题目内容（请给出正确答案）

[主观题]

If the flame from combustion in the cylinder of a four-stroke engine past the piston into

the space below, the accumulation of flammable mixture would be ignited, thus resulting in _____.

A.the crankcase explosion

B.lifting of the cylinder safety valve

C.a scavenge fire

D.opening of the manhole

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更多“If the flame from combustion i…”相关的问题

第1题

A steady flame in a gas range is the result of ______.A．a burning velocity equal to the co

A steady flame in a gas range is the result of ______.

A．a burning velocity equal to the combustion wave

B．fuel being supplied at the same rate as the combustion wave

C．fuel being supplied at a higher rate than that of burning velocity

D．a free flowing supply of air from the openings in the head of the burner

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第2题

Flame screens are used to ______.A.contain flammable fumesB.protect firefightiers from fla

Flame screens are used to ______.

A.contain flammable fumes

B.protect firefightiers from flames

C.prevent flames from entering tanks

D.keep flame and sparks from getting out of an engine’s exhaust system

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第3题

A flame screen ______.A.permits the passage of vapor but not of flameB.prevents the passag

A flame screen ______.

A.permits the passage of vapor but not of flame

B.prevents the passage of flammable vapor

C.prevents inert gas from leaving a tank

D.permits vapors to exit but not enter a tank

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第4题

15. The sacred flame of Olympics traveled from Greece to the host country in creative ways, such as:

A、skiing

B、under the water

C、via satellite

D、by dragon boat

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第5题

As can be seen from the passage, Carry the Flame ______.A．was founded by Mr. Cavelier, a V

As can be seen from the passage, Carry the Flame ______.

A．was founded by Mr. Cavelier, a Vietnam veteran

B．members come from all over the country

C．riders are also members of Rolling Thunder

D．hold the flame-lighting ceremony once a year

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第6题

Flame failure in an automatically fired auxiliary boiler can from a/an _________.A.incorre

Flame failure in an automatically fired auxiliary boiler can from a/an _________.

A.incorrect electrode setting

B.incorrect nozzle position

C.clogged fuel nozzle

D.broken high tension lead

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第7题

In the presence of an open flame or hot surfaces, chlorinated fluorocarbon refrigerants de

composes and from _______

A.petroleum crystals

B.phosgene gas

C.water vapor

D.carbon monoxide

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第8题

When subjected to high heat from a open flame, or an electric heating element, which of th

e listed refrigerants will break down and produce phosgene gas？

A.CO2

B.Methyl chloride

C.R-22

D.Sulphur dioxide

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第9题

If you find an extremely large refrigerant leak while using a halide torch, your flame wil

l ___.

A.change from blue to orange

B.‘flare up’ and remain lighted

C.probably go out

D.stay blue

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第10题

What are the benefits of the lighter？（多选题）

A、The long pipe keeps your hand away from the flame so you never get burned.

B、The safety catch makes it easy to operate.

C、You don’t have to worry about children playing with it.

D、The color is attractive to children.

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第11题

Finally the sun sets, in a flame which stretches from the mountain behind to the horizon o

n the sea, the last bather comes up from the beach, children straggle home, dark little figures etched against the sky; lights shine in the houses, and each household gathers for its evening meal.

A、sight

B、taste

C、smell

D、touch

E、hearing

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