HV Exit Exam • Set 4 Question 11 of 30

Surge overvoltages in high-voltage power networks originate due to:

✓

Direct Answer

Option D: Any of the above

Transient surges are classified into external surges (direct/induced lightning) and internal switching surges (circuit breaker opening/closing on inductive or capacitive loads, fault transients).

All Options

Atmospheric lightning discharges

System switching operations (e.g., tripping inductive/capacitive loads)

Sudden system earth faults and insulation breakdown

Any of the above (Correct Answer)

Detailed Explanation & Context

Transient surges are classified into external surges (direct/induced lightning) and internal switching surges (circuit breaker opening/closing on inductive or capacitive loads, fault transients).

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

Practice Full HV Set 4

Test yourself with 30 interactive questions, live timer, and instant score.

Launch Practice Simulator →

Question Discussion & Notes

Have a doubt, memory trick, or exam update? Share your insights with fellow mariners.

Loading mariner discussions...

« Previous Question Next Question »

More Questions in HV Set 4

View All 30 →

Q1 Which of the following metals has the highest electrical conductivity at room temperature? Q2 In a high-voltage circuit breaker, ionization of the contact gap medium is facilitated by: Q3 If two alternators are operating in parallel synchronism and the excitation voltage of one machine is suddenly increased: Q4 When a vessel suffers an unexpected total electrical blackout, what should be the watch engineer's initial priority action? Q5 What safety precautions must be strictly observed when working on marine High Voltage vessels? Q6 Power loss due to corona discharge on an overhead transmission line is directly proportional to: Q7 Electrical injuries and fatalities on board vessels are commonly caused by: Q8 A synchronous alternator connected to an infinite bus is said to be overexcited when it operates at a: Q9 In a power transformer, the iron (core) loss remains practically constant from no-load to full-load because: Q10 The supply voltage for hand-held portable power tools and inspection lamps in marine accommodation and engine spaces should not exceed 1000 volts.