网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
The（auto）ignition temperature is that temperature at which ______．
A.No spark or flame is required to ignite gas or vapor
B.A fuel begins to give off explosive vapors
C.A fuel if ignited will continue to burn
D.A 1% mixture of the fuel with air will explode
参考答案
更多 “ The（auto）ignition temperature is that temperature at which ______．A.No spark or flame is required to ignite gas or vaporB.A fuel begins to give off explosive vaporsC.A fuel if ignited will continue to burnD.A 1% mixture of the fuel with air will explode ” 相关考题
考题
The lowest temperature at which the vapor formed from a liquid ignites and continues to burn steadily in the presence of an ignition source is called the( ).
A.flash pointB.fire pointC.upper explosive limitD.lower explosive hmlt
考题
Which command displays the current temperature of a Junos device's components?()
A. show chassis temperature-thresholdsB. show chassis environmentC. show chassis hardwareD. show chassis alarms
考题
Which statement is TRUE concerning the flash point of a substance ________．A.It is lower than the ignition temperatureB.It is the temperature at which a substance will spontaneously igniteC.It is the temperature at which a substance，when ignited，will continue to burnD.It is the temperature at which the released vapors will fall within the explosive range
考题
The lowest temperature required to cause self-sustained combustion of a substance independent of any outside source of ignition is called ______．A.Explosive rangeB.Flash pointC.Ignition temperatureD.Combustion temperature
考题
The minimum temperature required to ignite gas or vapor without a spark or flame being present is called ______．A.Flash pointB.Fire pointC.Autoignition temperatureD.Lower explosive limit
考题
As an extinguishing agent, foam ______.A.conducts electricityB.should be directed at the base of the fireC.is most efffective on buring gases which are flowingD.extinguishes by cooling oil fires below ignition temperature
考题
单选题The (auto)ignition temperature is that temperature atwhich（）.A
no spark or flame is required to ignite gas or vaporB
a fuel begins to give off explosive vaporsC
a fuel if ignited will continue to burnD
a 1% mixture of the fuel with air will explode
考题
单选题Water evaporates or steam condenses at the saturation temperature, which depends upon the pressure, the higher the pressure （） the saturation temperature.A
the moreB
the higherC
the lowerD
the highest
考题
单选题The dew point temperature is（）.A
always higher than the air temperatureB
always lower than the air temperatureC
equal to the difference between the wet and dry bulb temperaturesD
the temperature at which the air is saturated with water vapor
考题
单选题A smoking burner with a pulsating flame in auxiliary boiler, is an indication that the（）A
fuel oil supply temperature is normalB
burner electrode is incorrectly positionedC
fuel／air ratio is incorrectD
ignition current is too low
考题
单选题CFC refrigerants exposed to high temperature or direct flame, will decompose and may produce（）A
methyl chlorideB
ammoniaC
hydrofluoric acidD
ozone
考题
单选题The temperature at which water vapor in the atmosphere begins to condense is called the （）.A
dew point temperatureB
condensation temperatureC
psychometric temperatureD
absolute humidity temperature
考题
单选题Which of the statements listed concerning heat transfer is correct?（）A
Heat is always transferred at a constant rateB
Heat transfer rate increases as temperature difference increasesC
The rate of heat transfer is not affected by temperature differenceD
The high temperature region is known as a heat sink
考题
单选题As an extinguishing agent，foam（）.A
conducts electricityB
should be directed at the base of the fireC
is most effective on burning gases which are flowingD
extinguishes by cooling oil fires below ignition temperature
考题
单选题The lowest temperature at which the vapor formed from a liquid ignites and continues to burn steadily in the presence of an ignition source is called the （）A
flash pointB
fire pointC
upper explosive limitD
lower explosive limit
考题
单选题The lowest temperature required to cause self-sustained combustion of a substance independent of any outside source of ignition is called （）.A
explosive rangeB
flash pointC
ignition temperatureD
combustion temperature
考题
单选题The lowest temperature at which fuel combustion becomes self-sustaining in the presence of a source of ignition, is defined as the （）A
auto-ignition pointB
flash pointC
burning temperatureD
fire point
考题
单选题Which of the following statements is correct concerning the “flash point ” of a liquid?（）A
It is lower than the ignition temperatureB
It is the temperature at which a substance will spontaneously igniteC
It is the temperature at which a substance, when ignited, will continue to bumD
It is the temperature at which the released vapors will fall within the explosive range
考题
单选题Diesel fuel vapors （）.A
can not be ignited by a spark unless the vapor is in a confined spaceB
are nontoxic in all concentrationsC
can not be ignited by a spark unless they are at their auto-ignition temperatureD
are heavier than air
考题
单选题One result of operating a diesel engine at light load with excessively low cooling water temperature is a/an （）A
decrease in ignition lagB
increase in fuel economyC
reduction in lube oil viscosityD
increase in cylinder misfiring
考题
单选题When bilge water is heated in a holding tank, which one of the following statements is not accurate?（）A
The high temperature facilitates primary gravity separationB
Most of the oil and organic solvents are raised to the top layerC
The high the temperature is, the more the top oil will be collectedD
The high temperature has little use on the separation of emulsified oil
考题
单选题A high temperature alarm or （） which will melt is used to guard against the explosion of compressor air pipelines.A
a flame trapB
a relief valveC
a fusible plugD
a bursting cap
考题
单选题The best method of extinguishing a class A fire is to （）.A
remove oxygen from the areaB
smother fire with foamC
smother fire with CO2D
cool fuel below ignition temperature
考题
单选题Which of the following statements is correct concerning the viscosity of lubricating oil?（）A
Viscosity will increase as temperature increasesB
Viscosity is a measure of a fluid s internal resistance to flowC
Viscosity will decrease as temperature decreasesD
Viscosity is not dependent on temperature
考题
单选题Which of the following statements describes the relationship between flash point and ignition temperature?（）A
Both are higher than normal burning temperaturesB
The flash point is always higherC
The ignition temperature is always higherD
They are not necessarily related
考题
单选题The lowest temperature at which a liquid gives off enough vapor to ignite in the presence of an ignition source is called its （）.A
boiling pointB
flash pointC
viscosity pointD
toxic point
热门标签
最新试卷
