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WorksheetsElectric Drives and Traction Quiz
Total questions: 15
Worksheet time: 8mins
Which of the following factors causes temperature rise in electric drives?
Frictional losses
Copper and iron losses
Ambient temperature
All of the above
Which load type is characterized by constant power demand over a long period?
Intermittent load
Continuous load
Variable load
Peak load
What is load equalization?
Reducing the weight of the load
Making the load variable
Smoothing out fluctuating loads over time
Increasing the motor rating
Which of the following is an intermittent load example?
Pump
Elevator
Fan
Furnace
Variable load drives are used in:
Textile machinery
Electric fans
Grinding machines
Welding transformers
What is electric traction?
Use of steam for traction
Use of internal combustion engines
Use of electric power for traction
Use of solar power
Which of the following is NOT a system of track electrification?
DC system
AC single-phase system
Three-phase AC system
Solar-powered track system
Which of the following voltages is used in DC electric traction systems in India?
750 V
1500 V
25 kV
230 V
The special feature of traction motors is:
High starting torque
Low inertia
Constant speed
High efficiency only at full load
Which of the following is a mechanism of train movement?
Constant pressure operation
Speed-time curve analysis
Load curve
Voltage drop
In trapezoidal speed-time curve, which of the following segments is typically constant?
Speed
Acceleration
Retardation
Distance
In quadrilateral speed-time curve, the number of segments is:
2
3
4
5
What is the typical supply voltage for AC traction systems in India?
3.3 kV
6.6 kV
11 kV
25 kV
One major advantage of electric traction over steam traction is:
More pollution
Higher fuel cost
Better acceleration and efficiency
Less initial investment
In a speed-time curve, the area under the curve represents:
Acceleration
Distance traveled
Power consumed
Torque
