Chapter 1 To 2

Question 1

State 3 reasons accidents happen in a construction site.

Answer 1

Lack proper preventive measure
Lack of proper training for operation/workers are not well trained.
Errors in human judgement

Question 2

State 3 safety practices of falls from.height and struck by falling objects.

Answer 2

• Provide overhead protevtion arnd the building which is under construction
• Provide proper barriers such as guard rail and toe board.
• workers are to put on safety boots.

Question 3

Name 3 constituents materials of concrete

Answer 3

Aggeregate, Cement & water

Question 4

Six stages of concrete production

Answer 4

Transporting, Mixing, Batching, Placing, Compacting and Curing.

Question 5

3 types of test for concrete

Answer 5

Slump test, compacting factor test, compressive strength test

Question 6

3 types of foundation

Answer 6

Strip foundation, RC pad Foundation, Raft Foundation

Question 7

3 advantages of using replacement piles.

Answer 7

No risk of ground heave
Can be installed with lesser noise and foundation
Can be installed in very long lengths and very larges bases can be made in favourable grounds.

Question 8

Explain the difference between end bearing & skin friction piles.

Answer 8

End bearing piles: the shaft of the piles act as columns carryig the loads through the overlaying weak subsoil to a stronger and firmer lower strata in which case the pile gaind most of its support by end bearing.

Skin Friction: the pile passes through the stiff clay and is mainly held up by the frictional resistence between the surface of the pile and the adjoining ground.

Question 9

3 safety practies for electrocution

Answer 9

Proper earthing, usage of earth leakage circuits and use of personal protective equipment such as boots and gloves.

Question 10

3 advantages of using displacement piles

Answer 10

Can be driven to a pre determined set
Any construction operations are unaffected by ground water level
Pile’s carrying capacity can be monitored during the piling process.