CHIEF ENGINEER Unit 13 Q1

1 / 11

How does air entrainment affect the performance of a centrifugal pump?

D) It improves the pump’s suction power

A) It increases the pump's output

C) It causes cavitation, reducing pump efficiency

B) It has no effect on the pump

2 / 11

Which of the following is NOT a goal of Continuous Class Machinery Surveys?

B) To catch issues before they become major problems

D) To reduce the need for a full survey at once

A) To ensure continuous compliance with class standards

C) To allow machinery to operate without maintenance for extended periods

3 / 11

Which of the following defects can reduce the output of a centrifugal pump?

D) Increased water temperature

A) Low suction lift

C) Reduced pressure at discharge

B) Impeller damage or wear

4 / 11

How do Continuous Class Machinery Surveys benefit vessel operators?

B) They allow machinery inspections to be spread over time

D) They eliminate the need for machinery maintenance

A) They reduce the vessel’s overall operational time

C) They require less reporting to authorities

5 / 11

What aspect of vessel machinery is covered under Continuous Class Machinery Surveys?

B) Critical machinery and equipment necessary for vessel safety and operation

D) Bridge navigation systems

A) Only fuel systems

C) Non-essential interior equipment

6 / 11

What is the primary purpose of Continuous Class Machinery Surveys?

A) To perform a one-time inspection of all machinery

B) To conduct regular, scheduled inspections to maintain class status

D) To eliminate the need for annual surveys

C) To overhaul machinery only when breakdowns occur

7 / 11

Which of the following operational issues can cause a vessel’s fuel efficiency to be less than its sea trials?

A) Precise course adjustments

C) Efficient fuel mixing

D) Minimal cargo load

B) Engine wear and reduced performance

8 / 11

What effect does a clogged strainer have on a centrifugal pump’s output?

B) It restricts fluid flow, reducing output

A) It increases output by filtering more debris

D) It improves fluid velocity in the pump

C) It has no impact on the pump

9 / 11

What impact does poor weather have on fuel efficiency compared to sea trial data?

D) It only affects fuel efficiency in port

B) It decreases fuel efficiency due to added resistance and rougher seas

A) It increases fuel efficiency by allowing the vessel to sail faster

C) It has no effect on fuel efficiency

10 / 11

Which of the following factors can reduce the fuel efficiency of a vessel compared to sea trial data?

C) Favorable sea conditions

A) Increased vessel weight due to cargo

B) Reduced crew size

D) Updated navigation equipment

11 / 11

How does hull fouling affect a vessel’s fuel efficiency?

C) It increases drag, requiring more fuel to maintain speed

B) It has no impact on fuel efficiency

A) It improves fuel efficiency by adding weight to the hull

D) It decreases drag, improving fuel efficiency

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