)

Current

c)

Resistance

d)

0

103.

Operation verification of a motor control system is done by verifying wiring connections and system operations.

a)

Circuit Breaker Operations

b)

Disconnect Voltage

c)

Wiring Connections

d)

Power Phase

104.

Which of the following provides the channels that route wires between the components inside an electrical panel?

a)

Fish Tape

b)

Wireways

c)

Terminal Blocks

d)

Significant Routes

105.

Before connecting a wire to an electrical panel component, it is important to first determine the what?

a)

Wire Length

b)

Wire Resistance

c)

Wire Color

d)

Wire Durability

106.

When connecting wire to a screw terminal using the straight wire method, it is important to make sure that the terminal clamp is in contact with the _____.

a)

Terminal Screw

b)

Ground Wire

c)

Bare Wire

d)

Wire Insulation

107.

If solid wire is nicked during the stripping process, a good practice is to what?

a)

Cut and strip the wire again

b)

Call your operator

c)

Give up

d)

Use a stronger wire

108.

Wires are fed through conduit by hand or by using what?

a)

Fish tape

b)

Tweezers

c)

Guantes

d)

Machines

109.

There are two common methods to identify wires that are run between panels. What is one of them?

(a)  

110.

Using _____is the best wire bundling method when there is more pace inside the panel.

a)

Wireways

b)

Wire Sleeves

c)

Wire Ties

d)

Wire Tape

111.

What is used together with wire ties to bundle wire along the back of a panel?

a)

Anchors

b)

Wiring tape

c)

Terminal Blocks

d)

Tape Fish

112.

When taping motor leads with wire having insulation rate 450 VAC, there should be how many layers of tape?

a)

3

b)

4

c)

5

d)

6