Mining Machinery - Study Mode

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[#156] 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

(A) 345.50

(B) 348.60

(C) 350.10

(D) 365.50

Correct Answer

345.50

[#157] Which of the following centre core looks like an independent wire rope?

(A) SSC

(B) Fibre core

(C) IWRC

(D) Vegetable core

Correct Answer

(C) IWRC

[#158] The series of iron container of scraper chain conveyor over which the flight with chain moves is known as

(A) Driving wheel

(B) Donga or pan

(C) Sprocket

(D) Drum

Correct Answer

(B) Donga or pan

[#159] 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

(A) Co-efficient of utilization of space

(B) Co-efficient of resistance

(C) Co-efficient of adhesion

(D) Co-efficient of car stability

Correct Answer

(B) Co-efficient of resistance

[#160] If the wire rope used in wet conditions, it should be . . . . . . . .

(A) Stelorised

(B) Galvonized

(C) Steel coated

(D) Painted

Correct Answer

(B) Galvonized