10+ Megha Engineering & Infrastructures Engineer Interview Questions and Answers

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.

• Transmission oil is used to lubricate the transmission system.

• Brake...read more

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

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 installation or repairs

• Environmental factors such as water or debri...read more

Common welding processes include MIG, TIG, Stick, and Flux-Cored welding.

• MIG (Metal Inert Gas) welding uses a wire electrode and shielding gas to join metal.

• TIG (Tungsten Inert Gas) welding uses a tungsten electrode and filler metal to join metal.

• Stick welding uses a consumable electrode coated in flux to join metal.

• Flux-Cored welding uses a wire electrode with a flux core to join metal.

• Other common welding processes include plasma arc welding and oxy-fuel welding.

• The choice ...read more

Tests conducted on welding joints

• Visual inspection

• Dye penetrant testing

• Radiographic testing

• Ultrasonic testing

• Magnetic particle testing

• Tensile testing

• Bend testing

Defected welding joints can be rectified through a process of cutting, grinding, and rewelding.

• Identify the type and extent of the defect

• Cut out the defected portion of the joint

• Grind the edges of the remaining joint to prepare for rewelding

• Reweld the joint using appropriate welding techniques and materials

• Perform non-destructive testing to ensure the quality of the repaired joint

Submerged arc welding is a process where an arc is maintained between a consumable electrode and the workpiece under a blanket of granular flux.

• The process is used for welding thick sections of steel.

• The granular flux shields the weld from atmospheric contamination.

• The consumable electrode is continuously fed into the weld pool.

• The process is commonly used in shipbuilding, pipeline construction, and pressure vessel fabrication.

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 aligned and tightened.

• Test the pump to ensure it is functi...read more

Hydrotesting is a process of testing steel pipelines by filling them with water to check for leaks or weaknesses.

• Pipeline is filled with water and pressurized to a specified level

• Pressure is held for a specified duration to check for leaks

• Test pressure is usually higher than normal operating pressure

• After testing, water is drained and pipeline is dried to prevent corrosion

Scheduled maintenance of machineries is crucial for ensuring optimal performance and longevity.

• Create a maintenance schedule based on manufacturer recommendations

• Regularly inspect and clean machineries to prevent breakdowns

• Replace worn out parts before they cause major issues

• Keep detailed records of maintenance activities for future reference