Related Questions

Which of the following is the disadvantage of electric traction over other systems of traction?
A Corrosion problems in the underground pipe work
B Short time power failure interrupts traffic for hours
C High capital outlay in fixed installations beside route limitation
D Interference with communication lines
_______ was the first city in India to adopt electric traction.
A Delhi
B Madras (Chennai)
C Calcutta (kolkata)
D Bombay (Mumbai)
In a simple circuit, one end of a conducting wire is attached to an electric cell, and the other end to an electric outlet
A battery
B faucet
C socket
D appliance
Which of the following motors is preferred for traction work?
A Universal motor
B D.C. series motor
C Synchronous motor
D Three-phase induction motor
Series motor is not suited for traction duty due to which of the following account?
A Less current drain on the heavy load torque
B Current surges after temporary switching off supply
C Self relieving property
D Commutating property at heavy load
Which one of the following surfaces will give highest coefficient of traction while using crawler track tractors?
A Ice
B Concrete
C Loose sand
D Earth
In which stages of labor "control cord traction" is needed?
A First stage
B Second stage
C Third stage
D Fourth stage
Skids occur when the brakes are applied so hard that the front or rear wheels lose traction are called as
A Cornering
B BLowout
C Power
D Braking
Why are the D.C. motors preferred for traction applications?
A Torque and speed are inversely proportional to armature current
B Torque is proportional to armature current
C Torque is proportional to square root of armature current
D The speed is inversely proportional to the torque and the torque is proportional to square of armature current
Main traction systems used in India are, those using
A Electric locomotives
B Diesel engine locomotives
C Steam engine locomotives
D All of the above

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