5.5. Which one is used as a Scavenge Space Protection Devices to be adopted on Main
(A) Temperature Control Valve.
(B) Electrical temperature sensing device fitted within the trunking.
(C) Scavenging air valve.
(D) Scavenging space drain valve.
6.6. If the ______ occurs due to the wears of piston rings and cylinder liner, a gradually rising
pressure in the crankcase of trunk-piston engine could appear.
(B) engine knocking
(D) loud sound
12.12. The ______________ (SFOC) is the amount of fuel consumed over a period of time divided
by the power output of the engine.
(A) static fuel oil consumption
(B) specific fuel oil consumption
(C) selected fuel oil consumption
(D) specialized fuel oil consumption
13.13. The _______ could utilize further recovered heat from exhaust gas until the exhaust
temperature reaches the limit of cold-end corrosion.
17.17. If he had properly worn the protective glasses, he _______ his eyes.
(A) could have prevented water from entering
(B) might be preventing water go in
(C) could prevent water go into
(D) could prevent water go to
18.18. The pump coverts energy (external driving source) into kinetic energy in the fluid by
giving impulses to the fluid by impellers. A diffuser or volute converts most of the kinetic energy
into pressure, i.e. these machines use the basic law (Bernoulli’s) of converting potential energy
into kinetic energy. What pumps are above description?
(A) Rotary pumps
(B) Displacement pumps
(C) Gear pumps
(D) Centrifugal pumps
23.23. For a seawater cooled condenser in a steam turbine power plant, which is the correct
statement regarding the seawater temperature and the performances of condenser？
(A) Low seawater temperature permits high vacuum of condenser.
(B) Low seawater temperature permits high steam saturated temperature in condenser.
(C) Low seawater temperature permits high steam dryness in condenser.
(D) High seawater temperature permits high moisture rate of steam in condenser.
30.30. Which component of diesel engine could sustain the reciprocating forces at each cylinder
that act on the axis of cylinder？
(C) Fuel injection pump
(D) Fuel injector
40.40. In a steam turbine engine, what is the energy required to spin the turbine backwards in
the atmosphere of exhaust steam.
(A) kinetic energy
(B) blade thermal energy
(C) pressure loss
(D) astern turbine loss