中华人民共和国海事局
炉石传说宇宙牧2006年第1期海船船员适任证书全国统考试题(总第39期)
科目：轮机英语 试卷代号：806
适用对象：近洋航区750-3000KW及以上船舶二/三管轮
税法二（本试卷卷面总分100分，及格分为70分，考试时间为100分钟）
答题说明：请选择一个最合适的答案，并将该答案按答题卡要求，在其相应位置上用2B铅笔涂黑。第1题至74题，每题1分，第75题至78题，每题1.5分,第79题至80题, 每题10分。
一、单项选择题：
1.The needle valve will open when the fuel pressure acting on the needle valve ______exerts a sufficient force to overcome the spring compression.
A. tape face B. tapered face C. surface D. thinner face
2.The bearings ud to support the crankshaft are generally called ______.
A. line shaft bearings B. connecting rod bearings
C. main bearings D. support bearings
3.For Vee-form engines, ______is shaped to given two slopping surface on which ______are placed at the correct relative angle to each other.
A. the bottom of the column/ the cylinder blocks
人文修养B. the top of the column/ the cylinder heads
C. the top of the column/ the cylinder blocks
D. the bottom of the column/ the cylinder heads
4.In a diel engine, fuel must be broken up into a spray of fine droplets to ______.
A. increa its quality B. obtain complete burning
C. reduce its weight chm文件手机怎么打开D. all of the above
5.An incread pressure differential between the inlet and outlet of a strainer usually indicates the strainer is ______.
A. holed B. fouled C. clean D. dry
6.The purpo of the delivery check valve ud in a diel fuel injection jerk pump is to ______.
A. assist in a quick cutoff of fuel injection
B. allow oil backflow from the injector to the helix
C. reduce fuel oil pressure between injection strokes
D. meter the quantity of fuel delivered
7.Excessive clearances in the main or crank-pin bearings will sometimes be indicated by ______before any bearing knock is heard.
A. loss of flow in the fuel system B. loss of pressure in the air system
C. loss of flow in the lubricating system D. loss of pressure in the lubricating system
8.The fuel oil is drawn from a tank in the double bottom and pumped to _____.
A. a buffer tank B. a centrifuge C. a rvice tank D. a ttling tank
9.The outlet from an expansion tank of a clod freshwater cooling system should be piped to the ______.
A. cylinder head water outlet header B. cylinder jacket inlet main
C.1993年什么命 heat exchanger inlet connection D. jacket water pump suction line
10.After the order '______' is given, the air system is shut down, the turning gear put in.
A. Finished With Engine B. Stop The Engine C. Stand-by Engine D. Slow-down Engine
11.The way to reduce ______is to build up a film or lubricant between any two surfaces that rub against each other.
A. friction B. collision C. inertia D. resistance
12.While standing by the engine, You should ______.
A. turn the engine B.给父母的一封信 check oil level C. stop fuel oil pump D. A and B
13.To start the ejection process ,the oil feed to the centrifuge is first shut off and the oil re
maining in the bowl removed by admitting ______.
A. flashing water B. operating oil C. flushing water D. aling water
14.Higher than normal jacket water temperatures occurring in all cylinders of a diel engine can result from a/an ______.
A. oil suction line restriction B. correct amount of coolant
我喜欢出发C. cavitation erosion in the water jackets D. clogged a suction strainer
15.Clo the______.
A. keyway B. shaft C.撒哈拉的故事读后感 packing D. valve
16.Which pump is the lf-priming pump?
A. turbine B. centrifugal C. Gear D. axial flow
17.A feed pump for an auxiliary boiler might lo suction if the ______.
A. boiler water level is low B. feedwater is too hot
C. boiler steam demand is low D. feedwater is too cold
18.A simple pumping system consists of a suction branch, a pump and______.
A. a priming device B. a discharge branch C. a filter D. a suction valve
19.The lube oil cooler is located after the lube oil filter in order for ______.
A. the filter to operate more efficiently
B. the lube oil cooler to be bypasd
C. positive lube oil pump suction to be assured
D. galvanic action(流电产生的作用) in the cooler to be minimized
20.A check valve is another name for______.
A. a test valve B. an inspection valve C. a stop valve D. a non-return valve
21.If an operating auxiliary boiler has a water pH reading of 7, you should ______.
A. bottom blow the boiler
B. treat the water with caustic soda(苛性钠)
C. treat the water with chemical
D. reduce the water alkalinity to recommended readings
22.In the hydraulic system, _____ is the power unit.
A. oil pump B. control valve C. hydraulic motor D. fittings
