MOTOR M E O CLASS – IV
Q1. If exhaust temperature of one unit is high. What could be the
reason?
Reasons:
- ·
Leaky injector - ·
Leaky exhaust valve - ·
Scavenge fire - ·
Incorrect fuel injection timing - ·
Incorrect fuel pump setting - ·
Scavenge ports choked - ·
Temperature indicator faulty
Q2. What are the Tests you will carry out on Lube Oil.
Answer:
- Water content
- Alkalinity
- Viscosity
- Drop test
1 horse power = 746 watt = 0.746 kw
Q4. What are the safeties you will find on steering gear system?
Steering safeties
Relief shock valves- Buffer relief valves
- By pass valves
- Isolating valves
- Replenishing pump
- Standby pump
- Motor overload alarm
- Hydraulic oil low pressure alarm
- Tank low level alarm
- Control system failure alarm
- Steering failure alarm
- Power failure alarm.
Q5. How you will put the gauge in cylinder liner.
Template in Forward-Aft and port starboard direction.
Various points from top to bottom.
Q6. What is power?
Rate of
doing the work is known as power.
Q7. What could be the reason if spark coming from funnel.
Reasons:
- Exhaust
valve leaking, - After
burning - Late injection
- Exhaust
Gas Boiler fire - Fuel
pump timing incorrect
Q8. What are the cause of Heavy Oil and Lube Oil purifier overflow?
Cause:
- Throughput
high - Sludge
deposits - Sealing
water low - Improper gravity disc
Q9. What are the symptoms of piston running hot?
Piston cooling oil outlet temp high
Q10. if an air inlet is leaking, how do we know?
Relief valve/ bursting disc will lift
Starting airline will be hot
Q11. What are the reasons exhaust valve is
leaking in any cylinder?
High exhaust temperature- Loss of compression pressure
- Spark from funnel
Q12. What will you do if jacket temperature of Auxiliary engine increases.
Change over jacket water cooler or put both coolers in service.
Q13. What are the types of Scavenging’?
Loop scavenging- Cross scavenging
- Uni-flow scavenging
Q14. What is after burning and what are the symptoms?
Exhaust temp high- Uneconomic running,
- Reduction in thermal efficiency
- Loss of power,
- Fouling from carbon deposits
- Overheating in exhaust system
temperature, after burning, uneconomic running
Q17. What is the first symptom of Scavenge fire?
Scavenge air temperature will Increase- Exhaust temperature will get increased
- Surging will start
- Smoke from Turbo Charger air inlet,
- Smoke and noise
Q18. What are the symptoms of piston crack and liner crack?
Rapid rise in sump level
piston cooling temperature high
Q19. If piston cooling and jacket cooling temperatures start going
high. What will you check?
The following checks should be carried
out
- Preheat setting,
- Jacket Cooling Water temperature controller
- Purge oil from controller
- LT cooling temp high
Q20. What could be the reasons for Piston seize?
Cylinder lubrication inadequate