To comply with current building regulations, the minimum cavity width in an external wall is ____

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RRB JE CE 28 Aug 2019 (Shift 1) CBT 2 Official Paper
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  1. 70 mm
  2. 50 mm
  3. 100 mm
  4. 60 mm

Answer (Detailed Solution Below)

Option 2 : 50 mm
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The cavity size should be in between 40 to 100 mm. The internal and external leaves should have at least 10 mm thick.

∴ The most appropriate answer would be 50 mm.

Important Points:

Advantage of having cavity in external walls:

1. To give better thermal insulation. It is because of the space provided between two leaves of cavity walls is full of air and reduces heat transmission into the building from outside.

2. Moisture content in outer atmosphere is does not allowed to enter because of hollow space between leaves. So, prevent dampness.

3. They also act as good sound insulators.

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-> RRB JE Civil Engineering Exam Dates have been announced on the official website. The CBT 2 Examination is scheduled for 22nd April 2025. 

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-> A total of 7911 vacancies have been announced for the role of Junior Engineer.

-> So this is a great job opportunity for candidates with a Diploma/Engineering background to work for an organization like Indian Railways.

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