Electrical Engineering Objective Questions and Answers Pdf - 1
Question: 1
The horsepower of steam locomotives is
(A) 3000 to 4000
(B) 2000 to 3000
(C) 1500 to 2000
(D) upto 1500
Ans: D
upto 1500
Question: 2
In which of the following applications, direct current is absolutely essential?
(A) traction
(B) variable speed operation
(C) electrolysis
(D) illumination
Ans: C
electrolysis
Question: 3
The internal efficiency of a mercury arc rectifier depends on
(A) r.m.s. value of current
(B) voltage and current
(C) current only
(D) voltage only
Ans: D
voltage only
Question: 4
When a lead acid battery is in fully charged condition, the colour of its positive plate is
(A) dark brown
(B) brown
(C) dark grey
(D) none of the above
Ans: A
dark brown
Question: 5
The watt-hour efficiency of a lead acid cell varies between
(A) 25 to 35%
(B) 40 to 60%
(C) 70 to 80%
(D) 90 to 95%
Ans: C
70 to 80%
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