Explanation: Building line or Set-back is provided to avoid traffic congestion in front of the building. Buildings like mall, multi-complexes, factories, etc. which attract a large number of vehicles, should have be set-back a further distance apart from the building line. This line after this extra margin is called as Control Line.

Explanation: As long has materials and workmanship are of good quality, timber structures can perform very well in an earthquake. A wooden frame is usually considered to have medium to low vulnerability towards earthquake.

Explanation: Properly insulated building cuts down the cost of electric burning in summer as well as in winter. Cavity walls are one of the types of thermal insulation which consists of two walls with cavity in between them.

Explanation: Building Regulations of U.K. specifies that the wall ties should be placed at distances apart not exceeding 450 mm vertically and 900 mm horizontally. There should be at least 5 ties per square meter of the wall.

Explanation: Composite masonry is the one that is constructed out of two or more than two types of building units or in which different types of building materials are used for construction. It is of the following types – stone composite masonry, brick stone composite masonry, cement concrete masonry, hollow clay tile masonry, reinforced brick masonry, and glass block masonry.

Explanation: When the height above floor level exceeds about 1.5 m a temporary structure, usually of timber, is erected close to the work to provide a safe working platform for the workers and to provide limited space for the storage of plant and building materials. This temporary Framework is known as scaffolding or simply of scaffold.

Explanation: Timber floor consists of Plank of wood with 25 mm thickness which is supported by joist with size of 50 mm×75 mm to 100 mm. Timber was most preferred building material as compared to bamboo as Timber was cheap and easily available.

Explanation: A roof basically consists of structural element provided at the top of building from the support of roof coverings. The structural element maybe trusses, portals, slabs, domes, etc. and the roof covering maybe AC sheets, GI sheets, etc.

Explanation: Internal Hazard concerns damage or destruction of the building itself and it is directly related to the fire load which, in turn, enables the building to be graded when considered along with the duration of fire.

Explanation: Double wall cofferdam was frequently used on the river Ohio in USA and hence, it derives its name as Ohio river type cofferdam. It is cheap and can be built up rapidly l. It is suitable for hard bed where there is no problem of erosion. This type of cofferdam is unsuitable for deep water.

Explanation: The term Masonry is used to indicate the art of building the structures in either stone or bricks. The formal type is called the stone masonry and the latter type is called the brick masonry.

Explanation: Laterite posses porous and spongy structure which can be easily quarried in blocks and contains high percentage of oxide of iron and also available in different colours. It is mostly used as building stone, Road metal, rough stone masonry work, etc.

Explanation: In Ashlar masonry, the height of stone various from 250 mm to 300 mm. The length of stone should not exceed 3 times the height and the depth into the wall should be at least equal to half the height.

Explanation: Scutch is a tool that is used for cutting soft bricks. A trowel is used for laying the mortar. A jointer is used for pointing the joints while the spirit level is used for levelling.