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Civil Engineering Basic Questions?

Q.1  What is the height of building floor?Ans. The height of building floor must be 3m.

Q. 2  What is the initial setting time of cement?

Ans. The initial setting time of cement is 30 minutes.

Q. 3 What is the final setting time of the cement?

Ans. Final setting time of cement is 10 hours or 600 minutes.

Q. 4 What is the compressive strength of first class brick?

Ans. Compressive strength of first class brick is 105 N/cm2.

Q. 5 What is the compressive strength of second class brick?

Ans. Compressive strength of second class brick is 70 N/cm2. 

Q. 6 What is the compressive strength of third class brick?

Ans. Compressive strength of third class brick is 50 N/cm2.

Q.7 What is the compressive strength of Burnt brick?Ans. Compressive strength of burnt brick is 125 N/cm2.

Q. 8 What is the name of compression testing machine?

Ans. Universal Testing Machine (UTM).

Q. 9 Why we use pile foundation?

Ans . Pile foundation is adopted when the soil bearing capacity is less than 24 kN/m3.

Q. 10 What do you mean by segeration?Ans . Segregation is a separation of cement, sand from aggregate.This is caused due to water cement ratio and when the concrete is poured about more than 1.5 m height.

Q. 11 What is the mixed ratio of M5, M7. 5,M10,M15,M20,M25 grade of concrete.

Ans.

M5 =1:5:10

M7.5=1:4:8

M10=1:3:6

M15=1:2:4

M20=1:1.5:3

M25=1:1:2

Where, M stands for mixed and number means (like, 5,7.5,10,15,20,25) characteristic compressive strength of 150 mm×150mm×150mm fresh concrete cube in 28 days.

Q. 12, What is the normal height of riser in staircase?

Ans. The normal height of riser should be 15cm, 150mm or 6 inch.

Q. 13, What should be window height from plinth level?

Ans. The window heightshouldbe 1200mm. 

Q. 14, What should be minimum thickness of slab?

Ans. The minimum thickness of slab should be 125mm.

Q. 15, What should be water absorbtion of first class brick?Ans. The water absorbtion should be not more than 20% its self weight. 

Q. 16, What should be FM limit of river sand?

Ans. The FM limit should be 0.5 to 0.8 of river sand.

Q. 17, What should be FM limit of toak sand?

Ans. The FM limit should be 1.2 to 1.8 of toak sand.

Q. 18, What should be FM limit of coarse sand or shylhet sand?

Ans. The FM limit should be 2.5 of coarse sand or shylhet sand. 

Q. 19, What is the Standared size of Indian brick?

Ans. The Standared size of Indian brick is 190mm×90mm×90mm.

Q. 20, What should be weight of first class brick?

Ans. The first class brick weight should be 3.85 kg. 

Q. 21, What is DPC?

Ans. DPC stands for Damp Proof Course.

Q. 22, What should be thickness of DPC?Ans. The thickness of DPC should be 50 mm.

Q.23, What is use of DPC? 

Ans. DPC resist the mousture by capilary action.

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