Galvanized steel structures towers and insulators for transmission distribution lines - Electrical Engineering (MCQ) questions and answers

1)   Arrange these in the correct order of the sequence for designing the tower?

i. Design data
ii. Prototype manufacture
iii. Providing tests
iv. Preliminary design
v. Final design
vi. Earlier experience


a. vi – i – iv – v – ii – iii
b. vi – i – iv – ii – iii – v
c. i – vi – iv – v – ii – iii
d. i – iv – iv – ii – iii – v
Answer  Explanation 

ANSWER: vi – i – iv – ii – iii – v

Explanation:
No explanation is available for this question!
2)   Which types of joints are commonly used to form a string in a string insulator?

a. Ball and socket joint
b. Clevis and tongue coupling
c. Only connector joints
d. Both (a) and (b)
e. All the above
Answer  Explanation 

ANSWER: Both (a) and (b)

Explanation:
No explanation is available for this question!
3)   What is the application of hollow porcelain insulator?

a. Transformer bushing
b. Wall bushing
c. SF6 GIS bushing
d. Only b and c
e. All of these
Answer  Explanation 

ANSWER: Only b and c

Explanation:
No explanation is available for this question!
4)   Which type of structure is preferred in modern stations?

a. Aluminium alloy structure
b. Galvanised steel structure
c. Fabricated structure
d. All of these
Answer  Explanation 

ANSWER: Galvanised steel structure

Explanation:
No explanation is available for this question!
5)   What is the minimum life span of a galvanised steel structure?

a. 15 years
b. 25 years
c. 40 years
d. 80 years
Answer  Explanation 

ANSWER: 40 years

Explanation:
No explanation is available for this question!
6)   Which type of foundation is preferred for lattice towers?

a. Rock foundation
b. Pole foundation
c. Anchor foundation
d. All of these
e. None of these
Answer  Explanation 

ANSWER: All of these

Explanation:
No explanation is available for this question!
7)   Corona rings are fixed on which among these?

a. At cross arm end of the string assembly
b. At corners of bus bar joints
c. Only at contacts of isolators
d. Only b and c
e. All of these
Answer  Explanation 

ANSWER: All of these

Explanation:
No explanation is available for this question!
8)   Which part of the tower is buried in the ground?

a. Anchor
b. Guy wire
c. Braces
d. Strut inclined support
Answer  Explanation 

ANSWER: Anchor

Explanation:
No explanation is available for this question!
9)   What should be the permissible sag in meters between two towers if the voltage to be carried is 66 kV?

a. 2 – 4 m
b. 5 – 7 m
c. 4 – 5 m
d. 1.5 m
Answer  Explanation 

ANSWER: 2 – 4 m

Explanation:
No explanation is available for this question!
10)   What will be the span of a transmission line carrying a voltage of 11 kV?

a. 200 m
b. 100 m
c. 260 m
d. 80 m
Answer  Explanation 

ANSWER: 100 m

Explanation:
No explanation is available for this question!

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