# Basic Of Electical System

8 Questions | Total Attempts: 275  Settings  Just it will test the basic of electrical.

• 1.
How many phases are used in India.at generation station.
• A.

3

• B.

4

• C.

2

• D.

1

• E.

Depend

• 2.
What is the relation between synchronous speed , frequency and no. of poles.
• A.

120*f*p

• B.

F*p/120

• C.

120*f/p

• D.

P/(120*f)

• E.

P*f

• 3.
Induction motor works on which type of supply.
• A.

Alternating Current

• B.

Direct Current

• C.

Either

• D.

Both

• E.

Battery

• 4.
Which one is not type of circuit breaker?
• A.

Air circuit breaker

• B.

Vacuum circuit breaker

• C.

Minimum oil circuit breaker

• D.

Maximum oil circuit breaker

• 5.
Max. transmission voltage in India is?
• A.

22kv

• B.

440kv

• C.

765kv

• D.

500kv

• E.

11kv

• 6.
What is rms?
• A.

Root Mean Square

• B.

Root mean system

• C.

Route mean square

• D.

Route mean square

• 7.
Fill up the formula for transformer: V1*N2=V2*?
• 8.
What are the color for three phase?
• A.

Red, yellow , blue

• B.

Red, yellow , black

• C.

Red , yellow , white

• D.

Red , yellow, orange Back to top