1. Coal cutting machine ropes are . . . . . . . . wire rope core.
2. Steel wire rope of 25mm diameter weighing 37N/m has 6 strands of 7 wires each. The diameter and tensile strength of each wire are 2.5mm and 1800 MPa, respectively. The factor of safety for raising a cage of weight 60 kN from a depth of 200m is
3. The joining of ropes is termed as . . . . . . . .
4. How many types of lay of ropes?
5. The following characteristic curves (P, Q, R, S) pertain to rotary drilling in rock.
Title of the curve
I : Torque versus RPM
II: Rate of penetration versus uniaxial compressive strength of rock
III : Rate of penetration versus weight on bit
IV : Specific energy versus weight on bit
Match the curves with their titles
Title of the curve
I : Torque versus RPM
II: Rate of penetration versus uniaxial compressive strength of rock
III : Rate of penetration versus weight on bit
IV : Specific energy versus weight on bit
Match the curves with their titles
6. The ropes which under go frequent movement of coiling they are called . . . . . . . .
7. The ratio between breaking load and total suspended load on rope called . . . . . . . .
8. The haulage wire ropes are generally . . . . . . . .
9. Rotation of impeller inside the pump forces water to enter in the suction pipe. This is effected due to
10. Cowl is the component of
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