5. Each of plates which with an elastomer seal fitted around its periphery, is contained within
a frame with clamping plates at each end. What equipment is above description?
(A) Plate type heat exchanger
(B) Fin type heat exchanger
(C) Shell-and tube type heat exchanger
(D) Venting heat exchanger
11. The ____________ for either ahead and astern direction are situated at the shaft driving
end near by the turning gear of main propulsion diesel engine.
(A) thrust pads
(B) main bearings
(C) crosshead head guide shoes
(D) intermediate shaft bearings
12. For years huge ship propulsion had astandard configulation:
____________________________________________ .
(A) a stern thruster in the forward of the ship to assist
(B) a bow thruster in the aft of the ship to assist
(C) a propeller in the rear with a rudder behind it to steer
(D) a rudder in the rear with a propeller behind it to steer
21. Carbon deposits on turbo-charger nozzle ring or rotor blades can results in __________ .
(A) low exhaust temperature outlet of the turbo-charger
(B) increased revolutions of the turbo-charger
(C) stopping of the turbo-charger
(D) reduced revolutions of the turbo-charger
24. Which possible reason will not make centrifugal pumps to failure to deliver water?
(A) The motor may be sufficient speed
(B) Discharge head is too high
(C) Air leak in the suction line, or broken or plugged up impeller
(D) Direction of rotation of the impeller is wrong
31. The volumes above the piston at the extremities of its travel are the clearance volume at top dead center position, and the cylinder volume at bottom dead center position. The ratio of cylinder volume to clearance volume is the nominal compression ratio. When the clearance volume and cylinder volume are 2m3 and 8m3 respectively, the compression ratio is what？ (A) 0.25 (B) 16 (C) 4 (D) 10
32. Which device is used in a diesel engine to inject a metered quantity of lubricating oil into
the cylinder as the piston ring pack passes the injection points？
(A) Lubricator
(B) Camshaft
(C) Crosshead
(D) Piston rod
34. The stroke-to-bore ratio of a low speed engine is 3：1. When the stroke is 900 mm, the
diameter of bore is what？
(A) 2,700 mm
(B) 300 mm
(C) 3,600 mm
(D) 225 mm
寫作批改
VIP與詳解卡管理
