ECET EEE 2010-7

1. The EHV is the voltage beyond

A) 66 KV
B) 132 KV
C) 400 KV
D) 220 KV

Answer : 66 KV
Explanation:-

2. In cables, sheath is used to

A) strength the cable conductors
B) provide insulation
C) prevent moisture from damaging the cable
D) provide charging current

Answer : prevent moisture from damaging the cable
Explanation:-

3. Unit of inductive reactance of a transmission line is

A) Henry
B) Faradays
C) Ohms
D) Volts

Answer : Ohms
Explanation:-

4. In the medium transmission line representation, which of the following parameters are included

A) Resistance and Inductance
B) Resistance, Inductance and Capacitance
C) Inductance and Capacitance
D) Resistance and capacitance

Answer : Resistance, Inductance and Capacitance
Explanation:-

5. Strain type insulators are used

A) At intermediate anchor towers
B) on straight runs
C) At dead ends
D) when the voltage is 33Kv

Answer : At dead ends
Explanation:-

6. The phenomena of the rise in recieving end voltage at the open circuited lightly loaded line is called the

A)Ferranti effect
B) Proximity effect
C) Skin effect
D) See back effect

Answer : Ferranti effect
Explanation:-

7. A uniformly loaded dc distributed AB is fed at both ends A and B with equal voltages, the maximum voltage drop occurs at

A) End A
B) End B
C) at the mid point of the distributor
D) at 1/4 of the distance from end A

Answer : at the mid point of the distributor
Explanation:-

8. The method that can bring the locomotive to stand still is

A) Rheostatic breaking
B) Plugging
C) Regenerative braking
D) Mechanical braking

Answer : Mechanical braking
Explanation:-

9. In the case of HVDC system, there is

A) Charging current but no skin effect
B) No charging current but skin effect
C) Neither charging current nor skin effect
D) Both charging current and skin effect

Answer : Charging current but no skin effect
Explanation:-

10. Corona loss is less when the shape of the conductor is

A) Oval
B) Flat
C) Circular
D) Independent of shape

Answer : Circular
Explanation:-