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Demolition and structural stability questions for the CSCS MAP test

4 free questions on Demolition and structural stability, from section D. High risk activities. Every question is original and explains why each option is right or wrong.

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Question 1

Medium ·Link to this question (question 1)

You are reviewing a plan for demolishing a warehouse.

What must the plan prevent?

Choose one answer.

  1. A. Dust from reaching the demolition workers only
  2. B. The job taking longer than the agreed programme
  3. C. Noise from the machines affecting the client's staff
  4. D. Any uncontrolled collapse of the structure
Show the answer and explanation

Answer: D

  • A. Wrong: Wrong. Dust control matters, but the key is to prevent uncontrolled collapse.
  • B. Wrong: Wrong. Safety comes before the programme.
  • C. Wrong: Wrong. Noise matters, but the plan must above all prevent uncontrolled collapse.
  • D. Right: Right. HSE says demolition must be planned and carried out to prevent danger, and avoid uncontrolled collapse.

Explanation

Demolition must be planned in writing by a competent person to prevent uncontrolled collapse.

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Question 2

Medium ·Link to this question (question 2)

A building due for demolition is next to a busy road.

What should the demolition plan include?

Choose one answer.

  1. A. Exclusion zones sized for the method
  2. B. Only a sign saying "demolition in progress"
  3. C. A plan to work only at night to avoid traffic
  4. D. Nothing about the road, as it is outside the site
Show the answer and explanation

Answer: A

  • A. Right: Right. HSE says exclusion zones and debris zones depend on the demolition method, and must protect people.
  • B. Wrong: Wrong. A sign doesn't keep people away from falling debris.
  • C. Wrong: Wrong. Timing may help, but exclusion zones are still needed.
  • D. Wrong: Wrong. People outside the site must be protected too.

Explanation

Plan exclusion zones for the demolition method, so debris can't reach people, including the public.

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Question 3

Medium ·Link to this question (question 3)

A scaffold has been put up around a building being demolished.

Can the exclusion zone be made smaller because of the scaffold?

Choose one answer.

  1. A. Yes, by about half, as the scaffold will catch most debris
  2. B. Yes, the zone can be removed altogether
  3. C. Only at weekends
  4. D. No
Show the answer and explanation

Answer: D

  • A. Wrong: Wrong. The scaffold doesn't reduce the zone.
  • B. Wrong: Wrong. The zone is still needed.
  • C. Wrong: Wrong. The zone is needed whenever there is a risk.
  • D. Right: Right. HSE says a scaffold does not allow the exclusion zone to be reduced.

Explanation

Exclusion zones depend on the demolition method. A scaffold doesn't justify making them smaller.

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Question 4

Medium ·Link to this question (question 4)

A wall is to be removed to make an opening in an existing building.

Who should decide the method and design of temporary supports?

Choose one answer.

  1. A. A competent person, after a survey
  2. B. The newest labourer on site
  3. C. Whoever has the biggest hammer
  4. D. Nobody, as the wall can just be knocked out
Show the answer and explanation

Answer: A

  • A. Right: Right. HSE says a competent person should survey and assess the structure and decide the method and the design of temporary supports.
  • B. Wrong: Wrong. This needs a competent person.
  • C. Wrong: Wrong. This needs planning and design.
  • D. Wrong: Wrong. That could cause a collapse.

Explanation

Alterations need a structural survey and a competent person to plan the method and temporary supports.

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