Hi Civil Engineer, here I am posting the Top interview questions asked by top recruiters from Top MNCs to small construction companies.
1) Explain what is the difference
between built area and super built up area?
• Built up
area: It includes your carpet area plus area covered by walls, pillars and
ducts. It is usually 10% more from the carpet area
• Super built up area: It includes your built up area plus the area that you use as building amenities like passage to lift, stairs and lifts, gym, club, etc.
• Super built up area: It includes your built up area plus the area that you use as building amenities like passage to lift, stairs and lifts, gym, club, etc.
2) What is the Unit Weight of
concrete?
The unit weight of concrete depends on the type of aggregates and amount of voids. As per IS : 456-200 Unit weight of PCC is 24KN/m3 and RCC is 25KN/m3
The unit weight of concrete depends on the type of aggregates and amount of voids. As per IS : 456-200 Unit weight of PCC is 24KN/m3 and RCC is 25KN/m3
3) What is the unit weight of
Steel?
The unit weight
of Steel is 78.5KN/m3
4) What are the Nominal Concrete Mix proportions for different
grades:
Important: M20-1:1.5:3, M7.5- 1:4:8,
Less imp: M5- 1:5:10 , M25- 1:1:2, M30-1:1:3 (Cement:Sand:aggregate)
Less imp: M5- 1:5:10 , M25- 1:1:2, M30-1:1:3 (Cement:Sand:aggregate)
5) What is ductility?
Ductility is the Ability to deform under tensile stress.
6) How to find the weight of steel bar used in reinforcement?
Weight of Bar in kg/m = Dsquare/162.2 D- Dia of bar
in mm
7) What’s the difference between one-way slab and two-way slab?
One way slab: Ratio of Longer Span / Shorter span > 2
Two way slab: Ratio of Longer span/ shorter span <= 2
Two way slab: Ratio of Longer span/ shorter span <= 2
8) What is flat slab?
The slab which is supported on columns (Flab slab don’t have
beams)
9)
What do you mean by One storeyed, Two storeyed building?
The building which has two floors is called two storeyed
building.
10) What’s the height of each floor?
3m
11) What’s the length of rise and tread in Stair case?
Rise – 150mm to 200mm, Tread – 250mm to 300mm
12) What’s the slope of Staircase?
As per IS 456, the slope or pitch of stair should be between 25
degrees to 40 degrees.
13) What is a crank length in the slab?
The crank length in Slab is 0.42 D. Where D is Depth of Slab- Top cover – Bottom Cover.
The crank length in Slab is 0.42 D. Where D is Depth of Slab- Top cover – Bottom Cover.
14) What are the types of a slump?
True Slump: The concrete mass after the test when slumps evenly all around without disintegration is called the true slump.
Shear Slump: When one-half of the concrete mass slide down the other is called the shear slump. This type of slump is obtained in a lean concrete mix.
Collapse Slump: When the sample is collapsed due to adding excessive water, it is known as collapse slump.
Zero Slump: For very stiff or dry mixes it does not show any changes of the slump after removing the slump cone.
True Slump: The concrete mass after the test when slumps evenly all around without disintegration is called the true slump.
Shear Slump: When one-half of the concrete mass slide down the other is called the shear slump. This type of slump is obtained in a lean concrete mix.
Collapse Slump: When the sample is collapsed due to adding excessive water, it is known as collapse slump.
Zero Slump: For very stiff or dry mixes it does not show any changes of the slump after removing the slump cone.
15) What is honeycomb in concrete? How is it formed? How to eradicate
honey comb in concrete?
Learn about Honeycomb concrete
16) What is grouting?
Grout is a fluid form of concrete which is used to fill the voids.
Grout is a fluid form of concrete which is used to fill the voids.
17) What is allowable moisture content in Fine aggregate for the
concrete mix?
We won’t use the aggregate if its moisture content is more than 5%.
We won’t use the aggregate if its moisture content is more than 5%.
18) What do you mean by segregation?
Segregation is a separation of cement, sand from aggregate. This is caused due to Water cement ratio and when concrete is poured about more than 1.5m
Segregation is a separation of cement, sand from aggregate. This is caused due to Water cement ratio and when concrete is poured about more than 1.5m
19) What is Seepage?
Slow percolation of water through soil is called Seepage.
20) What is the Compressive Strength of brick?
Second class brick-70kg/cm2
First class brick-105kg/cm2
Fire brick-125kg/cm2
First class brick-105kg/cm2
Fire brick-125kg/cm2
21) How do you check the quality of cement on the site?
1. Date of Mfg:
Cement strength decreases with its age.
2. Color: Colour should be grey with light greenish shade and it should be uniform. Color gives an indication of excess lime or clay.
3. Float test: A good cement won’t float if you throw a cement in water.
4. When you put your hand in cement bag you should feel cool.
2. Color: Colour should be grey with light greenish shade and it should be uniform. Color gives an indication of excess lime or clay.
3. Float test: A good cement won’t float if you throw a cement in water.
4. When you put your hand in cement bag you should feel cool.
22) What is Initial & final setting time of concrete?
Intial Setting time : Not less than
30mins
Final setting time : Not more than 10hrs
23) What is durability?
Ability to withstand under pressure is called Durability.
Ability to withstand under pressure is called Durability.
24) What are the concrete tests?
Slump test, Compressive strength test, water permeability test, Water absorption test
Slump test, Compressive strength test, water permeability test, Water absorption test
25) What is bleeding in concrete?
Bleeding is one form of segregation, where water comes out to the surface of the concrete, being lowest specific gravity among all the ingredients of concrete.
Bleeding is one form of segregation, where water comes out to the surface of the concrete, being lowest specific gravity among all the ingredients of concrete.
26) What is the name of the machine to get compression test?
Universal testing machine (UTM)
27) What is the function of stirrups in the column?
Stirrups are provided to handle the shear force and to hold the rebars (main bars) in position.
Stirrups are provided to handle the shear force and to hold the rebars (main bars) in position.
28) 1 feet= ………?m, 1Yard = ………? Ft, 1 Meter = ………? inch, 1Sq.Yd=………? SqFt
1 feet = 0.3048m, 1Yard = 3ft, 1 Meter = 39.3701 inch, 1Sq.Yd = 9
Sqft.
No comments:
Post a Comment