Electrical Studys

1. By which of the following systems electric power may be transmitted ?

A. Overhead system
B. Underground system
C. Both (A) and (B)
D. None of the above

2. The underground system cannot be operated above ?

A. 440 V
B. 11 Kv
C. 33 Kv
D. 66 Kv

3. Overhead system can be designed for operation upto___ ?

A. 11 Kv
B. 33 Kv
C. 66 Kv
D. 400 Kv

4. If a variable part of annual cost on account of interest and depreciation on the capital outlay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the corresponding size of conductor will be most economical. This statement is known as...

A. Kelvin law
B. Ohms law
C. Kirchhoffs law
D. faradays law

5.The wooden poles well impregnated with composite oil or any preservative compound have life ?

A. From 2 to 5 years
B. 10 to 15 years
C. 25 to 30 years
D. 60 to 70 years