A.It is corrosive
B.It is odorless
C.It is visible as h blue fog
D.It has a distinctive taste
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A.settling in a fuel tank
B.testing in a laboratory centrifuge
C.burning in a calorimeter
D.testing in a closed cup
A.1382 tons
B.1561 tons
C.1600 tons
D.1637 tons
A.It is lower than the ignition temperature
B.It is the temperature at which a substance will spontaneously ignite
C.It is the temperature at which a substance, when ignited, will continue to bum
D.It is the temperature at which the released vapors will fall within the explosive range
A.bubbling refrigerant
B.overheating and oxidation
C.lowered operating temperatures
D.reducing the cloud or flash point
A.Impeller
B.Electric motor
C.Volute
D.Eye
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最新試題
The control mode in which the final control element is moved from one of two flexed positions to the other is known as ().
The rate of heat transfer from a hot region to a cold region is affected most by the ().
When the steering gear is in operation, you should ().
Thermostatic expansion valves can be adjusted for ().
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?()
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will ().
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is ().
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by ().
The usual symptoms of cavitation in a centrifugal pump is ().
Which of the listed pumps is NOT a positive displacement pump?()