18. Followed the ________ procedure after completion of the overhaul of No.5 cylinder unit of main
engine with all piston rings renewed.
(A) sea trial
(B) running in
(C) mooring trial
(D) model test
19. _____________ is a measure of how much the engine compresses the air inside the cylinder. .
(A) Compression ratio
(B) Temperature rise
(C) Pressure drop
(D) Stroke bore ratio
31. Which type of valve is installed to isolate machinery, equipment, and piping components for
system operation, maintenance and overhaul, and damage control?
(A) Constant-flow valve
(B) Relief valve
(C) Safety valve
(D) Stop valve
40. A large fraction of the heat input to an internal-combustion engine is wasted in what?
(A) exhaust gas
(B) thermally insulating material
(C) condenser
(D) constructing material