Question

Identify the safety device used in endless rope haulage system

• A. Back stay
• B. Small man clip
• C. Cam clip
• D. Monkey catch

Hint:

Associate the runaway protection device with the haulage type:
- Direct Haulage (trains going up): Back stay (drags behind).
- Endless Haulage (single tubs going up): Monkey catch (catches the axle if it runs back).

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
We need to identify which of the listed devices is a safety device specifically used with an endless rope haulage system.

Step 2: Detailed Explanation:
-

Back stay (or Back Sprag / Drag): This is a safety device used in

direct rope haulage.
It is a pointed bar attached to the rear of the last tub of an ascending train.
If the rope breaks or the train becomes detached, the back stay digs into the ground and prevents the train from running away back down the incline.
-

Small man clip, Cam clip: These are types of clips used to attach tubs to the haulage rope.
While their correct function is a matter of safety, they are operational components, not dedicated safety devices in the same sense as an anti-runaway device.
-

Monkey catch (or Tilting Rail): This is a safety device used in

endless rope haulage on inclined sections.
It consists of a short, hinged section of rail that is weighted to stay in a raised position.
Tubs moving in the intended upward direction can easily push the catch down and pass over it.
However, if the rope breaks and the tub starts to run backwards, the catch will be in its raised position, and the axle of the runaway tub will hit it, derailing the tub and stopping it safely.

Step 3: Final Answer:
A safety device used in an endless rope haulage system is the Monkey catch.
This corresponds to option (D).