34.The timing for each starting valve must be set so that it opens when the piston is .
(A)just past the top-dead-center(TDC) (B)just past the bottom-dead-center(BDC) (C)on the way upward (D)just before the bottom-dead-center(BDC)
38.For a ship with direct-connected low-speed propulsive engine, which is usually the dominant
source of torque variation for the shafting system? (A)Engine power variation (B)Axial displacement of thrust bearing (C)Torsional vibration of propulsive shaft (D)Longitudinal vibration of engine
12.Which equipment is usually required to remove air and noncondensable vapors that leak into
the sub-atmospheric parts of the steam power plant? (A)Gland sealing (B)Drains (C)Air ejector (D)Labyrinths
39.What device is generally designed to avoid the exposure of fire to the air and to put out the
fire? (A)fire extinguisher (B)fire alarm (C)fire detector (D)fire exposurer
22.What is the main function of labyrinth packing in a steam turbine engine?
(A)To improve the dynamic balance (B)To increase the critical speed (C)To reduce the vibration (D) To minimize the leakage of working fluid
8. The IMO had come up with a ______________ on newly adoption of ECA to deal with the global
air pollution issues.
(A) less efficient
(B) more or less restriction
(C) further restriction
(D) more sufficient
38. Which technical term is referred to as the zero-potential reference of an electric/electronic
system?
(A) Penetration
(B) Filtering
(C) Shielding
(D) Ground