Part of a manual gearbox selector mechanism that prevents the engagement of two gears at the same time.

Any gear in a transmission gearbox other than top and bottom or reverse.

A shaft between the input and output shafts, usually as part of a gearbox.

Engine where fuel is burnt inside cylinders.

One inside of an organisation.

A feature of some suspension components where friction tends to reduce oscillations.

Describes the resistance of a component that is the combination of all its internal parts. Even a battery has some resistance inside it.

Splines (teeth) inside a shaft or tube.

A hole that narrows.

The process whereby a centre ensures it operates consistently and to national standards in interpreting and assessing the key skills.