更多"A high temperature alarm or （） whic"的相关试题:
[单项选择]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 point
B. flash point
C. burning temperature
D. fire point
[单项选择]The temperature at which the air is saturated with water vapor and below which condensation of water vapor will occur is referred to as the（）.
A. precipitation point
B. vapor point
C. dew point
D. absolute humidity
[单项选择]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 point
B. fire point
C. upper explosive limit
D. lower explosive limit
[单项选择]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 point
B. flash point
C. viscosity point
D. toxic point
[单项选择]The temperature at which water vapor in the atmosphere begins to condense is called the （）.
A. dew point temperature
B. condensation temperature
C. psychometric temperature
D. absolute humidity temperature
[单项选择]When compared to air temperature,which factor is most useful in predicting fog?（）
A. Vapor pressure
B. Dew point
C. Barometric pressure
D. Absolute humidity
[单项选择]（） is the temperature at which a liquid fuel gives off sufficient vapor to form an ignitable mixture near its surface.
A. Setting point
B. Dew point
C. Flash point
D. Lean point
[单项选择]High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by （）.
A. engine overload
B. low combustion temperature
C. plugged fuel nozzle holes
D. excessive compression pressure
[单项选择]CFC refrigerants exposed to high temperature or direct flame, will decompose and may produce（）
A. methyl chloride
B. ammonia
C. hydrofluoric acid
D. ozone
[单项选择]A crew member reports that the high-pressure alarm light of a low-pressure CO2 fixed fire extinguishing system is illuminated. The most probable cause of this condition would be that（）.
A. an air leak has developed in the tank
B. the tank cooling system has malfunctioned
C. the pilot cylinder discharge valve is leaking
D. an excessive amount of insulation has been installed on the tank and piping
[单项选择]If the overflow tank high-level alarm sounds while the fuel oil tanks are being topped off, the engineer should （）.
A. close the static leg filling valve
B. close the overflow tank falling valve
C. reduce the fuel oil pumping rate
D. stop the fuel oil pumping operation
[单项选择]If the temperature in the icebox is too high, the trouble could be（）
A. a clogged scale trap
B. air in the system
C. automatic controls not functioning properly
D. insufficient cooling water to the condenser
[单项选择]Which will cause the high pressure cutout to stop the compressor in a R-22 system?（）
A. Condenser leakage
B. A shortage of liquid refrigerant
C. Excessive frost on the evaporator
D. Not enough condenser cooling water
[单项选择]Which is an acceptable means of correcting high mica between commutator bars?（）
A. undercutting
B. sanding
C. burnishing
D. filing
[单项选择]Which of the listed problems could produce a high absolute pressure within a flash type evaporator?（）
A. Production of high salinity distillate
B. Seawater feed temperature below 165℃
C. A leak in the first stage demister
D. A cracked distillate pump vent line
[单项选择]Which of the following would not cause high suction pressure?（）
A. insufficient refrigeration
B. leaky suction valves
C. expansion valve stuck open
D. suction valve not adjusted properly
[单项选择]The period at high or low tide during which there is no change in the height of the water is called the （）.
A. range of the tide
B. plane of the tide
C. stand of the tide
D. reversing of the tide
