(a) Define the cooling and starving principles of fire fighting. (b)

1.	(a) Define the cooling and starving principles of fire fighting. (b) What types of joints are generally used in carpentry? Mention any four of them.
Answer» (a) Cooling. This is done by bringing down the temperature or removing the heat. The best agent of cooling is water, which is freely available in ships for fighting the fire. Water must be applied to burning materials and not to the flames. (b) Starving. It is to remove all inflammable materials in the vicinity of fire so that fire does not spread further and is automatically put off. B Types of joints used in Carpentry. The following joints are generally used in carpentry:- (a) Lap joint. (full lap and half lap) (b) Halving joint. (angle halving joint. Dovetail halving joint and cross halving joint). (c) Mortise and tendon joints. (d) Bridle joints. (e) Tongue and groves joints.

(a) Define the cooling and starving principles of fire fighting. (b) What types of joints are generally used in carpentry? Mention any four of them.

Answer»

(a) Cooling. This is done by bringing down the temperature or removing the heat. The best agent of cooling is water, which is freely available in ships for fighting the fire. Water must be applied to burning materials and not to the flames.

(b) Starving. It is to remove all inflammable materials in the vicinity of fire so that fire does not spread further and is automatically put off.

B Types of joints used in Carpentry.

The following joints are generally used in carpentry:-

(a) Lap joint. (full lap and half lap)

(b) Halving joint. (angle halving joint. Dovetail halving joint and cross halving joint).

(d) Bridle joints.

(e) Tongue and groves joints.

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