5. What kind of action should be done before operating any centrifugal pump?
(A) See pump glands
(B) Check lubrication
(C) Filling liquid for case
(D) Open the connection between pump and motor
6. For merchant propulsion turbines,the _______ of about 28.5 inches Hg has widely
accepted as the design basis.
(A) length
(B) vacuum
(C) temperature
(D) height
27. In an air compressor, which process can reduce the work required for multistage
compression?
(A) Isentropic expansion
(B) Regenerative system
(C) Intercooling
(D) Reciprocating compression
32. For a gas turbine engine, which component converts the thermal energy in the hot, high
pressure gas stream into mechanical work?
(A) Turbine
(B) Compressor
(C) Combustor
(D) Rotating disc
35. For a diesel engine, which pressure is evaluated when the mean indicated pressure is
multiplied by the mechanical efficiency of the engine?
(A) Mean effective pressure
(B) Mean equilibrium pressure
(C) Maximum cycle pressure
(D) Maximum efficient pressure
40. Which component of diesel engine is inserted in a cylinder block and enclosed at the top
by a cylinder head to form the combustion space above the piston?
(A) Water jacket
(B) Cylinder liner
(C) Piston crown
(D) Scavenging ports