Podcast
Questions and Answers
What is the purpose of fitting double (nested) valve springs in a four-stroke diesel engine?
What is the purpose of fitting double (nested) valve springs in a four-stroke diesel engine?
- To provide greater valve control and prevent valve float (correct)
- To increase engine efficiency
- To reduce engine emissions
- To improve fuel combustion
Why may too small a tappet clearance in a four-stroke diesel engine have negative effects?
Why may too small a tappet clearance in a four-stroke diesel engine have negative effects?
- It increases engine durability
- It improves engine power output
- It leads to lower fuel consumption
- It may cause valve sticking and incomplete closing (correct)
What is the role of zinc anodes in air coolers on marine vessels?
What is the role of zinc anodes in air coolers on marine vessels?
- To regulate air flow
- To prevent galvanic corrosion (correct)
- To enhance heat transfer efficiency
- To maintain optimal coolant temperature
Why are vent cocks installed in air coolers on marine vessels?
Why are vent cocks installed in air coolers on marine vessels?
Which procedure involves testing the set points on diesel generator HT cooling water, high-temperature alarm, and shutdown manually?
Which procedure involves testing the set points on diesel generator HT cooling water, high-temperature alarm, and shutdown manually?
In a Bosch or jerk type fuel injection pump, how is the delivered quantity of fuel oil controlled?
In a Bosch or jerk type fuel injection pump, how is the delivered quantity of fuel oil controlled?
What is the primary purpose of the delivery valve in a fuel injection pump?
What is the primary purpose of the delivery valve in a fuel injection pump?
Which of the following is NOT a method of cylinder liner lubrication in medium speed diesel engines?
Which of the following is NOT a method of cylinder liner lubrication in medium speed diesel engines?
What is a potential effect of insufficient lubrication in a diesel engine?
What is a potential effect of insufficient lubrication in a diesel engine?
Which of the following statements about plate type heat exchangers is correct?
Which of the following statements about plate type heat exchangers is correct?
Which of the following is NOT an advantage of plate type heat exchangers compared to tube type heat exchangers?
Which of the following is NOT an advantage of plate type heat exchangers compared to tube type heat exchangers?
Which of the following safety interlocks is NOT commonly fitted to a direct air start medium speed diesel engine?
Which of the following safety interlocks is NOT commonly fitted to a direct air start medium speed diesel engine?
In relation to the crank angle and valve timing, when does the air start valve open on a four-stroke diesel engine?
In relation to the crank angle and valve timing, when does the air start valve open on a four-stroke diesel engine?
When inspecting a cylinder liner and piston assembly after removal from the engine, which of the following faults is NOT likely to be found?
When inspecting a cylinder liner and piston assembly after removal from the engine, which of the following faults is NOT likely to be found?
