1.1.8 What is the difference between the two mine winches shown in figures 1.1.8 A and 1.1.8B?
two sheave
wheels
sheave wheel
winds
here
(1)
U
cage
and skip
unwinds
here
cage
and
skip
winch drum
10t
counter
weight
100
Figure 1.1.8 A
Figure 1.1.8 B

Manometers are good examples of measuring instruments, nowadays they are not as common as before. a)-capacitive probe gauges b)-gravitational gauges deformation ) gauges d)-digital gauges

Condition monitoring is a major component of. (clo4) a)- predictive maintenance. b)-preventive maintenance c)-proactive maintenance d)-reactive maintenance.

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?