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WorksheetsClass 2 CC Explosion
Total questions: 10
Worksheet time: 10mins
What are the components of fire triangle?
Heat
Air
Fuel
All are correct
SOLAS regulations to prevent crankcase explosions came into place after a particularly devastative explosion that claimed the lives of 28 people onboard ____
MV Herald Enterprise
MV Reena Dal Pacin
MT Rina Disaster
MV Reina Del Pacifico
What is the flash point of main engine crankcase lubricating oil?
-188 deg C
60 deg C
220 K
220 deg C
SOLAS regulations to prevent crankcase explosions came into place in ____
1964
1947
1974
1800
Crankcase relief door also prevents the exit of flame outside of engine by using a ____
non-return valve
flame arrester
return valve
water spray
Generally, OMD alarm will operate when it reaches a oil mist concentration of ____.
25-50% LEL
2.5-5% HEL
100% LEL
2.5-5% LEL
When oil mist alarm is received, it is required to wait for minimum ____ before opening the crankcase doors.
30 hours
30 seconds
30 minutes
All are correct
Crankcase relief valve should open fully at a pressure of ____.
not greater than 0.02 Mpa
not lesser than 0.2 bar
not greater than 2 bar
not lesser than 2 bar
Additional relief valves are to be fitted for separate spaces on the crankcase, such as gear or chaincases for camshaft or similar drives, when the gross volume of such spaces exceeds ___
6 m3
0.6 m3
0.06 m3
16 m3
For engines of 2250 kW and above or having cylinders of more than ____ bore, oil mist detector or bearing temperature monitor is required.
500 m
600 mm
500 mm
300 mm
