Fire Engineering Chapter 4 Quiz

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Questions and Answers

What is the maximum distance a person should travel to reach a fire extinguisher for Class A hazards?

15 m (correct)

25 m

10 m

20 m

What is the minimum size of a fire extinguisher required on each level of a building for Class A hazards in a low hazard classification?

21A

10A

13A (correct)

34A

How much floor area can be covered by each unit of

20 m2

10 m2

15 m2 (correct)

25 m2

What is indicated as undesirable in the selection of fire extinguishers?

Both A and B Signup and view all the answers

According to the guidelines for fire extinguishers, where should they be located?

Conspicuously and readily accessible Signup and view all the answers

What is one requirement for portable fire extinguishers in all-purpose groups, excluding residential floors?

They must be tested and maintained in operational condition. Signup and view all the answers

Which of the following is NOT considered a common extinguishing agent?

Aerosol Sprays Signup and view all the answers

Which code specifies the requirements for the use and maintenance of portable fire extinguishers?

SS 578 Signup and view all the answers

What does the letter in the designation of an extinguisher (like 13A) represent?

The class of fire the extinguisher is suited for Signup and view all the answers

What is an essential aspect of the marking of fire extinguishers?

Must indicate the type of extinguishing agent used. Signup and view all the answers

Which of the following statements about maintenance, inspection, and recharging of fire extinguishers is incorrect?

They can be ignored if the extinguishers appear undamaged. Signup and view all the answers

Which class of fire does Class B correspond to?

Flammable liquids Signup and view all the answers

What is the maximum length of a Class A test fire designated as 27A?

2.7 m Signup and view all the answers

What does the SS EN3 series regulate?

Specifications for portable fire extinguishers. Signup and view all the answers

What class of fires is commonly associated with flammable liquids and gases?

Class B Signup and view all the answers

For test fires greater than 27A, what must be used to construct the fire?

Multiple smaller fires Signup and view all the answers

How should fire extinguishers be placed in a building?

In easily accessible locations throughout the building. Signup and view all the answers

Which class does not have a fire test rating according to the provided information?

Class C Signup and view all the answers

What material is used for the Class A fire test?

Pinus sylvestris Signup and view all the answers

What must manufacturers prove for Class C extinguishers?

Their suitability for a particular class of fire Signup and view all the answers

What is the cognitive load of the Class D extinguishers based on?

Specific combustible metal fires Signup and view all the answers

What is the maximum travel distance to extinguishers for a low hazard rated 21B?

5 meters Signup and view all the answers

Which combination of extinguishers meets the 100A rating requirement?

1 X 43A + 5 X 13A Signup and view all the answers

Which of these options cannot be used to fulfill the protection requirements for high hazard types (144B)?

2 X 55A Signup and view all the answers

What is the feasibility of using a combination of 2 X 55A fire extinguishers?

Cannot meet 15m requirement Signup and view all the answers

Which combination results in a total rating less than 100A?

4 X 21A Signup and view all the answers

What is the total minimum extinguisher rating required for a medium hazard?

70B Signup and view all the answers

Which of the following options illustrates a feasible configuration for low hazard protection?

1 X 43A + 5 X 13A Signup and view all the answers

What is the maximum travel distance to extinguishers for a high hazard rated 144B?

15 meters Signup and view all the answers

Which class of fire can be extinguished using water types?

Class A Fire Signup and view all the answers

What is the maximum number of extinguishers with a rating of 21B or higher that can be combined?

3 extinguishers Signup and view all the answers

Which type of fire extinguisher should be used for Class D fires?

Agents approved for specific combustible metal hazards Signup and view all the answers

What is the total weight limit for a fully-charged fire extinguisher?

20 kg Signup and view all the answers

Which fire class can be extinguished with carbon dioxide extinguishers?

Class C Fire Signup and view all the answers

What is a common agent used for extinguishing Class B fires?

BC powder Signup and view all the answers

Which agent is specifically recommended for Class F fires?

Wet Chemical Signup and view all the answers

The selection of fire extinguishers should take into account which of the following?

Health/Safety requirements and other factors Signup and view all the answers

Study Notes

Learning Outcomes

Explain the requirements for fire extinguisher provisions.
Detail types of fire extinguishers and their extinguishing agents.
Outline testing, design, and placement of fire extinguishers.
Discuss maintenance, inspection, and recharging requirements for fire extinguishers.

Regulations and Codes

Singapore Fire Code mandates portable fire extinguishers for all-purpose groups, excluding residential floors.
SS 578 requires extinguishers to be charged, tested, and maintained, with proper tagging in compliance.
SS EN3 specifies construction standards for portable fire extinguishers.

Extinguishing Agents

Common extinguishing agents include water, carbon dioxide, dry powder, foam, and wet chemicals.
Extinguishers are designated by a number (indicating fire size) followed by a letter (indicating class of fire).

Ratings and Classes of Extinguishers

Class A: Wood crib testing, with specific sizes rated from 5A (5 wooden sticks) to 55A (55 wooden sticks).
Class B: Flammable liquid tray.
Class C: No test conducted (manufacturers provide suitability proof).
Class D: Specific combustible metal fires.
Class F: Cooking oil tray.

Selection of Fire Extinguishers

Class A: Maximum travel distance to extinguishers is 15 meters. At least one extinguisher of minimum size required on each building level.
Minimum extinguisher sizes vary by building type: 13A for low, 21A for medium, 34A for high hazards.
Coverage area for each “A” rating extinguisher is 15 m²; avoid over-provisioning low-rated extinguishers.

Placement and Accessibility

Extinguishers must be located where they are easily accessible during a fire event.
Combinations of different extinguisher ratings can be used to meet required ratings.

Class B Hazard Requirements

Minimum extinguisher ratings range from 21B for low hazards to 144B for high hazards, with specific maximum travel distances of 5 to 15 meters.

General Requirements for Extinguishers

Fully charged extinguishers should not exceed 20 kg in total weight.

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Description

This quiz covers the essential requirements and provisions for portable fire extinguishers as outlined in Chapter 4 of Fire Engineering Fundamentals. Test your understanding of these safety measures and ensure you are equipped with the knowledge necessary for effective fire prevention.