海船船员考试
单选题Explosions do occur （） caused by the ignition of oil or vapour gaining access from compressors or defective engine starting valves.A in boiler drumsB in refrigerating plantsC in starting air pipesD in air coolers
题目
in boiler drums
in refrigerating plants
in starting air pipes
in air coolers
相似问题和答案
第1题：
Crankcase explosions in propulsion diesel engines result from ____.
A.the splashing of lubrication oil by the crankshaft
B.the dilution of crankcase oil with particles of combustion
C.broken fuel lines spraying oil on the crankcase
D.the ignition of unburned fuel and air in the crankcase
第2题：
The cetane number of a diesel fuel oil indicates its ______.
A.ignition quality
B.acid content
C.heating value
D.viscosity
第3题：
Oil fires are best extinguished by ______.
A.cutting off the supply of oxygen
B.removing the fuel
C.cooling below the ignition temperature
D.spraying with water
灭油火的最好灭火器是切断氧气供应。
第4题：
vacuum pressure
specific gravity
heat
viscosity
第5题：
Oil slick caused by spillage of oil from tanker ship is ______.
A.a drop of oil
B.the emulsion of oil at sea surface
C.the weathered oil
D.the oil floating on the surface of the sea water
第6题：
If clearance between a piston and the cylinder wall is excessive, piston slap will occur. The slap itself is caused by_____.
A.alternation of side thrust
B.a breakdown of the lube oil film on the cylinder
C.worn piston boss piston pin bearings
D.fluctuating gas pressure in tile combustion space
第7题：
The cetane number of a diesel fuel oil indicates its ______.
A.viscosity
B.acid content
C.heating value
D.ignition quality
第8题：
What did scientists learn about earthquakes at the Rocky Mountain Arsenal?
A) They occur at about 4,000 metres below ground level.
B) The injection of water into earthquake faults prevents earthquakes from occurring.
C) They are usually caused by the oil in the faults.
D) Harmful earthquakes earl be possibly prevented by causing small, harmless earthquakes.
答案：D
[试题分析] 细节题。
[详细解答] 最后一句话…scientists could inject some kind of fluid like water into faults and change one big earthquake in to a number of small，harmless earthquakes．告诉了我们答案，显然，D正确。
第9题：
How does foam extinguish an oil fire ?______.
A.By cooling the oil below the ignition temperature
B.By removing the fuel souce from the fire
C.By excluding the oxygen from the fire
D.By increasing the weight of the oil
泡沫灭火器时怎样灭油火的？通过释放泡沫隔绝空气。
第10题：
low ignition quality
a high volatility
low ignition delay
a high cetane number