HV - High Voltage Safety Officer & Switchgear Operations Exit Exam Questions - Set 2

Question 1

What is the function of a Synchroscope on an HV switchboard during generator paralleling?

Accepted Answer

C: Indicate phase angle alignment and frequency difference between incoming generator and live busbar

Answer

A: Test insulation

Answer

B: Measure fuel

Answer

D: Measure oil pressure

Question 2

What risk occurs if a generator breaker is closed out of phase (e.g. 180° out of phase) with live HV busbar?

Accepted Answer

B: Severe mechanical torque shock shearing generator shaft, massive fault current, and switchboard explosion

Answer

A: Engine stops

Answer

C: Slight light dim

Answer

D: Smooth speed up

Question 3

What is an HV Competent Person (HVCP) under marine safety management systems?

Accepted Answer

B: Person trained and authorized to perform specific HV work under supervision of an HV Authorised Person

Answer

A: Steward

Answer

C: Any crew member

Answer

D: Deck apprentice

Question 4

What publication provides detailed rules for Electrical Installations on Ships including High Voltage (IEC 60092)?

Accepted Answer

C: IEC 60092 Standards / SOLAS Chapter II-1

Answer

A: IMDG Code

Answer

B: MARPOL Annex VI

Answer

D: STCW Table A-II/1

Question 5

How frequently must operational drills and practical checks for regulatory compliance and STCW code requirements be conducted for High Voltage Safety & Switchgear?

Accepted Answer

B: At least monthly or as mandated by SOLAS and shipboard safety management system (SMS)

Answer

A: Only when requested by port State control inspectors

Answer

C: Annually prior to vessel drydocking

Answer

D: Once every 5 years during special survey

Question 6

What documented record must be maintained on board following completion of tasks related to regulatory compliance and STCW code requirements in High Voltage Safety & Switchgear?

Accepted Answer

B: Entry in the official Deck or Engine Logbook recording date, time, and operational parameters

Answer

A: No written record is required

Answer

C: Verbal update to port agent without logging

Answer

D: Unsigned note on the shipboard notice board

Question 7

What safety enclosure rating (IP Rating) is required for High Voltage marine switchboard cubicles?

Accepted Answer

D: IP2X minimum (protection against touch) up to IP44/IP54 for splash protection

Answer

A: IP00

Answer

B: IP10

Answer

C: No rating

Question 8

What is the function of a High Voltage bus tie breaker?

Accepted Answer

B: Connects or isolates two separate HV busbar sections for operational flexibility and redundancy

Answer

A: Ties ropes

Answer

C: Connects battery charger

Answer

D: Regulates water

Question 9

What device measures temperature continuously inside HV motor or generator stator windings?

Accepted Answer

C: Resistance Temperature Detectors (RTD - PT100) or Thermocouples

Answer

A: Pressure gauge

Answer

B: Glass thermometer

Answer

D: Hydrometer

Question 10

What procedure is followed during Sanction to Test on High Voltage equipment?

Accepted Answer

A: Temporarily remove safety earths under strict control to perform insulation or hi-pot testing, then re-earth

Answer

B: Remove warning signs

Answer

C: Turn on generator full load

Answer

D: Cancel permit

Question 11

What is High Potential (Hi-Pot) dielectric testing on HV cables?

Accepted Answer

B: Applying elevated DC/AC voltage (e.g. 2x rated voltage) to verify cable dielectric withstand strength

Answer

A: Testing battery with bulb

Answer

C: Measuring length

Answer

D: Checking cable color

Question 12

What is the function of a surge arrestor connected to HV generator terminals?

Accepted Answer

C: Divert high-voltage switching surges and lightning spikes safely to ground

Answer

A: Cool generator

Answer

B: Reduce noise

Answer

D: Increase generator power

Question 13

What risk occurs if an HV circuit breaker is closed into a solid phase-to-phase short circuit fault?

Accepted Answer

A: Massive fault current flows; instantaneous overcurrent relays must trip breaker within cycles

Answer

B: Heats up slowly over hours

Answer

C: Voltage increases smoothly

Answer

D: Speed increases

Question 14

What safety floor matting must be placed in front of marine High Voltage switchboards?

Accepted Answer

D: Tested dielectric insulating rubber matting (rated for operating voltage, e.g. 15 kV - 30 kV rating)

Answer

A: Aluminum plate

Answer

B: Steel mesh mat

Answer

C: Wet cloth rag

Question 15

What type of fire extinguisher is mandatory near High Voltage switchboard rooms?

Accepted Answer

C: Carbon Dioxide (CO2) or Clean Agent non-conducting gas extinguishers

Answer

A: Foam pipe

Answer

B: Water jet

Answer

D: Saltwater hose

Question 16

Who keeps primary key to safety padlocks securing an HV isolation point under a Permit to Work?

Accepted Answer

D: The High Voltage Authorised Person (HVAP) / Person in Charge of work

Answer

A: Messman

Answer

B: Anyone on deck

Answer

C: Pilot

Question 17

What type of personal protective equipment (PPE) is essential when handling regulatory compliance and STCW code requirements under High Voltage Safety & Switchgear guidelines?

Accepted Answer

C: Certified task-specific PPE meeting SOLAS/IMO performance standards

Answer

A: Standard street clothing with rubber gloves

Answer

B: Basic cotton coveralls without eye or foot protection

Answer

D: High-visibility vest only

Question 18

What parameter must be verified prior to authorizing enclosed space entry for regulatory compliance and STCW code requirements related to High Voltage Safety & Switchgear?

Accepted Answer

D: Atmospheric oxygen level at 20.9% and zero toxic/flammable gas concentration

Answer

A: Visual inspection through access hatch without gas testing

Answer

B: Temperature check only

Answer

C: Oxygen level at 15% with ventilation turned off

Question 19

What is the function of a zero-sequence current transformer (ZSCT) in core-balance earth fault protection?

Accepted Answer

C: Detect vector sum of 3-phase currents; any non-zero value indicates earth leakage current

Answer

A: Control temp

Answer

B: Measure RPM

Answer

D: Measure battery

Question 20

What is the effect of harmonics generated by large High Voltage variable frequency drives (VFD)?

Accepted Answer

D: Voltage waveform distortion, overheating of transformers/generators, and electronic interference

Answer

A: Cleans contacts

Answer

B: Reduces cable size

Answer

C: Increases efficiency 50%

Question 21

What maintenance step is required before cleaning HV switchboard busbar compartments?

Accepted Answer

A: Complete isolation, prove dead, apply portable earths, post warning signs, and issue HV PTW

Answer

B: Spray solvent live

Answer

C: Blow compressed air live

Answer

D: Wipe live with damp cloth

Question 22

What is the function of an Automatic Voltage Regulator (AVR) on an HV generator?

Accepted Answer

A: Control generator field excitation to maintain steady terminal voltage under changing load

Answer

B: Measure oil pressure

Answer

C: Cool bearings

Answer

D: Control engine RPM

Question 23

What is the purpose of an anti-condensation heater fitted inside HV electric motors and switchboards?

Accepted Answer

D: Maintain internal temperature slightly above ambient when stopped to prevent moisture condensation

Answer

A: Heat engine room

Answer

B: Warm lube oil

Answer

C: Dry clothes

Question 24

What safety precaution must be observed when using a high voltage test probe to prove equipment dead?

Accepted Answer

B: Test probe on known live source FIRST, test target equipment, then re-test probe on known live source ('Live-Dead-Live' test)

Answer

A: Use low voltage light

Answer

C: Test on table

Answer

D: Assume indicator works

Question 25

What device trips an HV transformer if gas accumulation or oil surge occurs due to internal fault?

Accepted Answer

C: Buchholz Relay

Answer

A: Speed governor

Answer

B: Thermocouple

Answer

D: Reverse power relay

Question 26

What is the purpose of Lockout / Tagout (LOTO) padlocks on HV isolators?

Accepted Answer

D: Physically lock isolator handles in OPEN/OFF position with warning tags so no one can re-energize circuit

Answer

A: Prevent theft

Answer

B: Hold door open

Answer

C: Decorate panel

Question 27

What action must be taken immediately if a colleague contacts a High Voltage live conductor and collapses?

Accepted Answer

D: DO NOT touch victim directly; isolate HV power source immediately or use certified HV insulating rescue hook to pull victim away, then call emergency CPR

Answer

A: Throw water

Answer

B: Grab victim's arm bare hands

Answer

C: Run away

Question 28

Who has overall responsibility for enforcing High Voltage safety management systems on board?

Accepted Answer

D: The Chief Engineer and Ship's Master

Answer

A: Ship cook

Answer

B: Port Agent

Answer

C: Shore electrician

Question 29

What key responsibility belongs to seafarers performing watchkeeping duties for regulatory compliance and STCW code requirements under High Voltage Safety & Switchgear?

Accepted Answer

A: Continuous monitoring of operational parameters and immediate reporting of anomalies

Answer

B: Operating equipment beyond design pressure limits

Answer

C: Bypassing safety trips during routine operations

Answer

D: Leaving watchkeeping station unattended

Question 30

Which document contains detailed hazard data and emergency handling instructions for substances involved in regulatory compliance and STCW code requirements during High Voltage Safety & Switchgear?

Accepted Answer

C: Safety Data Sheet (SDS) / Material Safety Data Sheet (MSDS)

Answer

A: Bill of Lading description

Answer

B: Crew List document

Answer

D: Ship's Cargo Manifest summary page

High Voltage Safety Officer & Switchgear Operations (HV) (Set 2)

What is the function of a Synchroscope on an HV switchboard during generator paralleling?

Questions in HV Set 2

Question Discussion & Notes

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