We have thought of a portion of the frequently asked civil engineering inquiries alongside their answers. For the most part, in the interview, recruiter ask common site terms that are straightforward inquiries to test your essential information of civil engineering. In the event that you are showing up yourself for it, you don't have to stress excessively over meetings and concentrate on nuts and bolts. Rest of the thing, you will learn in preparing once you selected for the desired position.
Here are the18 lined up questions generally made in the structural designing interview for common site specialists and task engineers.
Name various authorities or workers on a construction site?
Footing = 50 mm
Column = 40mm
Beam = 25mm
Slab = 20mm
What is guniting?
It is a process in which mixture of cement & sand in the proportion of 1:3 pressure shooted on the concrete surface with the help of cement gun under pressure of 2 to 3 kg/cm2. It is a highly effective process for repairing concrete walls or damaged surfaces.
What is the function of sand in mortar?
The main role of sand (aggregate) in mortar or plaster is to provide core strength, but it has other benefits too. If water is mixed with binder without adding sand to the mixture, both compressive and tensile strength of the mixture would be drastically lower than in mixture with added sand. It also helps to prevent mortar shrinkage, increases density and helps in the setting.
What are various tests for checking brick quality?
We can use water absorption test, hardness test, shape & size, crushing strength test, soundness test, etc. to check the brick quality. In water absorption test, we dip the brick for 16 hours in water. If the weight of brick after dipping in water doesn’t exceed by 20%, it can be considered as first-class brick, if below 22.5% it can be considered as second-class brick, if below 25% it can be considered as a third class brick. In crushing test, it crushing strength should be minimum of 10 N/mm2 for first-class brick, 7.5 N/mm2 for second class bricks. In hardness test, we scratch the brick with nails. It should be scratch free. In soundness test, we check the metallic sound by striking two bricks with each other.
What is the void ratio?
Void ratio is the ratio of the volume of voids to the volume of solids.
What are the functions of the column in a building?
A column is a verticle member in a building whose primary function is to support the structural load and transfer it through beams. Upper columns transfer the load to the lower columns and finally to the ground through footings.
What is the cement sand & aggregate ratios for various grades of concrete mix?
M10 – 1:3:6
M15 – 1:2:4
M20 – 1:1.5:3
M25 – 1:1:2
M30 – 1:1:1
What do you mean by honeycomb in concrete?
Honeycomb, also known as air pockets, is nothing but the air voids in the concrete. It is usually formed during concrete casting.
Does Water damage concrete?
Plain concrete is not affected or damaged by water but Reinforced Concrete (RCC) can be damaged due to water. This is because the water may seep into the concrete and corrode the steel reinforcement inside.
What is the initial and final setting time of ideal cement mix?
Initial setting time for ideal cement mix is around 30 minutes for almost all kind of cement. For masonry cement, it can be 90minutes. Final setting time of ideal cement mix should be 10 hours at max. For masonry cement, it shouldn’t exceed 24hours.
What are common methods of curing the concrete?
The weight of steel in kg can be calculated by the formula (D2*L)/162; where D is the diameter of steel bar in millimeter and L is the total length of steel bar in the meter.
What do you know about “TMT”?
TMT stands for “Thermo Mechanically Treated”. Generally, we use TMT bars and sheet for construction purposes for the reason that they have high strength and high corrosion resistance compared to normal steels.
What is the difference between working stress method and limit state method?
Working stress method is an elastic design method in which structure is designed to bear the load up to an elastic limit. Whereas, limit state method is a plastic design method in which structure is designed to bear the load beyond the elastic limit.
What field tests are required for quality check of cement?
Quality of cement can be checked with color, physical properties, etc. Cement should have grey color with light greenish shade. It should feel smooth when rubbed between fingers. If the hand is inserted in a heap of cement or its bags, it should feel cool. When a pinch of cement is thrown in Water then cement should float for some time before it sinks. Also, it should be lump free.
What are the types of foundation used in construction?
There is basically two types of foundation: Shallow & Deep foundation. Again shallow foundation can be classified as spread footing, combined footing, strap or cantilever footing and finally mat or raft footing. Deep foundations can be classified as pile footing, pier footing, caissons footing and well foundation.
What are the types of cement?
There are various types of cement which are: Ordinary Portland Cement (OPC), White Portland Cement (WPC), Portland Pozzolana Cement (PPC), Low Heat Portland Cement, Coloured Portland Cement, Hydrophobic cement, Rapid Hardening Cement, Portland Slag Cement, Sulphate Portland Cement, etc.
Here are the18 lined up questions generally made in the structural designing interview for common site specialists and task engineers.
Name various authorities or workers on a construction site?
- Senior Engineer/Project manager
- Site Engineer
- Contracter
- Mistri
- Mason/labor
What is minimum cover provided for different RCC Members?
Footing = 50 mm
Column = 40mm
Beam = 25mm
Slab = 20mm
What is guniting?
It is a process in which mixture of cement & sand in the proportion of 1:3 pressure shooted on the concrete surface with the help of cement gun under pressure of 2 to 3 kg/cm2. It is a highly effective process for repairing concrete walls or damaged surfaces.
What is the function of sand in mortar?
The main role of sand (aggregate) in mortar or plaster is to provide core strength, but it has other benefits too. If water is mixed with binder without adding sand to the mixture, both compressive and tensile strength of the mixture would be drastically lower than in mixture with added sand. It also helps to prevent mortar shrinkage, increases density and helps in the setting.
What are various tests for checking brick quality?
We can use water absorption test, hardness test, shape & size, crushing strength test, soundness test, etc. to check the brick quality. In water absorption test, we dip the brick for 16 hours in water. If the weight of brick after dipping in water doesn’t exceed by 20%, it can be considered as first-class brick, if below 22.5% it can be considered as second-class brick, if below 25% it can be considered as a third class brick. In crushing test, it crushing strength should be minimum of 10 N/mm2 for first-class brick, 7.5 N/mm2 for second class bricks. In hardness test, we scratch the brick with nails. It should be scratch free. In soundness test, we check the metallic sound by striking two bricks with each other.
What is the void ratio?
Void ratio is the ratio of the volume of voids to the volume of solids.
What are the functions of the column in a building?
A column is a verticle member in a building whose primary function is to support the structural load and transfer it through beams. Upper columns transfer the load to the lower columns and finally to the ground through footings.
What is the cement sand & aggregate ratios for various grades of concrete mix?
M10 – 1:3:6
M15 – 1:2:4
M20 – 1:1.5:3
M25 – 1:1:2
M30 – 1:1:1
What do you mean by honeycomb in concrete?
Honeycomb, also known as air pockets, is nothing but the air voids in the concrete. It is usually formed during concrete casting.
Does Water damage concrete?
Plain concrete is not affected or damaged by water but Reinforced Concrete (RCC) can be damaged due to water. This is because the water may seep into the concrete and corrode the steel reinforcement inside.
What is the initial and final setting time of ideal cement mix?
Initial setting time for ideal cement mix is around 30 minutes for almost all kind of cement. For masonry cement, it can be 90minutes. Final setting time of ideal cement mix should be 10 hours at max. For masonry cement, it shouldn’t exceed 24hours.
What are common methods of curing the concrete?
- Spraying
- Wet covering of Surface
- Ponding
- Application of curing chemicals
- Steam curing
What is the formula for the weight of steel?
The weight of steel in kg can be calculated by the formula (D2*L)/162; where D is the diameter of steel bar in millimeter and L is the total length of steel bar in the meter.
What do you know about “TMT”?
TMT stands for “Thermo Mechanically Treated”. Generally, we use TMT bars and sheet for construction purposes for the reason that they have high strength and high corrosion resistance compared to normal steels.
What is the difference between working stress method and limit state method?
Working stress method is an elastic design method in which structure is designed to bear the load up to an elastic limit. Whereas, limit state method is a plastic design method in which structure is designed to bear the load beyond the elastic limit.
What field tests are required for quality check of cement?
Quality of cement can be checked with color, physical properties, etc. Cement should have grey color with light greenish shade. It should feel smooth when rubbed between fingers. If the hand is inserted in a heap of cement or its bags, it should feel cool. When a pinch of cement is thrown in Water then cement should float for some time before it sinks. Also, it should be lump free.
What are the types of foundation used in construction?
There is basically two types of foundation: Shallow & Deep foundation. Again shallow foundation can be classified as spread footing, combined footing, strap or cantilever footing and finally mat or raft footing. Deep foundations can be classified as pile footing, pier footing, caissons footing and well foundation.
What are the types of cement?
There are various types of cement which are: Ordinary Portland Cement (OPC), White Portland Cement (WPC), Portland Pozzolana Cement (PPC), Low Heat Portland Cement, Coloured Portland Cement, Hydrophobic cement, Rapid Hardening Cement, Portland Slag Cement, Sulphate Portland Cement, etc.
Describe briefly the various methods of concrete curing.
Curing is the process of maintaining the moisture and temperature conditions for freshly deployed concrete. This is done for small duration of time to allow the hardening of concrete. The methods that are involved in saving the shrinkage of the concrete includes:
(a) Spraying of water: on walls, and columns can be cured by sprinkling water.
(b) Wet covering of surface: can be cured by using the surface with wet gunny bags or straw
(c) Ponding: the horizontal surfaces including the slab and floors can be cured by stagnating the water.
(d) Steam curing: of pre-fabricated concrete units steam can be cured by passing it over the units that are under closed chambers. It allows faster curing process and results in faster recovery.
(e) Application of curing compounds: compounds having calcium chloride can be applied on curing surface. This keeps the surface wet for a very long time.
No comments:
Post a Comment