Gmmco Operation & Maintenance Engineer Interview Questions and Answers

An engine is a machine that converts fuel into mechanical energy to power vehicles or machinery.

• Engines can be classified as internal combustion engines or external combustion engines

• Internal combustion engines are commonly used in cars, motorcycles, and small aircraft

• External combustion engines, such as steam engines, use an external heat source to generate steam which powers the engine

• Engines require regular maintena...read more

Compression ratio is the ratio of the volume of the combustion chamber from its largest capacity to its smallest capacity.

• It is an important parameter in determining the performance of an internal combustion engine.

• It is calculated by dividing the volume of the combustion chamber when the piston is at the bottom of its stroke by the volume of the combustion chamber when the piston is at the top of its stroke.

• Higher com...read more

Valve lash is the gap between the rocker arm and the valve stem in an engine.

• Valve lash needs to be adjusted periodically to ensure proper engine performance.

• Too much valve lash can cause a noisy engine and reduced power output.

• Too little valve lash can cause the valves to not fully close, leading to poor fuel economy and engine damage.

• Valve lash is typically measured using feeler gauges.

• Examples of engines that requir...read more