Where speed of over three hundred (300) meters per minute is permitted in hoisting engines operating in shaft, there shall be fitted and in use a _____________________ and ____________________ which shall be maintained in efficient working order.

• A. Tachograph and Speed Indicator
• B. Tachometer and Speed Gauge
• C. Tachograph and Speed Recorder
• D. Speed Indicator and Speed Recorder

Answer: (A)

Monitoring the hoisting speed in shaft operations relies on a combination of a data-recording device and a live readout. A tachograph is used to record the speed over time (with time stamps), providing a verifiable log of how fast the hoist operated and when. This is essential for safety compliance and for investigating incidents because it creates a traceable history of speed performance. A speed indicator, on the other hand, gives the operator an immediate, real-time display of the rope speed, so they can actively ensure the speed does not exceed the permitted limit of 300 meters per minute. Keeping both devices in efficient working order ensures readings are accurate and reliable, supporting both safe operation and regulatory accountability.

The other options don’t align with this combination. Tachometers or speed gauges measure rotational speed or provide a gauge readout without the recorded history, which is not the same as a formal speed record. A speed recorder provides recording but may not offer the required live indicator to the operator, and some pairings substitute one element for another that doesn’t meet the mandated surveillance and monitoring needs.