Normet Service Engineer Interview Questions and Answers

A hydraulic circuit diagram is a schematic representation of a hydraulic system, showing the flow of fluid and the various components involved.

• A hydraulic circuit typically consists of a pump, valves, actuators, and fluid lines.

• The pump is responsible for generating hydraulic pressure by converting mechanical energy into fluid flow.

• Valves control the direction, flow rate, and pressure of the hydraulic fluid.

• Actuators, ...read more

Single acting cylinders have one port for fluid to enter and exit, while double acting cylinders have two ports.

• Single acting cylinders use fluid pressure to extend the piston rod and a spring to retract it.

• Double acting cylinders use fluid pressure to extend and retract the piston rod.

• Single acting cylinders are commonly used in applications where the load is moved in one direction only, such as in dump trucks.

• Double ...read more

Directional valve controls the direction of fluid flow while pressure reducing valve maintains a constant downstream pressure.

• Directional valve is used to control the direction of fluid flow in a hydraulic system.

• Pressure reducing valve is used to maintain a constant downstream pressure in a hydraulic system.

• Directional valve can be either a spool valve or a poppet valve.

• Pressure reducing valve can be either a direct a...read more

Pressure Relief valve releases excess pressure to prevent damage, while Pressure Reducing valve reduces pressure for downstream use.

• Pressure Relief valve opens when pressure exceeds set limit to prevent damage to equipment

• Pressure Reducing valve reduces pressure for downstream use, maintaining a constant pressure

• Pressure Relief valve is typically used in systems with no downstream pressure requirement

• Pressure Reducing ...read more

2 stroke engines have a power stroke in every revolution, while 4 stroke engines have a power stroke in every other revolution.

• 2 stroke engines have a simpler design and are lighter than 4 stroke engines

• 2 stroke engines have a higher power-to-weight ratio than 4 stroke engines

• 4 stroke engines are more fuel efficient and have a longer lifespan than 2 stroke engines

• 4 stroke engines have a separate lubrication system, whi...read more

Turbocharger is used in internal combustion engines to increase power output while centrifugal compressor is used in HVAC systems to increase air pressure.

• Turbocharger is driven by exhaust gases while centrifugal compressor is driven by an electric motor or a gas turbine.

• Turbocharger compresses air before it enters the engine while centrifugal compressor compresses air after it enters the system.

• Turbocharger is used in...read more

Turbocharger increases the air intake in diesel engine to improve performance.

• Turbocharger uses exhaust gases to spin a turbine which compresses air intake

• Compressed air has more oxygen, allowing more fuel to be burned, increasing power

• Turbocharger can increase engine efficiency and reduce emissions

• Commonly used in diesel trucks, boats, and heavy machinery

Compressor in diesel engine compresses air to increase its pressure and temperature.

• Compressor draws in air from the atmosphere and compresses it before sending it to the engine.

• The compressed air is mixed with fuel in the combustion chamber to create a high-pressure explosion that powers the engine.

• The compressor is driven by the engine's crankshaft through a belt or gear system.

• The compressor also helps to cool the e...read more

Heat exchange in hydraulic machines is used to regulate temperature and prevent overheating.

• Heat exchange helps to maintain the temperature of hydraulic fluid within a safe operating range.

• It prevents overheating of the hydraulic system, which can cause damage to the components.

• Heat exchangers can be air-cooled or liquid-cooled, depending on the application.

• Examples of hydraulic machines that use heat exchange include ...read more