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SarkariResultOutBMS · 2024

Previous Year Question

The onsite fuel supply at the diesel engine should consider which of the following requirements?
  1. Maximum duration of the largest fire risk plus a safety factor.
  2. The time required for the fire pump to completely draw down stored firewater supplies that cannot be immediately replenished.
  3. A minimum of at least 5.07 liters/kilowatt (one gal. per horsepower) rating of the firewater pump driver
  4. All of the above.

Correct answer: D

Explanation

Diesel fire-pump fuel supply must be sufficient for the required emergency operating duration and is sized with regard to available fire-water duration and the driver fuel requirement/rating. Since all the listed considerations are relevant, option D, “all of the above,” is correct.

Formula

Fuel capacity ≥ required emergency consumption for specified duration

Step-by-step solution

Onsite Fuel Sizing explanatory diagram

Correct Answer

D — All of the above.

Concept and Reasoning

Diesel fire-pump fuel supply must be sufficient for the required emergency operating duration and is sized with regard to available fire-water duration and the driver fuel requirement/rating. Since all the listed considerations are relevant, option D, “all of the above,” is correct.

Calculation / Key Relation

Fuel capacity ≥ required emergency consumption for specified duration

Exam Takeaway

Fire-pump fuel sizing is a duration-and-driver-rating problem, not a single-number rule.

Common Mistake

Do not size fuel only from engine rating while ignoring required emergency duration.

Common mistake

Do not size fuel only from engine rating while ignoring required emergency duration.

Exam tip

Fire-pump fuel sizing is a duration-and-driver-rating problem, not a single-number rule.

Quick method

Fire-pump fuel sizing is a duration-and-driver-rating problem, not a single-number rule.