English Verb Tenses: A Comprehensive Review

Posted by on Feb 9, 2025 in Mechanical Manufacturing | 0 comments

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

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Marine Engine Maintenance and Troubleshooting Q&A

Posted by on Jan 27, 2025 in Mechanical Manufacturing | 0 comments

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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