131) A simple turbo-jet engine is basically a gas turbine engine equipped with a propulsive nozzle and diffuser.

132) If the flow of air through the compressor is parallel to its axis, then the compressor is

133) The volumetric efficiency of the compressor is defined as the ratio of volume of free air delivery per stroke to the swept volume of the piston.

134) A centrifugal compressor is an axial flow compressor.

135) A compressor must be driven by some prime mover.