Tata Cummins Field Service Engineer Interview Questions, Process, and Tips

Possible check points for high engine oil consumption

• Check for oil leaks in the engine

• Inspect the PCV valve and system for proper functioning

• Examine the piston rings for wear or damage

• Inspect the valve seals for leaks

• Check for excessive engine blow-by

• Inspect the turbocharger for oil leaks

• Check the engine breather system for clogs or restrictions

The engine can seize due to lack of lubrication, overheating, or mechanical failure.

• Lack of lubrication can cause friction and heat, leading to seizure.

• Overheating can cause expansion and seizing of engine components.

• Mechanical failure, such as a broken piston or connecting rod, can also cause seizure.

Engine compression check is a procedure to measure the compression pressure in each cylinder of an engine.

• Start by warming up the engine to operating temperature.

• Disable the ignition system to prevent the engine from starting.

• Remove all spark plugs from the engine.

• Connect a compression gauge to the first cylinder's spark plug hole.

• Crank the engine several times using the starter motor.

• Record the compression pressure re...read more

Wet compression test measures the compression pressure of an engine cylinder with the addition of a small amount of oil.

• Wet compression test is performed to determine if low compression in a cylinder is due to worn piston rings or cylinder walls.

• In this test, a small amount of oil is added to the cylinder through the spark plug hole before performing the compression test.

• If the compression pressure increases significan...read more

The mean of a dry compression test is the average value of the compression test results obtained without the use of any lubricants or fluids.

• Dry compression test measures the compression pressure of an engine cylinder without the presence of any lubricants or fluids.

• The mean of the dry compression test is calculated by summing up all the individual compression test results and dividing it by the number of tests conduct...read more

Possible causes of poor pick up in field service engineering

• Insufficient power supply to the equipment

• Mechanical issues with the pick-up mechanism

• Dust or debris obstructing the pick-up sensor

• Faulty or outdated software/drivers

• Improper calibration of the pick-up sensor

• Interference from external sources

• Worn-out or damaged pick-up components

The check point for a vehicle that won't start is to first check the battery.

• Check the battery connections for any loose or corroded terminals.

• Test the battery voltage using a multimeter to ensure it has sufficient charge.

• Inspect the battery for any signs of damage or leakage.

• If the battery is fine, check the starter motor and ignition system for any faults.

• Verify that there is fuel in the tank and check the fuel pump