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輪機英語章節(jié)練習(2019.09.20)

單項選擇題
If ignited, which of the listed materials would be a class "B" fire?（）
A.Magnesium
B.Paper
C.Wood
D.Diesel Oil
單項選擇題
High-speed rotation in a centrifugal purifier can produce a force （） the force of gravity.
A.many thousand times larger than
B.the same as
C.many thousand times smaller
D.none of the above
單項選擇題
Compared to a constant pitch propeller, a controllable pitch propeller（）.
A.more efficiently uses available engine power
B.operates at a lower efficiency at a fixed speed
C.produces the same torque at lower engine power
D.develops its rated power at a lower speed
單項選擇題
Before using or operating any equipment, you should first （） its manual thoroughly and understand its contents（）.
A.read/sufficient
B.consult/sufficiently
C.read/sufficiently
D.consult/sufficient
單項選擇題
An increase in load on a diesel engine results in （） of speed of the crankshaft.
A.a reduction
B.an increase
C.an outing
D.a downwards
單項選擇題
In a （） boiler the hot gases from the furnace pass through the tubes while the water is on the outside.
A.water-tube
B.fire-tube
C.exhaust gas
D.None of the above is true
單項選擇題
If a liquid sight flow indicator in a refrigeration system shows gas bubbles in motion passing inside of the glass, there is （）.
A.too much refrigerant in the system
B.oil entrained in the refrigerant
C.less than a full charge of refrigerant in the system
D.ice crystals forming in the refrigerant
單項選擇題
The main function of tie rods in the construction of large, low speed diesel engines is to（）.
A.stiffen the bedplate in way of the main bearings to increase the engines longitudinal strength
B.accept most of the tensile loading that results from the firing forces developed during operation
C.mount the engine frame securely to the hull to prevent shaft coupling misalignment
D.connect the crosshead solidly to the piston rod
單項選擇題
（）is not installed on the emergency switchboard.
A.Ammeter
B.Voltmeter
C.Wattmeter
D.Synchroscope
單項選擇題
Which of the following is true?（）
A.A company should develop an ISM and implement it
B.A company implementing an ISM properly may obtain a DOC
C.Once a company obtains its DOC, each vessel of this company will obtain a SMC
D.DOC is valid for 60 months unless “major non-conformity” is found