Junior Safety Manager Interview Questions and Answers

Safe man hours formula is calculated by multiplying the number of hours worked by the number of workers and the safety factor.

• Safe man hours = Number of hours worked x Number of workers x Safety factor

• Safety factor is usually between 0.85 to 0.95 depending on the level of safety measures implemented

• Example: If 10 workers worked for 8 hours with a safety factor of 0.9, the safe man hours would be 72 (8 x 10 x 0.9)

ELCB trip timing is the time taken by the device to trip in case of an earth leakage fault.

• ELCB stands for Earth Leakage Circuit Breaker.

• The trip timing of ELCB is usually between 0.1 to 0.2 seconds.

• The trip timing can be adjusted based on the sensitivity required for the circuit.

• ELCBs are used to protect against electric shock and fire hazards caused by earth leakage faults.