HV Exit Exam • Set 3 Question 25 of 30

When procedures involve the temporary removal of circuit main earths under a Sanction-to-Test, the earths are secured with working locks. The keys to these locks are:

✓

Direct Answer

Option A: Retained by the Authorised Person (HV) who removes and replaces the earth as requested

Under marine HV safety rules, the Authorised Person (HV) who issued the Sanction-to-Test retains custody of safety lock keys and personally oversees the removal and re-application of earths.

All Options

Retained by the Authorised Person (HV) who removes and replaces the earth as requested (Correct Answer)

Retained by the Chief Engineer

Retained by the Electro-Technical Officer only

Kept inside the engine control room safety locker

Detailed Explanation & Context

Under marine HV safety rules, the Authorised Person (HV) who issued the Sanction-to-Test retains custody of safety lock keys and personally oversees the removal and re-application of earths.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).

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