What is the main purpose of using conveyors in mining?
C
Transporting materials continuously
Analysis & Theory
Conveyors are used for continuous transport of coal, ore, or overburden in mines.
Which of the following is a type of conveyor commonly used in mines?
Analysis & Theory
Belt conveyors are widely used in both surface and underground mines.
In underground mines, belt conveyors are most suitable for:
A
Short-distance haulage only
C
Long-distance horizontal haulage
Analysis & Theory
They are ideal for transporting materials over long horizontal or slightly inclined distances.
Which type of conveyor is best suited for transporting fine or powdered material?
Analysis & Theory
Screw conveyors are used for fine, powdered, or granular materials.
Aerial ropeways are mainly used for:
B
Short-distance movement
C
Long-distance transport over rough terrain
Analysis & Theory
Aerial ropeways are suited for long distances where roads or rail are not feasible.
Which is the most common tensioning method used in belt conveyors?
B
Counterweight tensioning
D
Spring-loaded tensioning
Analysis & Theory
Counterweight systems maintain constant belt tension in long conveyors.
In belt conveyors, snub pulleys are used to:
A
Change direction of belt
Analysis & Theory
Snub pulleys increase the angle of wrap and improve traction.
Which of the following is an advantage of using belt conveyors?
C
Low noise and continuous operation
D
Needs heavy manual labor
Analysis & Theory
Conveyors allow for continuous and efficient material handling with less noise.
What is the primary limitation of using belt conveyors in steep inclined roads?
Analysis & Theory
At steeper angles, materials may slide back unless special cleats or sidewalls are used.
Which conveyor type is suitable for steep inclines up to 90 degrees?
Analysis & Theory
Pocket belts with cleats allow transport of material on steep inclines.
What is the function of a take-up pulley in a belt conveyor system?
Analysis & Theory
Take-up pulleys keep the belt tight to prevent slippage and sagging.
A key disadvantage of aerial ropeways is:
B
Unsuitability for rough terrain
C
Vulnerability to wind and weather
Analysis & Theory
Aerial ropeways can be affected by adverse weather conditions like wind or storms.
Which part of a belt conveyor provides support to the return side of the belt?
Analysis & Theory
Idler rollers support both the carrying and return sides of the conveyor belt.
In aerial ropeways, which element holds the material containers?
Analysis & Theory
Bucket trolleys run along the rope and carry material containers (buckets or skips).
The maximum inclination recommended for conventional belt conveyors is approximately:
Analysis & Theory
For most materials, 18° is the practical limit without cleats or modifications.
The component responsible for pulling the conveyor belt is the:
Analysis & Theory
The drive pulley transmits power from the motor to move the belt.
Which type of conveyor is most suitable for surface mines with large output?
Analysis & Theory
Belt conveyors efficiently handle bulk material over long distances in surface mines.
In belt conveyors, material spillage is prevented by:
C
Installing skirt boards and sealing
Analysis & Theory
Skirt boards and sealing systems help control spillage at loading zones.
Which conveyor system is ideal when material needs to be transported vertically in confined spaces?
Analysis & Theory
Screw conveyors are compact and ideal for vertical lifting in small spaces.
Aerial ropeways in mining are particularly useful in:
C
Mountainous or uneven terrain
Analysis & Theory
Aerial ropeways can easily cross valleys, hills, and rivers, making them ideal in difficult terrain.