DBM Vircon BIM Coordinator Interview Questions and Answers

Bus bar schemes are different ways of connecting bus bars in power systems.

• Single bus bar scheme

• Double bus bar scheme

• Main and transfer bus bar scheme

• Ring bus bar scheme

• Breaker and a half scheme

• Mesh bus bar scheme

The equipment sequence for any line bay starts with the circuit breaker and ends with the transformer.

• The circuit breaker is the first equipment in the sequence.

• Next comes the isolator switch.

• After that, the earth switch is operated.

• Then the line disconnector is opened.

• Finally, the transformer is disconnected from the line.

• The sequence is reversed when the line bay is put back into service.

The manufacturing of cement involves chemical reactions with water, resulting in the durability of concrete.

• Cement is made by heating limestone, clay, and other materials in a kiln

• The chemical reaction between cement and water, known as hydration, results in the hardening of concrete

• The durability of concrete depends on factors such as the water-cement ratio, curing time, and quality of materials used

Calculate deflection at free end of cantilever beam with point load at end

• Use the formula: δ = (PL³)/(3EI)

• P is the point load at the end

• L is the length of the cantilever beam

• E is the modulus of elasticity of the beam material

• I is the moment of inertia of the beam's cross-sectional area

• Example: A steel cantilever beam with a length of 2 meters and a point load of 500 N at the end has a deflection of 0.104 mm

Camber is the slope provided to the road surface to drain off rainwater. It is achieved by raising the center of the road surface.

• Camber is the curvature provided to the road surface to ensure proper drainage of rainwater.

• It is achieved by raising the center of the road surface.

• The amount of camber depends on the width of the road and the expected rainfall.

• The steps for the construction of a road include surveying, cle...read more

Admixtures are chemicals added to concrete to enhance its properties. They affect the workability, strength, and durability of concrete.

• Admixtures are added to concrete to improve its quality and performance.

• They can affect the setting time, workability, strength, and durability of concrete.

• Examples of admixtures include water reducers, accelerators, retarders, air-entraining agents, and superplasticizers.

Hoop stress is the stress exerted circumferentially in a cylindrical or spherical object. Reinforcement in a dome can be provided by using steel bars or mesh.

• Hoop stress is caused by the pressure inside the object and is calculated using the formula P*r/t, where P is the pressure, r is the radius, and t is the thickness of the object.

• In a dome, reinforcement can be provided by using steel bars or mesh that are placed i...read more

Estimation and costing involves calculating the expenses of a project. No. of bricks required in 1 m3 of brickwork depends on the size of the bricks. There are various types of contracts in construction.

• Estimation and costing involves calculating the expenses of a project, including materials, labor, and other costs.

• No. of bricks required in 1 m3 of brickwork depends on the size of the bricks used. For example, if stan...read more

IS codes are Indian Standards codes used for standardization of products, processes, and services.

• IS 456:2000 - Code of practice for plain and reinforced concrete

• IS 2062:2011 - Specification of steel for general structural purposes

• IS 800:2007 - Code of practice for general construction in steel

• IS 1343:2012 - Code of practice for prestressed concrete

• IS 1200:Part 1:1992 - Method of measurement of building and civil engin...read more

Load cases in STAAD are used for qualification purposes to ensure structural safety.

• Load cases are combinations of loads that a structure may experience during its lifetime.

• Qualification load cases are used to ensure that the structure can withstand the maximum expected loads.

• Examples of load cases include dead load, live load, wind load, seismic load, and temperature load.

• Each load case is analyzed separately to deter...read more

Stiffness value refers to the resistance of an object to deformation under an applied force.

• Stiffness is a measure of how much force is required to deform an object.

• It is often used in engineering to describe the rigidity of a material or structure.

• Stiffness can be calculated using Hooke's Law, which states that the force required to deform an object is proportional to the displacement.

• For example, a steel beam is stif...read more

Level in survey refers to the height or elevation of a point relative to a reference point.

• Level is a measurement of height or elevation in surveying.

• It is used to determine the difference in elevation between two points.

• A level instrument, such as a level rod or laser level, is used to take measurements.

• Leveling is important in construction, engineering, and land surveying.

• Examples of level surveys include topographic...read more

Cement mortar strength refers to the ability of the mixture to resist compression and tension forces.

• Cement mortar strength is measured in terms of compressive strength and tensile strength.

• The compressive strength of cement mortar is determined by subjecting a cube of the mixture to a compressive load until it fails.

• The tensile strength of cement mortar is determined by subjecting a prismatic specimen of the mixture t...read more