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[主观题]

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 loads

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第1题

An indication of an overloaded main propulsion diesel engine is().A.white smoke in the

An indication of an overloaded main propulsion diesel engine is().

A.white smoke in the exhaust

B.high exhaust gas pyrometer readings

C.sparks in the exhaust

D.blue smoke in the exhaust

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第2题

After passing through the turbine the exhaust gas is conducted out into the _____.

A.intercooler

B.compressor

C.cylinder

D.open air

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第3题

Diesel engine exhaust noise can be reduced in an exhaust muffler by ___.

A.changing the direction of exhaust gas flow

B.increasing the exhaust gas velocity

C.changing the exhaust gas weight

D.increasing the exhaust gas static pressure

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第4题

The boiler is fired _____ the demand for steam exceeds that available from exhaust gas hea
ting.

A.whenever

B.however

C.wherever

D.whether

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第5题

The heat loss of exhaust gas is the loss caused by the sensible heat of the exhaust gas and the flying ash.()
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第6题

exhaust gas turbochargers 意思是废气涡轮增压器。()

exhaust gas turbochargers 意思是废气涡轮增压器。()

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第7题

A dry-type spark arrestor removes sparks from a diesel engine exhaust by ____.A.increasing

A dry-type spark arrestor removes sparks from a diesel engine exhaust by ____.

A.increasing the linear velocity of the exhaust gases

B.changing directions of exhaust gas flow

C.decreasing the temperature of the exhaust gases

D.accelerating the exhaust gas through a reduced size orifice

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第8题

涡轮增压是什么意思

涡轮增压什么意思

exhaust gas turbochargers 意思是废气涡轮增压器。()

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第9题

_____ the oxygen content in the exhaust gas, _____ the combustion is.A.The lower / the wor

_____ the oxygen content in the exhaust gas, _____ the combustion is.

A.The lower / the worse

B.The higher / the better

C.The lower / the better

D.The highest / the worst

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第10题

The exhaust boilers are used to recover some of _____ carried in the exhaust gas from the
main engine.

A.water

B.oil

C.heat

D.steam

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