CHIEF ENGINEER Unit 13 Q1

1 / 11

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

A) It increases the pump's output

D) It improves the pump’s suction power

C) It causes cavitation, reducing pump efficiency

B) It has no effect on the pump

2 / 11

What is the primary purpose of Continuous Class Machinery Surveys?

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

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

3 / 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

4 / 11

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

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

A) Only fuel systems

D) Bridge navigation systems

C) Non-essential interior equipment

5 / 11

How do Continuous Class Machinery Surveys benefit vessel operators?

A) They reduce the vessel’s overall operational time

B) They allow machinery inspections to be spread over time

D) They eliminate the need for machinery maintenance

C) They require less reporting to authorities

6 / 11

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

C) Efficient fuel mixing

B) Engine wear and reduced performance

A) Precise course adjustments

D) Minimal cargo load

7 / 11

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

B) It restricts fluid flow, reducing output

C) It has no impact on the pump

D) It improves fluid velocity in the pump

A) It increases output by filtering more debris

8 / 11

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

B) It has no impact on fuel efficiency

D) It decreases drag, improving fuel efficiency

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

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

9 / 11

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

A) Increased vessel weight due to cargo

C) Favorable sea conditions

D) Updated navigation equipment

B) Reduced crew size

10 / 11

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

D) Increased water temperature

C) Reduced pressure at discharge

A) Low suction lift

B) Impeller damage or wear

11 / 11

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

A) To ensure continuous compliance with class standards

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

B) To catch issues before they become major problems

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

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