# Electrical Installation, Estimation and Costing - Electrical Engineering (MCQ) questions and answers

Dear Readers, Welcome to Electrical Installation, Estimation and Costing multiple choice questions and answers with explanation. These objective type Electrical Installation, Estimation and Costing questions are very important for campus placement test, semester exams, job interviews and competitive exams like GATE, IES, PSU, NET/SET/JRF, UPSC and diploma.

Specially developed for the Electrical Engineering freshers and professionals, these model questions are asked in the online technical test and interview of many companies.

These tutorial are also important for your viva in university exams like Anna university, Pune, VTU, UPTU, CUSAT etc.

1)   Which type of cable is used for underground service connections?
- Published on 05 Oct 15

a. Low tension 3 ¼ core cable
b. Low tension 3 ½ core cable
c. Low tension 2 ¼ core cable
d. Low tension 2 ½ core cable
 Answer  Explanation  Related Ques ANSWER: Low tension 3 ½ core cable Explanation: No explanation is available for this question!

2)   What is the formula to calculate the number of poles required in LT line distribution?
- Published on 05 Oct 15

a. Length / Span + 1
b. Length / Span + 10
c. Span / Length + 1
d. Span / Length + 10
 Answer  Explanation  Related Ques ANSWER: Length / Span + 1 Explanation: No explanation is available for this question!

3)   What should be the height of the ‘Roof Pole’?
- Published on 05 Oct 15

a. Less than 5m
b. Less than 3m
c. More than 3m
d. More than 10m
 Answer  Explanation  Related Ques ANSWER: Less than 3m Explanation: No explanation is available for this question!

4)   What is the multiplication factor used for the determination of maximum current carrying capacity of an 11 kV line?
- Published on 05 Oct 15

a. 0.88
b. 0.95
c. 0.9
d. 0.8
 Answer  Explanation  Related Ques ANSWER: 0.9 Explanation: No explanation is available for this question!

5)   What should be the minimum clearance for laying power cables near communication lines?
- Published on 05 Oct 15

a. 0.2 m horizontally and vertically
b. 0.6 m horizontally and vertically
c. 1 m horizontally and vertically
d. 1.5 m horizontally and vertically
 Answer  Explanation  Related Ques ANSWER: 0.6 m horizontally and vertically Explanation: No explanation is available for this question!

6)   Which test(s) is / are conducted after completion of erection of 11 kV line but before energisation of lines?
- Published on 05 Oct 15

a. Conductor continuity tests
b. Earth resistance tests
c. Insulation resistance tests
d. Both (a) & (c)
e. All of these
 Answer  Explanation  Related Ques ANSWER: All of these Explanation: No explanation is available for this question!

7)   What should be the minimum insulation resistance of a 11 kV line when tested with a 1000 v Megger?
- Published on 05 Oct 15

a. 10 kV
b. 50 kV
c. 33 kV
d. 120 kV
 Answer  Explanation  Related Ques ANSWER: 50 kV Explanation: No explanation is available for this question!

8)   What is the empirical formula employed for the determination of spacing of conductors in case of aluminium conductors?
- Published on 05 Oct 15

a. √S + V / 100
b. √S + 120 / V
c. √S + V / 150
d. √S + V / 1 kV
 Answer  Explanation  Related Ques ANSWER: √S + V / 150 Explanation: No explanation is available for this question!

9)   What is the angle between the pole and stay?
- Published on 05 Oct 15

a. 30 °
b. 45 °
c. 60 °
d. 10 °
 Answer  Explanation  Related Ques ANSWER: 30 ° Explanation: No explanation is available for this question!

10)   What should be the spacing between the two conductors if the working voltage is 11 kV?
- Published on 05 Oct 15

a. 76 mm
b. 101 mm
c. 190 mm
d. 250 mm
 Answer  Explanation  Related Ques ANSWER: 101 mm Explanation: No explanation is available for this question!

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