Doosan Babcock Welding Supervisor Interview Questions and Answers

Daily maintenance schedules of machineries

• Check oil levels and top up if necessary

• Inspect and clean filters

• Check for any signs of wear and tear

• Lubricate moving parts

• Check for any leaks or unusual noises

• Perform any necessary repairs or replacements

• Keep a record of maintenance performed

Construction machinery uses various types of oils depending on their functions.

• There are different types of oils used in construction machinery such as engine oil, hydraulic oil, gear oil, transmission oil, and brake oil.

• Engine oil is used to lubricate the engine and prevent wear and tear.

• Hydraulic oil is used to transfer power in hydraulic systems.

• Gear oil is used to lubricate gears and bearings in gearboxes.

• Transmiss...read more

To repair a hydraulic pump, first identify the problem and then disassemble the pump to replace or repair the faulty parts.

• Identify the problem by checking for leaks, unusual noises, or loss of pressure.

• Disassemble the pump carefully, taking note of the order of parts and any seals or gaskets.

• Inspect the parts for damage or wear, and replace any faulty components.

• Reassemble the pump, making sure all parts are properly ...read more

Engine failure can be caused by various factors such as overheating, lack of maintenance, wear and tear, and manufacturing defects.

• Overheating due to lack of coolant or oil

• Lack of maintenance such as not changing oil or air filters

• Wear and tear of engine components such as pistons, bearings, and valves

• Manufacturing defects such as faulty parts or poor assembly

• Fuel contamination or incorrect fuel usage

• Improper installat...read more

The unit weight of steel refers to the weight of a specific volume of steel.

• The unit weight of steel is typically measured in pounds per cubic foot or kilograms per cubic meter.

• The specific unit weight of steel can vary depending on the type and grade of steel.

• For example, the unit weight of mild steel is approximately 490 pounds per cubic foot or 7850 kilograms per cubic meter.

• On the other hand, the unit weight of sta...read more

The weight of 1m 16 mm steel depends on the density of steel.

• The weight of steel can be calculated using the formula: weight = volume x density

• The density of steel is approximately 7.85 grams per cubic centimeter

• To calculate the weight of 1m 16 mm steel, we need to calculate its volume first

• The volume of a cylinder (steel rod) can be calculated using the formula: volume = π x radius^2 x height

• In this case, the radius w...read more

The percentage of steel in a pile varies depending on the type and design of the pile.

• The percentage of steel in a pile can range from 0% to over 90%.

• The type of pile (e.g. steel, concrete, timber) and its design (e.g. diameter, length, wall thickness) determine the percentage of steel.

• Steel piles typically have a higher percentage of steel than other types of piles.

• The percentage of steel in a pile can also affect its

Pile built-up above cut off level as per IS code

• IS code specifies the maximum allowable pile length above cut off level

• Pile length above cut off level should not exceed 3 times the pile diameter

• Built-up pile above cut off level can cause structural instability and failure

Vertical tolerance for piles as per IS code

• As per IS 2911-1:2010, the vertical tolerance for piles is +/- 25mm

• This tolerance is applicable for both driven and cast-in-situ piles

• The tolerance is measured at the top of the pile and at intervals of 3m along the length

• If the deviation exceeds the tolerance limit, the pile may need to be rejected or remedial measures taken

Pile concrete consumption tolerance depends on various factors.

• Pile diameter and length

• Concrete mix design

• Placement method

• Quality control measures

• Environmental conditions

• Tolerance typically ranges from 5-10% of estimated consumption

• Regular monitoring and adjustment of concrete consumption is necessary

Unit weight of steel is 7850 kg/m³

• The unit weight of steel is the weight of a specific volume of steel

• It is measured in kilograms per cubic meter (kg/m³)

• The unit weight of steel is 7850 kg/m³

• This value may vary slightly depending on the composition and manufacturing process of the steel