A smoking burner with a pulsating flame in auxiliary boiler, is an indication that the（）
A . fuel oil supply temperature is normal
B . burner electrode is incorrectly positioned
C . fuel／air ratio is incorrect
D . ignition current is too low
相似题目
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White smoke exhausting from a diesel engine can be caused by （）
A . low combustion temperature
B . a leaking fuel nozzle check valve
C . late fuel injection
D . plugged oil-scraper ring hole
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Failure of the burner flame in an auxiliary boiler would probably be a result of（）
A . water in the fuel oil
B . broken high tension leads
C . incorrect electrode setting
D . full fuel pressure at the nozzle
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Smoking in bed on a ship is prohibited（）.
A . at all times
B . during evening hours
C . unless another person is present
D . during drilling operatio
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The purpose of a temperature sensing device installed in the stack of a small automatically fired auxiliary steam boiler is to secure the oil burner（）
A . in the event of a flame failure
B . in the event of a stack fire
C . when the water level reach the crown sheet
D . when the feed pump discharge pressure drops to a preset minimum
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驾驶舱A.PU控制面板上主要指示仪表有（）.
A . 转速表、排气温度表、滑油压力表和振动指示器
B . 各指示灯、排气温度表
C . 与主发动机一样
D . 只有操纵电门，没有指示器
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After a normal, or safety shutdown, automatic combustion control systems for an auxiliary boiler are designed to prevent the immediate refiring of a burner in order for the （）.
A . furnace to be re-purged
B . electric charge to buildup in the igniter
C . fuel pump to restart
D . dram level to stabilize
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A dazzling white burner flame in the boiler furnace indicates （）.
A . no combustion
B . deposits in the fuel
C . excessive air in the fuel
D . cold fuel oil
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Black smoke exhausting from a diesel engine indicates（）
A . proper fuel injection
B . water in the fuel
C . incomplete combustion
D . burning of lube oil
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A diesel engine emits blue exhaust smoke as a result of（）
A . cold intake air
B . excessive compression pressure
C . excessive cylinder lubrication
D . a light load
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We advised him to give up smoking,（）a lot of exercise.
A . to do
B . and to do
C . and do
D . and doing
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After a normal, or safety shutdown, automatic combustion control systems for an auxiliary boiler are designed to prevent the immediate re-firing of a burner in order for the （）.
A . furnace to be re-purged
B . electric charge to buildup in the igniter
C . fuel pump to restart
D . drum level to stabilize
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During a training exercise a submarine indicating that a torpedo has been fired will send up smoke from a float. The smoke’s color will be（）.
A . black
B . red
C . orange
D . yellow
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A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and speed remaining below normal the probable（）
A . engine overload
B . leaky valves
C . stuck or broken piston rings
D . low air injection pressure
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If you smoke in a non-smoking section people________.
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We have a no-smoking policy so anybody who really wants to smoke has to go outside.
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In which case is smoking not allowed in a private residence？
A．If it has no ventilation systems.
B．If it has a childcare facility.
C．If it has no designated areas.
D．If it is close to public areas.
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The （anti-smoking) campaign （on campus) has made （quite an impact) （with) the students.A．a
The (anti-smoking) campaign (on campus) has made (quite an impact) (with) the students.
A．anti-smoking
B．on campus
C．quite an impact
D．with
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Now that the sign reads, “No person ______ smoke here”, please choose a seat in the smoking area over there if you _______ smoke. A．must; shall B．will; must C．shall; must D．can; should
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If you have to go through a smoke－filled area, you’d better with your head low.
A.crawl
B.retreat
C.proceed
D.drag
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Smoking is inhibited（A级）in puhlic places．
A．instructed
B．inquired
C．forbidden
D．strived
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The organization（)a national campaign against cigarette smoking in public places.
A、launched
B、opened
C、enclosed
D、sent out
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Some people view the findings with caution, noting that a cause-an&effect relationship between passive smoking and cancer remains______
A．to be shown
B．to have shown
C．to have been shown
D．being shown
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From the passage we can infer that Pu's father is portrayed as a______.
A．demonstrative and caring parent
B．reserved and reticent man
C．compassionate and sentimental spouse
D．spontaneous and dynamic minister
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听下面的录音[pu1],请选出来正确的答案A．bū
B．pū
