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# MCQ's Electrical Substation

If you think you have a good understanding of,  challenge yourself and take our quiz.

Question 1 of 16

# The following statement is true about the electrical substation?

A

Converts AC voltage from one level to another

B

Change nature of voltage ( AC to DC or DC to AC)

C

Both (a) and (b)

D

None of the above

Question 2 of 16

# Switches are required in substation for the following purpose?

A

For avoiding shutdown of complete substation

B

Isolate equipment

C

Transfer load

D

Control electricity

E

All of the above

Question 3 of 16

A

0.24kV - 0.6 kV

B

2.4kV – 69 kV

C

115kV - 765 kV

D

800kV - 1,100 kV

Question 4 of 16

# Power coming from different sources are collected at one place and synchronized with grid, is the property of?

A

Switching substation

B

Collecting substation

C

Transformer substation

D

Converting substation

Question 5 of 16

# Substations used to step up or step down the voltage level of an AC power system for power distribution are commonly termed as?

A

Switching substation

B

Collecting substation

C

Transformer substation

D

Converting substation

Question 6 of 16

# Substations used in DC transmission is?

A

Switching substation

B

Collecting substation

C

Transformer substation

D

Converting substation

Question 7 of 16

# Substations that uses capacitor bank and synchronous condenser to compensate transmission line losses and power factor correction are called?

A

Switching substation

B

Collecting substation

C

Power factor correction substations

D

Converting substation

Question 8 of 16

# In a substation, relay is connected?

A

Directly to the system

B

At the primary side of current transformer

C

At the secondary side of current transformer

D

None of the above

Question 9 of 16

# The size of liquid filled transformer is in the range of?

A

50 to 250 kVA

B

250 to 750 kVA

C

750 to 3750 kVA

D

750 to 2500 kVA

Question 10 of 16

# While sizing transformer (in kVA), the selection should be made on the consideration?

A

Capable of holding sudden overload

B

Future expansion

C

Both (a) & (b)

D

None of the above

Question 11 of 16

# Air blast circuit breaker are now replaced with?

A

Vacuum circuit breaker

B

Oil circuit breaker

C

SF6 gas circuit breaker

D

None of the above

Question 12 of 16

# Which circuit breaker is preferable for 22 kV system?

A

Vacuum circuit breaker

B

Oil circuit breaker

C

SF6 gas circuit breaker

D

None of the above

Question 13 of 16

# Standard current rating of secondary side of CT is?

A

1 Ampere

B

5 Ampere

C

Both (a) and (b)

D

None of the above

Question 14 of 16

# Arcing horns are used to?

A

Isolate fault

B

Interrupt charging or magnetizing current

C

Detect fault

D

None of the above

Question 15 of 16

# A relay is a protection device used in substation to?

A

Sense fault

B

Isolate the faulty section from the system

C

Issues a trip signal to breaker in case of fault

D

Both (a) & (c)

Question 16 of 16

A

Relays

B

Circuit breaker

C

Disconnector

D

Surge arrester