Q1: With reference to the construction of refrigerated spaces: (a) state suitable materials that can be used for insulati... | SC&S MEO Class II

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Q1 (16 Marks) Hull Construction

SC&S • Written Exam

With reference to the construction of refrigerated spaces:

(a) state suitable materials that can be used for insulating refrigerated spaces. (3)

(b) state the properties that an insulating material should possess. (3)

(c) sketch a section through a wall of a cold storage space explaining how the insulation is attached to the ship's structure. (10)

Appeared In: Jan 2026

✓ Verified Model Answer (Text Solution)

Structured for DG Shipping MEO Class II examination scoring criteria.

Exam Ready

Part (a)

Suitable materials used for insulating the spaces are

Armaflex (sheet or pipe insulation made from black flexible nitrile elastomer)
Calcium silicate
Polyurethane, pearlite, cork, glass fibre, rock wool, plastic foam

Part (b)

Properties insulating materials should posses are

Low thermal conductivity (high insulating capacity)
Thickness
Fire retardant
Moisture resistance
Vibration resistance
Vermin resistance (vermin - cockroaches and insects)

Part (c)

Internal lining required to retain and protect the insulation may be of galvanised iron, stainless steel or aluminium alloy. The linings are secured to timber grounds which are in turn connected to the steel structure. The linings are made air tight by coating the overlaps with a composition such as white lead and fitting sealing strips. This prevents heat transfer due to circulation of air and prevents moisture entering the insulation.

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