B. G. Shirke Construction Technology Senior Engineer Mechanical Interview Questions and Answers

Q1. Soil compactor drum thickness.
Ans. 
Soil compactor drum thickness is an important factor for compaction efficiency and durability.
• The drum thickness of a soil compactor is typically between 0.5 to 1 inch.

• Thicker drums are more durable and can withstand heavier loads.

• The material of the drum also affects its thickness and durability, with steel drums being thicker than plastic ones.

• Regular maintenance and inspection of the drum thickness is important to e
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Q2. Preventive maintenance of excavator.
Ans. 
Preventive maintenance of excavator involves regular inspections, lubrication, and replacement of worn parts to ensure optimal performance and longevity.
• Regularly inspecting the excavator for signs of wear and tear

• Lubricating moving parts to prevent friction and reduce wear

• Replacing worn out parts such as filters, belts, and hoses

• Checking fluid levels and topping up as needed

• Cleaning the excavator to prevent buildup of...read more
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Q1. Shuttering area,RMC pour card etc
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Q1. Technical questions regarding our branch and field work
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Q1. Regarding experience and salary discussion
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Q1. Building structure
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Q1. 1) different between diafraam wall and retaining wall
Ans. 
Diaphragm walls are used to create a barrier while retaining walls are used to hold back soil.
• Diaphragm walls are underground walls that are used to create a barrier to prevent water from entering a construction site.

• Retaining walls are used to hold back soil and prevent it from sliding or eroding.

• Diaphragm walls are typically made of reinforced concrete and are used in deep excavations.

• Retaining walls can be made of v...read more
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Q2. Which type of material used for shuttering
Ans. 
Plywood, steel, aluminum, and plastic are commonly used materials for shuttering.
• Plywood is the most commonly used material for shuttering due to its durability and affordability.

• Steel is used for heavy-duty construction projects as it can withstand high pressure and weight.

• Aluminum is lightweight and easy to handle, making it ideal for small-scale projects.

• Plastic is a cost-effective option for simple construction pro...read more
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Q3. Calculate the bbs of 4 by 3m footing, d = 300mm , dia of steel = 12mm
Ans. 
Calculate the bbs of a 4x3m footing with d=300mm and 12mm dia steel.
• Calculate the total length of steel required

• Determine the spacing between the bars

• Prepare a detailed bar bending schedule
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Q4. Hot to calculate the quantity of concrete for trapezoidal footing
Ans. 
To calculate the quantity of concrete for trapezoidal footing, we need to use the formula for volume of a trapezoidal prism.
• Measure the length, width, and height of the trapezoidal footing

• Calculate the area of the trapezoidal base using the formula (a+b)/2 * h

• Calculate the volume of the trapezoidal prism using the formula area of base * height

• Multiply the volume by the number of trapezoidal footings needed

• Add an additi
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Estimation of a small building.

Q1. Ratio of block work motor and plastrimg motor.
Ans. 
The ratio of block work motor to plastering motor is typically 1:3.
• The ratio of block work motor to plastering motor is usually 1:3.

• This means for every 1 part of block work motor, 3 parts of plastering motor are used.

• The ratio may vary depending on the specific project requirements.
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Q2. Per day productivity of a labour
Ans. 
The productivity of a laborer can be calculated by the amount of work completed in a day.
• Productivity is measured by the amount of work completed in a specific time frame, in this case, per day.

• Factors affecting productivity include skill level, motivation, tools/equipment available, and working conditions.

• Example: A construction worker completing 10 tasks in a day is more productive than one completing only 5 tasks.
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Q3. Amount of binding wire to be used per tone of reinforcement
Ans. 
Binding wire is typically used at a rate of 8-10 kg per ton of reinforcement.
• Typically, 8-10 kg of binding wire is used per ton of reinforcement to secure the bars in place.

• The amount of binding wire needed may vary based on the complexity of the reinforcement design and the spacing between bars.

• Using too little binding wire can result in inadequate reinforcement stability, while using too much can be wasteful and incr
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Q4. Density of materials
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Density of materials is a measure of how much mass is contained in a given volume.
• Density is typically measured in units such as grams per cubic centimeter (g/cm^3) or kilograms per liter (kg/L).

• Materials with higher density have more mass packed into a given volume.

• Common examples of materials with high density include metals like lead and gold.

• Materials with low density include gases like helium and liquids like oil.
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Q1. Salary discussed
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About any road ways and types of bridges and classification of is codes for building construction

About any road ways and classification of turnouts.

Q1. Bar Bending Schedule
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Q2. Find out shuttering Area
Ans. 
Shuttering area can be calculated by finding the total surface area of the formwork used for concrete construction.
• Calculate the surface area of each individual formwork used for the concrete structure

• Add up the surface areas of all formworks to get the total shuttering area

• Consider any openings or gaps in the formwork when calculating the area
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Q3. Semi circle area formula
Ans. 
The formula for the area of a semi-circle is (1/2) * pi * r^2, where r is the radius of the semi-circle.
• The formula for the area of a semi-circle is (1/2) * pi * r^2

• The radius (r) is half the diameter of the circle

• Example: If the radius of a semi-circle is 5 cm, the area would be (1/2) * 3.14 * 5^2 = 39.25 cm^2
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Q1. Why u want to join this company ?
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Q2. Why u want to quit Your present company
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Q3. About my Salary
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