Engine Room Essentials: 20 Key Questions Answered
Why do we have tappet clearance?
For thermal clearance.
What does scavenge mean?
Using fresh air to remove spent gases.
Name two types of engine sensors and their operation.
Temperature and Pressure sensors.
TDC is used as a basis for what?
Reference point for exhaust inlet valves and fuel injection.
What does reduction mean with regard to a gearbox?
The use of a smaller gear to turn a larger one.
Explain the difference between 2-stroke and 4-stroke cycles.
A two-stroke engine is lighter, less efficient, and
English Verb Tenses: A Comprehensive Review
Simple Present
Affirmative: Subject + Verb (infinitive without ‘to’). In the third person, add -s or -es to the verb.
Example: I read my book. / He reads his book.
Interrogative: Do/Does + Subject + Verb (infinitive without ‘to’) + Complement.
Example: Do you read the book? / Does he read the book?
Negative: Subject + do/does + not + Verb (infinitive without ‘to’).
Example: I do not read the book. / He does not read the book.
Simple Past
Affirmative: Subject + Verb (past form – usually ending in -ed, or
Read MoreMarine Engine Maintenance and Troubleshooting Q&A
1. Why Do We Have Tappet Clearance?
For thermal clearance.
2. What Does Scavenge Mean?
Using fresh air to remove spent gases.
3. Name Two Types of Engine Sensors and Their Operation?
- Temperature
- Pressure
4. TDC Is Used as a Base
Reference point for exhaust inlet valves and fuel injection.
5. What Does Reduction Mean with Regard to a Gearbox?
The use of a smaller gear to turn a larger one.
6. Explain the Difference Between 2-Stroke and 4-Stroke Cycles
A two-stroke engine is lighter, less efficient, and fuel
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