City Guilds Model Questions Vol1 2018 Engineering Question 8

Practice objective / multiple choice question 8 from the 2018 City Guilds Model Questions Vol1 Engineering examination.

City Guilds Model Questions Vol1 2018 Engineering Objective / Multiple Choice Medium Difficulty
Question 8 CITY_GUILDS_MODEL_QUESTIONS_VOL1 • 2018 • ENGINEERING • objective

A rectangular workshop floor measures \(25\ \text{m}\) by \(10\ \text{m}\) (area \(250\ \text{m}^2\)). The fire‑hazard class is B (flammable liquids). Regulations state that a class‑B fire extinguisher of \(6\ \text{kg}\) capacity can protect up to \(75\ \text{m}^2\), and that no point in the workshop may be farther than \(15\ \text{m}\) from an extinguisher. What is the minimum number of extinguishers required, and how should they be positioned to satisfy both the area‑coverage and distance requirements?

Answer Options

A. Five extinguishers; place them at (5 m,5 m), (5 m,15 m), (15 m,5 m), (15 m,15 m) and (12.5 m,5 m) - more than the minimum required.
B. Four extinguishers; place them at the corners of the workshop (0 m,0 m), (0 m,10 m), (25 m,0 m) and (25 m,10 m) - this exceeds the 15 m distance limit for the centre of the floor.
C. Three extinguishers; place them at the centres of three equal zones (e.g., at (5 m,5 m), (5 m,15 m), and (15 m,10 m)) - this fails the 15 m distance requirement for some corners.
Correct Answer D. Four extinguishers; place them at the centres of the four 50 m² zones (e.g., at (5 m,5 m), (5 m,15 m), (15 m,5 m) and (15 m,15 m)) so that every point is within 15 m.
Correct Answer
D
Correct Option:
Four extinguishers; place them at the centres of the four 50 m² zones (e.g., at (5 m,5 m), (5 m,15 m), (15 m,5 m) and (15 m,15 m)) so that every point is within 15 m.

About This Question

This is City Guilds Model Questions Vol1 2018 Engineering Question 8. It is one of the objective questions from the 2018 City Guilds Model Questions Vol1 Engineering examination.

Difficulty level: Medium .

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