Refer to figure.
EASA learning objective 022.01.07.01.03 states: 'List the following units used for torque: Newton meters; inch or foot pounds.'
EASA learning objective 022.01.07.01.04 states: 'State that engine torque can be displayed as a percentage.'

Torque is a measurement of the rotational force exerted on the gearbox by the engine's turbine sections. It gives an indication of the power required to turn the propellor on a turbo-prop or rotor on a helicopter. Power = Torque x RPM.

Torque is displayed as a value on a Torquemeter. Unit can be inch pounds, foot pounds or newton-metres. In modern aircraft it's more common to indicate a percentage of maximum allowable torque.