51. Right hand ordinary lay wire rope construction is most useful for
52. A 1 tonne mine car travelling at a constant speed of 10 km/h collides with a stationary buffer and comes to rest. If the buffer spring stiffness is 200 kN/m, the maximum compression in the spring in mm is
53. Sillicon percentage in wire ropes . . . . . . . .
54. All the layers of wires have same pitch or length of lay called . . . . . . . .
55. The rate at which a machine component oscillates is called
56. Method of joining two wire ropes permanently without using special fittings or attachments is known as
57. A direct rope haulage pulls 8 tubs loaded with coal through an incline of length 500 m having an inclination of 1 in 6. Consider the following additional data.
Capacity of tub = 1.0 tonne.
Tare weight of tub = 500 kg
Hauling speed = 9 km per hour
Coefficient of friction between wheel and rail = $$\frac{1}{{60}}$$
Coefficient of friction between rope and drum = $$\frac{1}{{10}}$$
Mass of rope per meter = 1.5 kg
The minimum power required to haul the tubs in kW is
Capacity of tub = 1.0 tonne.
Tare weight of tub = 500 kg
Hauling speed = 9 km per hour
Coefficient of friction between wheel and rail = $$\frac{1}{{60}}$$
Coefficient of friction between rope and drum = $$\frac{1}{{10}}$$
Mass of rope per meter = 1.5 kg
The minimum power required to haul the tubs in kW is
58. Which of the following centre core looks like an independent wire rope?
59. The series of iron container of scraper chain conveyor over which the flight with chain moves is known as
60. It is the ratio between the interruptions to the motion of a car along a straight level track with constant speed to the total weight of car
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