Ship Crankcase Explosion Quiz

Froggy Jumps

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About this activity

Crew safety on marine engines

Created by

MUHAMMAD AKMAR BIN ROSAIDI

United States

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1	MUHAMMAD HAKIMI February 16, 2026	% 100	00:26
2	Hafizzuddin February 16, 2026	% 90	00:39
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4	HarrazHerman February 16, 2026	% 90	02:19
5	MUHAMMAD AKMAR BIN ROSAIDI February 16, 2026	% 80	01:21
6	MUHAMMAD ALIFF HAQIMI February 16, 2026	% 60	01:49

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Froggy Jumps Ship Crankcase Explosion QuizOnline version Crew safety on marine engines by MUHAMMAD AKMAR BIN ROSAIDI 1 What is a crankcase explosion in a ship's engine? a Ignition of flammable vapors inside the crankcase b Explosion of the fuel tank c Collision with another vessel 2 Which condition most commonly leads to crankcase vapor buildup? a Overcooling of cylinders b Sharp turn at high speed c Excess blow-by and oil mist in the crankcase 3 What is the primary preventive measure for crankcase explosions? a Proper crankcase ventilation and oil management b Increasing load limit c Locking the engine room 4 Which gas is mainly involved in dangerous crankcase vapors? a Chlorine gas b Flammable hydrocarbon vapors from oil/fuel c Carbon dioxide 5 Crankcase explosion risk increases with: a Low engine RPM only b Low ambient humidity c High crankcase pressure and hot surfaces 6 What should be avoided to reduce crankcase ignition risk? a Ignition sources near crankcase during maintenance b Ventilating the area well c Using water spray on drums 7 If a crankcase fire starts, what is a key action? a Shut down the engine and isolate the area b Open the crankcase to vent gas c Increase fuel supply to cool it 8 Which routine reduces crankcase vapor buildup? a Rerouting exhaust into the engine bay b Regular oil changes and proper sealing c Overfilling crankcase 9 Crankcase explosions are most likely during: a Maintenance or startup with ignition sources nearby b Idle calm seas at night c Full power at peak performance 10 Which crew member role is critical for crankcase safety? a Bridge navigation officer only b Deck cadet only c Engine room watchkeeping and maintenance staff

Froggy Jumps

Ship Crankcase Explosion QuizOnline version

Crew safety on marine engines

by MUHAMMAD AKMAR BIN ROSAIDI

What is a crankcase explosion in a ship's engine?

Ignition of flammable vapors inside the crankcase

Explosion of the fuel tank

Collision with another vessel

Which condition most commonly leads to crankcase vapor buildup?

Overcooling of cylinders

Sharp turn at high speed

Excess blow-by and oil mist in the crankcase

What is the primary preventive measure for crankcase explosions?

Proper crankcase ventilation and oil management

Increasing load limit

Locking the engine room

Which gas is mainly involved in dangerous crankcase vapors?

Chlorine gas

Flammable hydrocarbon vapors from oil/fuel

Carbon dioxide

Crankcase explosion risk increases with:

Low engine RPM only

Low ambient humidity

High crankcase pressure and hot surfaces

What should be avoided to reduce crankcase ignition risk?

Ignition sources near crankcase during maintenance

Ventilating the area well

Using water spray on drums

If a crankcase fire starts, what is a key action?

Shut down the engine and isolate the area

Open the crankcase to vent gas

Increase fuel supply to cool it

Which routine reduces crankcase vapor buildup?

Rerouting exhaust into the engine bay

Regular oil changes and proper sealing

Overfilling crankcase

Crankcase explosions are most likely during:

Maintenance or startup with ignition sources nearby

Idle calm seas at night

Full power at peak performance

Which crew member role is critical for crankcase safety?

Bridge navigation officer only

Deck cadet only

Engine room watchkeeping and maintenance staff

You can integrate the game into an LMS compatible with LTI 1.1 or LTI 1.3 such as Canvas, Moodle, or Blackboard. This way, the scores will be automatically saved into the platform’s gradebook.

Ship Crankcase Explosion Quiz

Froggy Jumps

About this activity

Created by

Download the paper version to play

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Ship Crankcase Explosion QuizOnline version

by MUHAMMAD AKMAR BIN ROSAIDI

What is a crankcase explosion in a ship's engine?

Which condition most commonly leads to crankcase vapor buildup?

What is the primary preventive measure for crankcase explosions?

Which gas is mainly involved in dangerous crankcase vapors?

Crankcase explosion risk increases with:

What should be avoided to reduce crankcase ignition risk?

If a crankcase fire starts, what is a key action?

Which routine reduces crankcase vapor buildup?

Crankcase explosions are most likely during:

Which crew member role is critical for crankcase safety?

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