Building Construction Questions (BC8)

In this post, I will share some important questions which are frequently asked in competitive examinations such as SSC, UPSC and state PSCs.

1. The supporting member immediately below the floorboards is called ...

   
   

   1. bridging joists
   2. underlayer
   3. girder
   4. screeds

   View Answer

   Answer: a
   The horizontal structural members placed along shortest span immediately below the floor topping are termed as bridging joist.
   They are used as main supporting members in Timber floors having single joist floor system.



2. Why is cement concrete floor constructed in panels?

   
   

   1. to save the material
   2. for architectural purpose
   3. to prevent the development of cracks
   4. none of the above

   View Answer

   Answer: c



3. What is the thickness of the topping laid in a single layer in a bonded CC floor finished over the ground?

   
   

   1. 20 mm
   2. 25 mm
   3. 30 mm
   4. 40 mm

   View Answer

   Answer: b
   As per IS 2571, fig 2 (2A), the thickness of the topping is 25 mm.



4. What is the proportion of cement concrete used in a base course in a monolithic finish concrete floor?

   
   

   1. 1:2:4
   2. 1:1.5:3
   3. 1:3:6
   4. 1:4:8

   View Answer

   Answer: d
   As per IS 2571, table-3, it is 1:4:8



5. If the size of the chips to be used in Terrazzo flooring is 7 to 10 mm, what is the minimum thickness of the topping?

   
   

   1. 15 mm
   2. 12 mm
   3. 9 mm
   4. 6 mm

   View Answer

   Answer: b
   As per IS 2114, Cl 5.2, the minimum thickness of the topping will be 12 mm when the size of the chips is 7 to 10 mm.



6. The combined thickness of underlayer and topping of a terrazzo floor shall not less than ...

   
   

   1. 30 mm
   2. 40 mm
   3. 50 mm
   4. 60 mm

   View Answer

   Answer: a
   As per IS 2114, Cl 5.2, it should not be less than 30 mm.



7. What is used for the grinding of terrazzo floor?

   
   

   1. diamond
   2. aluminium oxide
   3. carborundum stone
   4. none of the above

   View Answer

   Answer: c
   As per IS 2114, Cl 11.3, carborundum stone is used for grinding.



8. Which of the following is sprinkled over the surface after the final grinding of terrazzo floor?

   
   

   1. oxalic acid
   2. acetic acid
   3. hydrofluoric acid
   4. none of the above

   View Answer

   Answer: a
   As per IS 2114, Cl 11.3.8, oxalic acid is used.



9. In theatres, which of the following floors is suitable?

   
   

   1. Terrazzo floor
   2. Cement Concrete floor
   3. Cork floor
   4. Asphalt floor

   View Answer

   Answer: c



10. What is the maximum centre to centre span between bridging joists in case of single joisted timber floor for ground floor?

    
    

    1. 2.5 m
    2. 3 m
    3. 3.5 m
    4. 4 m

    View Answer

    Answer: 3
    As per IS 3670, Cl 8.1, the maximum centre to centre span between bridging joists in case of single joisted timber floor for ground floor is 3 m.
    As per IS 3670, Cl 8.1.1 (a), the maximum centre to centre span between bridging joists in case of single joisted timber floor for upper floor is 4 m.



11. In a single joisted timber floor, maximum deflection is ____ of the span due to floor loading.

    
    

    1. 1/300
    2. 1/320
    3. 1/340
    4. 1/360

    View Answer

    Answer: d
    As per IS 3670, Cl 8.1, it is 1/360 of the span.



12. Which of the following is correct?

    
    

    1. Double joisted timber floor is more rigid than the single joisted floor.
    2. Double joisted timber floor reduces the headroom.
    3. Single joisted timber floors are cheaper than double joisted timber floor.
    4. All of the above

    View Answer

    Answer: d



13. The rise in the arch of a jack arch floor is _____ of the span.

    
    

    1. 1/4 to 1/6
    2. 1/6 to 1/8
    3. 1/8 to 1/10
    4. 1/10 to 1/12

    View Answer

    Answer: b
    As per IS 2118, Cl 5.2.3, the rise is 1/6 to 1/8 of the span.



14. The maximum deflection of the joists of jack arch floor should not exceed ______ of the span.

    
    

    1. 1/360
    2. 1/400
    3. 1/480
    4. 1/520

    View Answer

    Answer: c
    As per IS 2118, Cl 5.2.2, the maximum allowable deflection is 1/480 of the span.

prev 1 2 3 4 5 6 7 8