wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Untitled Quiz

Total questions: 159

Worksheet time: 4hrs 50mins

Name
Class
Date
1.

Define the symbol

(a)  

2.

Define the symbol

4 lines
3.

Define the symbol

(a)  

4.

Define the symbol

(a)  

5.

Define the symbol

(a)  

6.

What is grounding and why is it important for switchgear?

4 lines
7.

What is a common maintenance practice for distribution devices?

4 lines
8.

What is the purpose of a protective relay in distribution systems?

4 lines
9.

What is the purpose of regular inspection of insulators on distribution devices?

4 lines
10.

What is the main function of a relay?

4 lines
11.

A Buchholz relay is commonly used for the protection of which of the following?

4 lines
12.

Which of the following arresters is also called as a protector tube?

4 lines
13.

A negative sequence relay is commonly used to protect

4 lines
14.

The normal resistance of a pilot wire is:

4 lines
15.

On which of the following effects of electric current a fuse operates?

4 lines
16.

Outdoor switchgear is generally used for voltage?

4 lines
17.

What is the main function of a disconnector?

4 lines
18.

Why are disconnectors connected with switches when installed on equipment with high voltage?

4 lines
19.

How many contact knives disconnectors designed for high voltages have?

4 lines
20.

How is the operation of a disconnector achieved?

4 lines
21.

What should be absent during the switching on and off disconnectors?

4 lines
22.

What tests are conducted to determine insulation resistance in disconnectors?

4 lines
23.

How is the DC resistance value determined in disconnectors?

4 lines
24.

What is the purpose of regular external examinations of disconnectors?

4 lines
25.

What are the main elements mounted on the rigid frame of disconnectors?

4 lines
26.

What is the purpose of the isolation gap in the disconnected position of a disconnector?

4 lines
27.

How are the contact knives of disconnectors designed to minimize the risk of breakdown?

4 lines
28.

What are the different types of contact knives used in disconnectors?

4 lines
29.

What are the operating conditions for disconnectors in terms of their installation location?

4 lines
30.

What are the methods of operation for disconnectors?

4 lines
31.

Why is the determination of insulation resistance important for disconnectors?

4 lines
32.

What is the purpose of checking the response time of disconnectors?

4 lines
33.

Why should disconnectors be selected based on the conditions of use and technical characteristics?

4 lines
34.

Why are disconnectors devoid of elements designed for spark extinguishing?

4 lines
35.

What is the main function of locks in disconnectors?

4 lines
36.

What is the maximum allowed value for insulation resistance in each individual element of a disconnector?

4 lines
37.

What is the purpose of the mechanism controlling the knives in disconnectors?

4 lines
38.

What should be absent during the switching on and off of disconnectors to ensure safe operation?

4 lines
39.

Number of turns on primary winding is 2400 while on secondary 1200. If voltage on secondary winding 20V, what is the voltage on primary winding?

4 lines
40.

The current transformer has

4 lines
41.

Which of the following factors should be taken into account when choosing the installation location of the switchgear?

a)

Close to cooling systems.

b)

The available access to numerous rays.

c)

Close to loads

d)

The level in the environment.

e)

Proximity to high-voltage electrical networks.

42.

What is the surge arrester?

4 lines
43.

Which of the following precautions should be taken before installing or connecting the switchgear?

a)

Turn off the power before starting work.

b)

Turn on the power before starting work.

c)

Use insulating gloves and goggles.

d)

Make sure that the voltage and frequency of the network correspond correctly to the device.

e)

All of the above.

44.

Which of the following statements is true about the designations and markings of ports on the switchgear?

4 lines
45.

What function does the grounding wire perform when connecting the switchgear?

4 lines
46.

Which of the following connection methods is the safest when installing a switchgear?

4 lines
47.

Which of the following statements is true regarding the choice of wires for connecting the switchgear?

4 lines
48.

Name all types of surge arrester?

4 lines
49.

Determine the voltage level of intermediate arrester?

(a)  

50.

Determine the voltage level of station class arrester?

(a)  

51.

What is the maximum rated voltage for a single pressure puffer type SF6 circuit breaker?

(a)  

52.

What is the recommended frequency for testing the mechanical operation of a single pressure puffer type SF6 circuit breaker?

(a)  

53.

What is the purpose of the auxiliary contacts in a single pressure puffer type SF6 circuit breaker?

4 lines
54.

What is the purpose of a disconnector?

4 lines
55.

Which of the following is NOT a type of disconnector?

4 lines
56.

What is the main difference between a disconnector and a circuit breaker?

4 lines
57.

When should a disconnector be used?

4 lines
58.

Which of the following is an example of a disconnector?

4 lines
59.

What is the primary function of a vacuum circuit breaker?

4 lines
60.

Which type of SF6 circuit breaker is most commonly used in high voltage applications?

4 lines
61.

What parameters should be considered when selecting pipes for installation of distribution circuits?

4 lines
62.

What parameters should be considered when selecting tools for installing distribution circuits?

4 lines
63.

What type of connection is commonly used for wires in distribution circuits?

4 lines
64.

What parameters should be considered when selecting the type of connection for wires in distribution circuits?

4 lines
65.

What is the purpose of regular inspection of fuse cutouts on distribution lines?

4 lines
66.

What is the purpose of regular testing of voltage regulators on distribution lines?

4 lines
67.

What is the purpose of regular inspection of capacitor banks on distribution lines?

4 lines
68.

What is the purpose of regular inspection of lightning arrestors on distribution lines?

4 lines
69.

What is the purpose of regular inspection of reclosers on distribution lines?

4 lines
70.

Which of the following is a common maintenance practice for distribution switchgear?

4 lines
71.

What symbol is this?

a)

Fuse

b)

Bus duct

c)

Fixed value Resistor

d)

Ground

e)

Battery

72.

What is the purpose of a Single Line Diagram?

a)

To provide a visual representation of system

b)

To calculate electrical loads

c)

To design mechanical systems

d)

To provide 3D visualization

e)

To protect electrical system

73.

Define the symbol

a)

Light

b)

Distribution box

c)

Transformer

d)

Fuse

e)

Terminal

74.

What does SPST mean?

a)

Single pole single throw

b)

Single phase single throw

c)

Single pole single tap

d)

System protection switch tap

e)

Single phase single tap

75.

Define the symbol

a)

Tapped Air Cored Inductor

b)

Fixed Ferrite Cored Inductor

c)

Tapped Ferrite Cored Inductor

d)

Fixed Air Cored Inductor

e)

Variable Air Core Inductor

76.

Define the symbol

a)

Bell

b)

Loudspeaker

c)

Junction Box

d)

Buzzer

e)

Pilot Lamp Indicator

77.

What symbol is this?

a)

Indicating light

b)

Capacitor

c)

Protection Relay

d)

Low voltage motor control

e)

Meduim voltage motor starter

78.

What does the switch symbol typically represent in electrical diagrams?

a)

Voltage source

b)

Grounding point

c)

Power supply

d)

Circuit protection device

e)

Control for electrical circuit

79.

What symbol is this?

a)

Indicating light

b)

Capacitor

c)

Low voltage motor control

d)

Switch

e)

Meduim voltage motor starter

80.

Define the symbol

a)

Fixed Value Resistor(IEC Symbol)

b)

Fixed Value Resistor(IEEE Symbol)

c)

Variable Resistor(Potentiometer)

d)

Fuse

e)

Variable Resistor(Rheostat)

81.

What is a bus duct?

a)

Type of electrical transformer

b)

Cable used for data transmission

c)

Type of protection device

d)

System for distributing electrical power within a building or industrial facility

e)

Device used for voltage regulation in power systems

82.

What symbol is this?

a)

Current transformer

b)

Voltage transformer

c)

Ground(earth)

d)

Instrument transformer

e)

Battery

83.

What does DPST mean?

a)

Double pin single throw

b)

Double phase single tap

c)

Double pole single throw

d)

Double pin single tap

e)

Double phase single throw

84.

What symbol is this?

a)

Indicating light

b)

Protection Relay

c)

Capacitor

d)

Low voltage motor control

e)

Meduim voltage motor starter

85.

What symbol is this?

a)

Current transformer

b)

Voltage transformer

c)

Ground(earth)

d)

AC supply

e)

Battery

86.

What symbol is this?

a)

Indicating light

b)

Capacitor

c)

Low voltage motor control

d)

Meduim voltage motor starter

e)

Inductor

87.

What is the operational voltage range of single phase laboratory autotransformer?

a)

0-48 V

b)

0-250V

c)

0-400V

d)

0-1000V

e)

0-2000V

88.

Where is surge arrester placed?

a)

Near transformer

b)

At the end of substation

c)

Under Circuit Breaker

d)

Near electric meter

e)

On overhead lines

89.

What is the main advantage of laboratory autotransformer?

a)

it has moisture protection

b)

it gives smooth voltage control

c)

it allow control frequency

d)

it allow to use in small devices

e)

none above

90.

In oil tank switches, oil is used for…

a)

extinguishing the electric arc

b)

heating the elements

c)

insulation of live parts

d)

arc quenching and isolation of current-carrying parts

e)

for lubrication of transformer parts

91.

What is the maximum operational current for terminal block?

a)

100A

b)

200A

c)

300A

d)

400A

e)

500A

92.

What is rated voltage of Distribution arrester?

a)

From 1kV to 36kV

b)

From 6kV to 32 kV

c)

From 112 kV

d)

Up to 1kV

e)

Above 220 kV

93.

Thermal conductivity is

a)

the process of transferring thermal energy from a heated body to bodies located in the surrounding space by electromagnetic vibrations with different wavelengths

b)

the process of lifting a heated layer of gas or liquid up

c)

the property of the material to storage the heat

d)

the property of the material to transfer heat from more heated places to less heated ones

e)

there is no correct answer

94.

What symbol is this?

a)

Motor

b)

Normally open contact

c)

Normally closed contact

d)

Low voltage motor control

e)

Overlead relay

95.

What error percentage should not exceed the measured value of transformer manufacturer?

a)

5%

b)

3%

c)

2%

d)

1%

e)

0.5%

96.

Protective devices include

a)

contactors, starters, power and command controllers, rheostats

b)

relays and sensors

c)

fuses

d)

switches and starters

e)

contactors and fuses

97.

What is temperature must not exceed top layer of oil?

a)

50 C°

b)

60 C°

c)

75 C°

d)

80 C°

e)

95 C°

98.

What is the danger of eddy currents?

a)

Destruction of insulation due to overheating

b)

The occurrence of humidity

c)

Undercooling

d)

Destruction of device due to overcooling

e)

There is no danger

99.

An apparatus whose spark gap breaks through at a certain voltage value is called

a)

vacuum circuit breaker

b)

short-circuit breaker

c)

disconnector

d)

air circuit breaker

e)

spark gap

100.

What is the designed power in power transformers that are used oil cooling system?

a)

10kW

b)

50kW

c)

16kW

d)

10MW

e)

16MW

101.

The monitoring devices include

a)

contactors, starters, power and command controllers, rheostats

b)

relays and sensors

c)

fuses

d)

switches and starters

e)

contactors and fuses

102.

What is the material of the core in transformer?

a)

platinum

b)

iron

c)

copper

d)

copper bismuth

e)

silver

103.

Which of the listed devices is usually responsible for the automatic switching on and off of the electrical load?

a)

Time relay

b)

Circuit breaker

c)

Switchboard

d)

Relay

e)

None of the above

104.

What is staying the same in step up and step down transformers?

a)

voltage

b)

current

c)

temperature

d)

power

105.

What is symbol is this?

a)

Future removable

b)

Non-drawout circuit breaker

c)

Drawout circuit breaker

d)

Spare part

e)

Disconnect switch

106.

What is decreased in step up transformers?

a)

voltage

b)

current

c)

frequency

d)

temperature

e)

power

107.

To extinguish the arc, it is necessary

a)

a sharp increase in current

b)

a sharp decrease in current

c)

the current value should not change

d)

the current value does

108.

What is a transformer?

a)

Stationary machine that convert alternating voltage of value into another while maintaining the current frequency

b)

Protective device that burn out if the voltage exceeds fixed operational value

c)

Protective device that create circuit break once the leakages occur

d)

Device that produce energy

109.

What is the principle of operation of a transformer?

a)

Electromagnetic induction

b)

Coulomb's law

c)

First law of thermodynamics

d)

Kirchoff's law

e)

Ohm's law

110.

How to decrease eddy current loss?

a)

Make a core of plates isolated from each other

b)

Provide natural cooling

c)

Decrease the volume of the core

d)

Increase the current level

e)

Decrease the current level

111.

On which of the following effects of electric current a fuse operates?

a)

Heating

b)

Electrostatic

c)

Photoelectric

d)

Short circuit

e)

Overload

112.

Disconnector operations are performed....

a)

when the circuits are de-energized

b)

at low voltages

c)

anytime

d)

only at high voltage

e)

there is no correct answer

113.

What is the difference between power and distribution transformer?

a)

Power transformer is much heavier

b)

Distribution transformer is used to step-down voltage, while power transformer is used to step-up

c)

Power transformer is used in distribution substations while distribution substation for transferring electricity through transmission lines

d)

There is no difference

e)

None of the above

114.

What is symbol is this?

a)

Two winding transformer

b)

Current Transformer

c)

Synchronoscope

d)

Three phase delta winding

e)

Three phase star winding

115.

What is the full load efficiency of majority of transformers?

a)

50-60%

b)

70-80%

c)

93-95.5%

d)

85-93.5%

e)

95-98.5%

116.

Why transformation coefficient is important?

a)

it allows to check the correct number of turns of the winding

b)

it allows to change the frequency

c)

it allows to check the correct number of cores

d)

it allows to change the resistance

e)

none above

117.

Arcing voltage will be the least in case of

a)

Copper

b)

Silver

c)

Tungsten

d)

Carbon

e)

Titan

118.

What is the main advantage of instrument transformers?

a)

moisture protection

b)

step up

c)

overload protection

d)

ability of measuring

e)

step down

119.

What is the shift of the primary and secondary windings in a star-delta or delta - star connection?

a)

30°

b)

60°

c)

90°

d)

120°

e)

150°

120.

What is the main feature of autotransformers?

a)

it can convert AC voltage into DC voltage

b)

it is used for much higher voltage amplitudes compared to simple transformer

c)

it has 4 windings

d)

it can supply by current

e)

it has 1 winding

121.

The winding of a transformer that is connected to an initial AC voltage source is called?

a)

primary

b)

load

c)

core

d)

consumer

e)

secondary

122.

What is the main disadvantage of autotransformer?

a)

it works only with DC voltage

b)

it will heat up after 1 use

c)

It heats up very quickly

d)

any undesirable condition at primary will affect the equipment on secondary winding because they aren't isolated

e)

it doesn't have neutral conductor

123.

What is symbol is this?

a)

Tachometer

b)

Varmeter

c)

Synchroscope

d)

Frequency meter

e)

Light bulb

124.

What is the most common operational frequency of the transformers?

a)

5 or 10 Hz

b)

20 or 30 Hz

c)

30 or 45 Hz

d)

40 or 45 Hz

e)

50 or 60 Hz

125.

What symbol is this?

a)

Motor

b)

Normally open contact

c)

Normally closed contact

d)

Overlead relay

e)

Switching contact

126.

The winding that is connected to the load is called?

a)

primary

b)

secondary

c)

first

d)

third

e)

core

127.

What is symbol is this?

a)

Future removable

b)

Non-drawout circuit breaker

c)

Sign

d)

Drawout circuit breaker

e)

Disconnect switch

128.

What is symbol is this?

a)

Removable

b)

Transformer

c)

Drawout circuit breaker

d)

Inductor

e)

Disconnect switch

129.

What is the function of secondary arresters in a power system?

a)

Protecting transformers

b)

Protecting substation equipment

c)

Protecting transmission lines

d)

Protecting grounding

e)

None of the above

130.

When is distribution devices considered open?

a)

It is located outdoors

b)

Located indoors

c)

The components are not covered by anything

d)

Located inside another device

e)

In nameplate

131.

What is the material of the winding in transformer?

a)

copper

b)

silver

c)

copper bismuth

d)

platinum

e)

tungsten

132.

What connection configuration has the possibility of using neutral wire?

a)

delta

b)

open star

c)

delta-star

d)

star

e)

square

133.

Which material is used for bus bars?

a)

Copper rods

b)

Aluminium rods

c)

Titan rods

d)

Silver rods

e)

Any conducting material

134.

The thermal circuit breaker has _____.

a)

Instantaneous trip action

b)

Delayed trip action

c)

Instantaneous short action

d)

Delayed on/off action

e)

Any of the above

135.

What is symbol is this?

a)

Future removable

b)

Non-drawout circuit breaker

c)

Drawout circuit breaker

d)

Disconnect switch

e)

Spare part

136.

What is distribution devices?

a)

An electrical installation that serves for receiving and distributing electrical energy of the same voltage class

b)

A device that completely turns off the circuit if an error occurs

c)

An electrical installation that serves for receiving and distributing electrical energy of the different voltage class

d)

A disposable device that expels after overexerting the circuit

e)

A device that allows the circuit to be closed

137.

Which type of device is designed to protect electrical equipment from overcurrent by melting and breaking the circuit?

a)

Circuit breaker

b)

Fuse

c)

Isolator

d)

Contactor

e)

Disconnector

138.

What types of distribution devices are divided into?

a)

closed-open

b)

open-shared

c)

closed-divided

d)

closed-shared

e)

open-divided

139.

What is the main component of switchgear?

a)

Circuit breaker

b)

Isolator

c)

Busbar

d)

Instrument transformer

e)

All of the above

140.

To extinguish the arc, it is necessary

a)

a sharp increase in current

b)

a sharp decrease in current

c)

the current value should not change

d)

the current value does not matter

e)

the current value should drop to zero

141.

What symbol is this?

a)

Motor

b)

Normally open contact

c)

Normally closed contact

d)

Overlead relay

e)

Switching contact

142.

Which type of breaker uses a large amount of oil to break the arc?

a)

Air circuit breaker

b)

Bulk Oil Circuit Breakers

c)

Minimum oil circuit breaker

d)

External oil circuit breaker

143.

Which type of arrester is used to provide secondary protection in a power system?

a)

Station class arrester

b)

Medium class arrester

c)

Intermediate class arrester

d)

Distribution class arrester

e)

None of the above

144.

Which type of device is used to protect electrical equipment from damage due to overvoltage conditions?

a)

Surge arrester

b)

Fault current limiter

c)

Arc-resistant switchgear

d)

Disconnector

e)

Load shedding switchgear

145.

Which type of SF6 circuit breaker is most commonly used in high voltage applications?

a)

Single pressure type

b)

Double pressure type

c)

Puffer type

d)

Self-blast type

e)

Plunger type

146.

What is it SF6?

a)

Dielectric water

b)

Water circuit breaker

c)

Dielectric gas

d)

gas

e)

Dielectric liquid

147.

Which distribution devices is considered closed?

a)

It is located indoors

b)

It is located outdoors

c)

In nameplate

d)

It is located inside of other device

e)

The components are not covered by anything

148.

Which of the following additional components may be required when installing the switchgear?

a)

Cable ducts or routes.

b)

Protective circuit breakers.

c)

Grounding pads or wires.

d)

All of the above

e)

None of the above

149.

Through which the displacement of the moving contacts can be synchronized?

a)

through the valve

b)

through the arc

c)

through the gas

d)

through the cable

e)

through the motor

150.

Which type of device is used to protect electrical equipment from damage due to excessive heat?

a)

Thermal overload relay

b)

Fuse

c)

Circuit breaker

d)

Time relay

e)

Isolator

151.

What happens as soon as a fault occurs in the SF6 circuit breaker?

a)

nothing

b)

CB will blow up

c)

SF6 circuit breaker will stop working

d)

circuit breaker contacts will be pulled out separately

e)

the contacts of the circuit breaker will melt and a fire will occur

152.

Why does SF6 gas attract free electrons in the arc band?

a)

for gas cooling

b)

to form ions

c)

for gas removal

d)

to form molecules

e)

to charge the generator

153.

The start-up devices include

a)

contactors, starters, power and command controllers, rheostats

b)

relays and sensors

c)

fuses

d)

rheostats, contactors and controllers

e)

switches, switches

154.

Outdoor switchgear is generally used for voltage?

a)

11 kV

b)

33 kV

c)

66 kV

d)

132 kV

e)

220 kV

155.

Two main parts of SF6 circuit breaker?

a)

radiator and arc

b)

switch button and gas

c)

indicator and frame

d)

the interrupter unit and gas system.

e)

cooling unit and filtration

156.

High-voltage switches are devices designed for

a)

for switching on and off sections of electric circuits under voltage in the absence of a load current

b)

for operational short circuits and opening of low voltage circuits

c)

for operational short circuits and opening of high voltage circuits in nominal operating modes and automatic opening in emergency modes.

d)

the spark gap of which breaks through at a certain value of the applied voltage, thereby limiting overvoltage's in the installation.

e)

for current measurement and power supply of protection circuits

157.

Where is the oil tank located to isolate it from the ground?

a)

on porcelain insulator

b)

on non-porcelain insulator

c)

in open area

d)

on figuration insulator

e)

on cooler insulator

158.

Automatic double pressure switch SF6 which includes pressurized SF6 gas in the arcing cylinder?

a)

Double Pressure Puffer Type

b)

Triple Puffer Type

c)

Double Pressure Single Type

d)

Single Pressure Puffer Type

e)

there is no correct answer

159.

Which of the following is a part of construction of the SF6 circuit breaker?

a)

Fuse

b)

Bushings

c)

Corrector

d)

Gas filling connector

e)

Locks

Similar Resources on Wayground

Kuis kuisan

162 questions

Kuis kuisan

quiz

Worksheet

•

12th Grade

Pengetahuan Pramuka 3

163 questions

Pengetahuan Pramuka 3

quiz

Worksheet

•

9th - 12th Grade

Anatomy & Physiology Midterm Review

159 questions

Anatomy & Physiology Midterm Review

quiz

Worksheet

•

12th Grade