ITI Diesel Mechanic Interview Questions and Answers

2 stroke and 4 stroke engines differ in their operation and design.

• 2 stroke engines complete a power cycle in 2 strokes of the piston, while 4 stroke engines complete it in 4 strokes.

• In a 2 stroke engine, the intake and exhaust occur simultaneously, while in a 4 stroke engine, they occur separately.

• 2 stroke engines have a simpler design with fewer moving parts, while 4 stroke engines are more complex.

• 2 stroke engines are generally lighter and have higher power-to-weight ratio...read more

A diesel mechanic is a professional who specializes in the maintenance and repair of diesel engines.

• Diesel mechanics diagnose and repair problems with diesel engines.

• They perform routine maintenance on diesel engines to ensure they are running efficiently.

• They use a variety of tools and equipment to repair and replace parts of diesel engines.

• Diesel mechanics may work on a variety of vehicles and equipment, including trucks, buses, boats, and generators.

• They must have a strong...read more

The firing order of a diesel engine depends on the number of cylinders and their arrangement.

• The firing order is the sequence in which the cylinders fire.

• It is important for proper engine performance and timing.

• For example, a 4-cylinder engine may have a firing order of 1-3-4-2.

• A V8 engine may have a firing order of 1-8-4-3-6-5-7-2.

To correct an engine overheating issue, check coolant levels, inspect the radiator for blockages, ensure the thermostat is functioning properly, and check for any leaks in the cooling system.

• Check coolant levels and top up if necessary

• Inspect the radiator for any blockages or debris

• Ensure the thermostat is opening and closing properly

• Check for any leaks in the cooling system, including hoses and water pump

• Consider flushing the cooling system if necessary

The firing order of a 6-cylinder engine determines the sequence in which each cylinder fires.

• The firing order is specific to each engine model and can be found in the manufacturer's documentation.

• It is important to follow the correct firing order to ensure proper engine performance and avoid damage.

• The firing order is usually indicated by a numerical sequence, such as 1-5-3-6-2-4.

• Each cylinder fires at a specific point in the engine's rotation, determined by the crankshaft po...read more

Engine stroke refers to the movement of the piston within the cylinder during the combustion process.

• Engine stroke is the distance the piston travels from top dead center (TDC) to bottom dead center (BDC) or vice versa.

• There are four strokes in a four-stroke engine: intake, compression, power, and exhaust.

• During the intake stroke, the piston moves downward, drawing air-fuel mixture into the cylinder.

• In the compression stroke, the piston moves upward, compressing the air-fuel ...read more

The NOx sensor measures the level of nitrogen oxide emissions in a diesel engine.

• The NOx sensor is an important component in diesel engines to monitor and control nitrogen oxide emissions.

• It helps in ensuring compliance with emission standards and optimizing engine performance.

• When the NOx sensor is open, it means that it is functioning properly and allowing the necessary data to be collected.

• This data is used by the engine control unit to adjust fuel injection and other para...read more