A. overcome the gravity component of train mass
B. overcome friction, windage and curve resistance
C. accelerate the train mass
D. do all of the above
Related Mcqs:
- In case of locomotives the tractive power is provided by______________?
A. single cylinder double acting steam engine
B. double cylinder, single acting steam engine
C. double cylinder, double acting steam engine
D. single stage steam turbine - For given maximum axle load tractive efforts of AC. locomotive will be_____________?
A. less than that of D.C. locomotive
B. more than that of D.C. locomotive
C. equal to that of D.C. locomotive
D. none of the above - The wheels of a train, engine as well as bogies, are slightly tapered to_____________?
A. reduce friction
B. increase friction
C. facilitate braking
D. facilitate in taking turns - The number of passenger coaches that can be attached to a diesel engine locomotive on broad gauge is usually restricted to_____________/
A. 5
B. 10
C. 14
D. 17 - The air resistance to the movement of the train is proportional to_____________?
A. speed
B. (speed)
C. (speed)
D. 1/speed - The purpose of RC or transformer coupling is to_____________?
A. Block a.c.
B. Separate bias of one stage from another
C. Increase thermal stability
None of the above - The emf induced in a conductor of unit length moving with unit velocity at right angles to a magnetic field is equal to_____________?
A. Magnetic flux density
B. Torque
C. Mutual induction
D. Motional emf - Energy consumption in propelling the train is required for which of the following?
A. Work against the resistance to motion
B. Work against gravity while moving up the gradient
C. Acceleration
D. All of the above - The battery connections required to forward bias a pn junction are_________________?
A. +ve terminal to p and –ve terminal to n
B. -ve terminal to p and +ve terminal to n
C. -ve terminal to p and –ve terminal to n
D. None of the above - What turn ratio (Np/Ns) of transformer is required to match 4 O speaker to a transistor having an output impedance of 8000 O ?
A. 2
B. 7
C. 3
D. None of the above
