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Which of the following statements concerning fire-tube boilers is correct?（）
A . Combustion gases flow through the tubes
B . Flames impinge on the tubes
C . Combustion occurs in the tubes
D . Water flows through the tube
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An exhaust gas bypass is installed on a waste heat boiler in order to （）.
A . bypass exhaust gas at high loads to prevent excessive back pressure
B . bypass a portion of the exhaust gas at peak loads for better efficiency
C . recycle exhaust gas to the turbocharger
D . minimize moisture condensation in the boiler gas passages at low load
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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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What is NOT a function of the steam drum of a marine water-tube boiler（）.
A . Receives saturated steam from the generating tubes
B . Serves as a reservoir of boiler feed water
C . Holds internal fittings for separation of moisture from steam
D . Collects steam exhausted from the turbine
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When a boiler is operating, the water level in the gauge glass reads （） when the boiler is shut down.
A . lower than
B . higher than
C . as much as
D . the same a
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When there is a flame failure in an automatically fired auxiliary boiler, the （）.
A . air supply is shut off
B . fuel supply is shut off
C . water supply is shut off
D . safety valve lift
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One of the main purposes of refractories in a boiler furnace is to（）
A . help preheat the air for the furnaces
B . help preheat the feedwater
C . protect economizer from excessive heat
D . prevent excessive furnace heat losse
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The steam boiler is part of a closed loop steam, whereby, after the energy of the steam is used up and it becomes water again, （） is collected and returned back to the boiler for heating up again to steam.
A . the former
B . the first
C . the latter
D . the last
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The maximum pressure developed by a waste heat boiler is determined by the main engine exhaust （）.
A . gas composition
B . gas temperature
C . pressure
D . timing
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Auxiliary boilers are divided into several classifications, one of which is （）.
A . water-tube supercritical circulation
B . water-tube forced circulation
C . fire-tube controlled circulation
D . fire-tube express circulatio
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A （） boiler is an auxiliary boiler sometimes included in a steamships installation for supplying steam to auxiliaries in port.
A . monkey
B . donkey
C . waste heat
D . mai
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The donkey boiler may be given a bottom blow （）
A . to raise water level
B . only while making steam
C . to remove scum
D . when fire are secured
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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
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A SECONDARY function of a waste heat boiler is to （）.
A . reduce engine exhaust noise
B . reduce engine back pressure
C . increase engine cycle efficiency
D . increase turbocharger efficiency
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Which one is not the normal operation for boiler shutdown?（）
A . Carry out soot blowing if permissible
B . Change fuel supply to diesel oil
C . Close steam stop valves on boiler when pressure is reduced
D . Drain boiler empty when it has cooled dow
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Which action should be taken when an auxiliary boiler in is operation?（）
A . Clean all electrical connections
B . Lift the relief valves by hand
C . Inspect and clean all solenoid valves
D . Inspect for oil and water leak
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Which of the lists forms of heat transfer, if any, is illustrated by the flow of combustion gases through a boiler?（）
A . Natural convection only
B . Forced convection only
C . Both natural convection and forced convection
D . None
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（） should be tested and adjusted when the boiler survey is carried out.
A . The boiler oil tank
B . The steam pipe
C . The fire side
D . The safety valve
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Auxiliary boilers are divided into several classifications, one of which is（）
A . fire-tube controlled circulation
B . fire-tube supercritical circulation
C . water-tube natural circulation
D . water-tube express circulatio
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For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
A . the temperature and flow quantity of the exhaust gas from M/E
B . the quantity of steam demanded
C . the rotary speed and the cooling water temperature of main engine
D . efficiency of M/ turbocharger
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As for an oil-fired boiler if at a normal steaming condition and water goes out of sight in gauge glasses the action you should take is: （） (1) secure oil to fires (2) increase feed pump pressure
A . （1）
B . （1）and（2）
C . （2）
D . neither（1）nor（2）
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The emblem of the Democratic Party is donkey, and that of the Republican Party is elephant, Thomas Jefferson is considered the first Democratic President, and first Republican President is Abraham Lincoln.
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As for an oil-fired boiler if at a normal steaming condition and water goes out of sight in gauge glasses the action you should take is: (1) secure oil to fires; (2) increase feed pump pressure.
A.(1)
B.(1) and (2)
C.(2)
D.neither (1) nor (2)
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A farmer had a donkey. One day it fell into a deep...
A farmer had a donkey. One day it fell into a deep hole. The poor animal cried ____36____ forhours as the farmer tried to figure out what to ____37____ . Finally, he decided the ____38____ was too old,so it just wasn’t worth it to try to ____39____ it, and the hole needed to be ____40____ up anyway. Heinvited all his neighbors to come over and ____41____ him. They each ____42____ a shovel（铲子）andbegan to cover the ____43____ with dirt（泥土）. Realizing what was ____44____ , the donkey at first criedmiserably. But as more dirt fell into the hole, it quieted down ____45____ . The farmer looked down intothe hole, and was ____46____ by what he saw. When the dirt hit its ____47____ , the donkey shook it off andtook a step up on the new layer（一层）of dirt. As the farmer’s neighbors ____48____ to put dirt ontop of the animal, it would shake it off and ____49____ a step up. Pretty soon, the donkey stepped upover the ____50____ of the hole and ran away, to the shock and astonishment of ____51____ .
Life is going to shovel dirt ____52____ you, all kinds of dirt. The trick to get out of the hole is tostop ____53____ , and not to let the dirt ____54____ you, but to shake it off and take a step up. Each one ofour troubles in life is a stepping stone. We can ____55____ difficulties just by not stopping, never giving up!
36___________
A.angrily
B.loudly
C.hopefully
D.slowly
37A.see
B.say
C.do
D.take
38A.farm
B.neighbor
C.hole
D.animal
39A.save
B.punish
C.feed
D.sell
40A.cleaned
B.shut
C.climbed
D.covered
41A.visit
B.replace
C.help
D.pay
42A.made
B.took
C.bought
D.broke
43A.farmhouse
B.ground
C.neighbor
D.hole
44A.rising
B.existing
C.happening
D.appearing
45A.completely
B.unwillingly
C.fortunately
D.comfortably
46A.surprised
B.worried
C.moved
D.disappointed
47A.eyes
B.tail
C.back
D.legs
48A.wanted
B.learned
C.decided
D.continued
49A.follow
B.move
C.watch
D.change
50A.bottom
B.edge
C.center
D.ceiling
51A.everyone
B.someone
C.no one
D.others
52A.behind
B.under
C.around
D.on
53A.climbing
B.working
C.crying
D.sleeping
54A.cover
B.pollute
C.cure
D.protect
55A.cause
B.overcome
C.avoid
D.admit
