- Superintendent
- Mine manager
- Leader
- Agent
- Mine Management
Superintendent
- Providing Facilities for storage, assembly, testing and adjustment of breathing apparatus and other Rescue Equipment/Apparatus.
- Option A, B and C
- Providing speedy transport of equipment to mines.
- Options A and B only
- Serve as place for Rescue Training.
Options A and B only
- Wait for guidance of Senior officials, RIM and expert group.
- Assess the situation by interacting with men coming out of the Mine.
- Take immediate decisions and direct operations as the situation arises.
- Put Emergency Plan in operation.
- Restrict entry of persons into the Mine.
Wait for guidance of Senior officials, RIM and expert group.
- Electric Rope Shovel
- Dragline
- Hydraulic shovel
- Grab Bucket Excavator
The above picture shows the “Electric Rope Shovel”
- hydraulic accumulator
- hydraulic crane
- hydraulic gear
- hydraulic pump
Hydraulic accumulator holds/stores hydraulics fluid at high pressure.
- Hydraulic turbines
- Tidal power
- Solar energy
- Wind power
Solar energy is a thermal prime mover.
- More power
- Less power
- Same power
- None of the above
The belt transmits power by friction only whereas chain drives transfer speed and torque through the use of a linked chain and sprockets. Chain drives are well suited for this task because the sprocket teeth and chain setup results in a positive speed ratio and the ability to transfer a large amount of torque within a compact space.
- Belt velocity
- Initial belt tension
- Arc of contact
- All of these
The power transmitted by belt drive depends on the following factors
- The linear velocity of the belt
- Tension under which the belt is placed on the pulleys
- The contact area between the belt and the smaller pulley. The contact area is measured by measuring the arc of the contact between the belt and the pulley
- decreases
- increases
- remains the same
- none of these
When belt slips, the driven pulley does not rotate in the same rpm as the driving pulley.
Thus there is to reduction in the velocity ratio of the system. As the slipping of the belt is a common phenomenon, thus the belt tension should monitored and adjusted to maintain required velocity ratio.
- directly proportional to their diameters
- inversely proportional to their diameters
- directly proportional to the square of their diameters
- inversely proportional to the square of their diameters
It is the ratio between the velocities of the driver and the follower or driven. Let d1 = Diameter of the driver, d2 = Diameter of the follower, N1 = Speed of the driver in r.p.m N2 = Speed of the follower in r.p.m therefore, Length of the belt that passes over the driver, in one minute = π d1.N1 Similarly, length of the belt that passes over the follower, in one minute = π d2 . N2
Since the length of belt that passes over the driver in one minute is equal to the length of belt that passes over the follower in one minute, therefore π d1.N1 = π d2 . N2 Therefore, Velocity ratio, N2/N1 = d1/d2.
All Categories
- Central Electricity Authority Regulations (40)
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- GATE 2024 (10)
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- Mines Act 1952 (50)
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- THE MINES RESCUE RULES, 1985 (60)
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