239. The time period of a simple pendulum when oscillating in water in comparison to when oscillating in air will be
A.More
B.Less
C.Same
D.Could be more or less depending upon its length
240. The time for complete oscillation, of a simple pendulum when its amplitude is increased will
A.Increase
B.Decrease
C.Remain same
D.May increase or decrease depending on length
241. If the primary direct crank of a reciprocating engine is located at 0? anticlockwise, then secondary direct crank will be located
A.0? clockwise
B.20? clockwise
C.20? anticlockwise
D.00 anticlockwise
242. In order to facilitate the starting of locomotive in any position, the cranks of a locomotive with two cylinders are placed at following angle to each other
A.45?
B.90?
C.135?
D.180?
243. Hammer blow occur when the c.g. of the balance weight is
A.Directly above the wheel centre
B.Directly below the wheel centre
C.Directly above or below the wheel centre
D.At angle 0
244. Partial balancing in locomotive results in
A.Hammer blow
B.Variation in tractive effort
C.Swaying couple
D.All of the above
245. Primary forces are usually balanced
A.Fully
B.Partially, half
C.Partially, two-thirds
D.Partially, one-third
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