⚡Electrical Engineering MCQs
Electrical Engineering MCQs
499 MCQs41
Which of the following braking systems is used on steam locomotives ?
AHydraulic system
BPneumatic system
CVacuum system
DNone of the above
42
The rate of acceleration on suburban orurban services is restricted by the consideration of______________?
AEngine power
BTrack curves
CPassenger Discomfort
DTrack size
43
The friction at the track is proportional to________________?
A1/speed
Bl/(speed)2
Cspeed
Dnone of the above
44
_______________watt-hours per tonne km is usually the specific energy consumption for suburban services?
A15—20
B50—75
C120—150
D160—200
45
The rate of acceleration on suburban orurban service is in the range_________________?
A0.2 to 0.5 km phps
B1.6 to 4.0 km phps
C5 to 10 km phps
D15 to 25 km phps
46
Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction ?
AReduced current method
BTap changing control of transformer
CSeries parallel operation of motors
DAll of the above
47
The braking retardation is usually in the range__________________?
A0.15 to 0.30 km phps
B0.30 to 0.6 km phps
C0.6 to 2.4 km phps
D3 to 5 km phps E. 10 to 15 km phps
48
have maximum unbalanced forces_______________?
ADiesel shunters
BSteam locomotives
CElectric locomotives
DDiesel locomotives
49
In case of _________________ free running and coasting periods are generally long ?
Amain-line service
Burban service
Csub-urban service
Dall of the above
50
The return circuit for tramcars is through_______________?
Aneutral wire
Brails
Ccables
Dcommon earthing