Building Services (22604)
1. How many types of cracks can occur in a building?
Non-moving and Moving are two types of cracks in buildings. Non-moving
cracks are usually shallow and are the result of shrinkage. Moving crack are
wider and are caused due to excessive stress in concrete.
2. Creep in concrete structure increases with:
Creep is small deformation that formed due to concrete loading which is
caused due to increase in temperature and decrease in humidity
3.To control corrosion, concrete with _________ is used.
Less permeability leads to less chance of moisture, chemical absorption
which is the factor for corrosion of steel bars.
4. The main reason for cracks in masonry joints is:
The main reason for cracks in masonry joints is Sulphate content. Cracks
appear after 2-3 years of construction.
5. Shear cracks between the main wall and cross wall can be corrected
using:
Shear cracks appears due to poor bonding between main and cross wall.
This can be corrected using toothing.
6. Which IS code gives details about termite proofing?
IS 6313 part I and II gives detail about termite treatment. Wood,
plastic, leather and rubber can be attacked by termite. Anti termite protection
is therefore used.
7. Leaks in the pitched roof may be caused due to:
Heavy wind is the reason for leaks in the pitched roof. Other options
are the reason for leaks in flat roof.
8. The chemical heptachlor in anti-termite proofing has concentration by
weight of:
Heptachlor in anti-termite proofing has concentration by weight of
0.50%.
9.Desiccants are chemicals that:
Dessicants are chemicals that are used to remove moisture from the air.
10. In a building, to provide ultimate comfort to occupants ________ can
be used.
HVAC is used in buildings to provide ultimate comfort to occupants. HVAC
stands for heating ventilation and air-conditioning.
11. Which IS codes gives details about elevators?
IS 14665 gives details about elevators. It specifies the number,
capacityof elevator and number of floors to be served.
12. The slope of a ramp should not be more than:
Ramps helps in easy passage for elderly and physically challenged
occupants. The slope should be 1 in 15.
13. How many types of ventilation are there?
There are three types of ventilation i.e., natural, mechanical and
hybrid or mixed-mode ventilation.
14. A fire detector cannot detect:
A fire detector cannot detect light. It can detect radiation, heat and
smoke.
16. While calculating the handling capacity of lift, the weight of a
person is taken as 65kg.
The weight of a person is taken as 68kg while calculating the handling
capacity of the lift.
17. DPM stands for:
DPM or Damp Proof Membrane is a material applied to prevent dampness.
Instead of a DPC(Damp Proof Course), DPM is used.
18. If the soil is dry, DPC for ground floor consists of the layer of:
DPC for ground floor consists of the layer of coarse sand when the soil
is dry. The thickness of the coarse sand is about 75-100mm.
19. Dampness spreads upwards from the ground only.
Dampness spreads upwards as well as downwards. So the statement is
false.
20. At roof slab level over the DPC, __________ are provided.
Tiles are provided at roof slab level over the DPC to reduce the
dampness. The treatment involves the treatment of parapet and roof slab.