1. Floor under the flooring is called:
a) Plinth
b) Sunken floor
c) Sub floor
d) Hind floor
Explanation: Flooring refers to the floor finish or covering like tiles, mosaic, etc. The level below these is called sub floor.
2. A ________ floor makes noise when an intruder walks on it.
a) Glass
b) Chirping
c) Sound
d) Nightingale
Explanation: These floors make a chirping sound when the tread on. The sound is produced by the rubbing of nails against the boards of flooring.
3. A floor consists of _________ parts.
a) 2
b) 3
c) 4
d) 5
Explanation: A floor consists of 2 parts. A sub floor, which is laid below flooring and supports the flooring as well as super imposed loads. The floor covering is the second part, which gives a smooth, clean, impervious and durable surface.
4. _________ floor is used for spans of more than 7.5m
a) Framed timber
b) Stone
c) Glass
d) Double joist timber
Explanation: In a framed timber floor, girders are placed between walls and binders are put on them. It can be used for larger spans.
5. Which of the below is a problem with floors?
a) Cracks
b) Stains
c) Vibration
d) Projections
Explanation: Vibration can occur when heavy footsteps and low bass frequencies pass through the floor. Wooden floor is more prone to vibrations. A floating floor or concrete floor can be used to solve the problem.
6. Which of the below utility cannot be provided underneath a floor?
a) Plumbing
b) Sound proofing
c) Air-conditioning
d) Gas lines
Explanation: Gas lines are generally drawn through walls and not floors. All other utilities like plumbing, electrical wires, thermal and sound proofing, fire protection, sewage can be carried underneath a floor.
7. In suspended concrete floors, _________ beams are used.
a) T shaped
b) Inverted L shaped
c) Inverted T shaped
d) I shaped
Explanation: A suspended concrete floor is typically built using block and beam. Inverted T shaped beams are used. Concrete blocks (Pre-cast) are laid in between these beams.
8. The upper floors are floating floors.
a) true
b) false
Explanation: Floating floors is the one that is supported by the ground below. Suspended floor is the one supported by walls at the edges. Ground floor can be floating or suspended, while upper floor is always suspended floor.
9. Horizontal structural members placed at right angles to bridging joists are:
a) Binders
b) Girders
c) Screed
d) Topping
Explanation: Binders are provided to take the load of bridging joist and of floor toppings. Girders are placed to support binders. Screed is narrow strips of wood or bands of plaster laid on floor to act as guides to get an even surface for toppings. Top most lair of a floor is called toppings.
10. Distribution of loads on the wall is not uniform in single joist timber floor.
a) true
b) false
Explanation: In single joist timber floor, joists are spaced closely – 30cm centre to centre. It is because of this the distribution of loads on the wall is uniform.