更多"When the heat load begins to increa"的相关试题:
[单项选择]An increase in the heat load to a refrigeration system will cause （）.
A. the suction pressure to decrease
B. the suction temperature to increase
C. increased ice formation on the evaporator coil
D. excessive short cycling of the compressor
[单项选择]The process that occurs when heat is generated by a chemical reaction within a substance and continues to a point of ignition is known as （）.
A. chemical ignition
B. spontaneous combustion
C. chemical combustion
D. radiation ignition
[单项选择]When the load is increased on a turbocharged diesel engine, the amount of increased air supplied by the turbocharger will（）
A. lag behind the increased fuel supplied to the engine
B. enter the engine along with the increase in the fuel
C. enter the engine before the increased fuel supply
D. leave the turbocharger as a negative pulse
[单项选择]The needle valve will open when the fuel pressure acting on the needle valve （） exerts a sufficient force to overcome the spring compression.
A. tape face
B. tapered face
C. surface
D. thinner face
[单项选择]The greatest strain，when lifting a load with the jumbo purchase，is on（）.
A. all of the parts，dividing the load equally
B. the hauling part because it must absorb the frictional losses of all the sheaves
C. the parts in the movable block
D. the standing part because it is directly connected to the weight
[单项选择]When the boiler load returns to normal, the drum pressure will rise and steam bubble formation will reduce, causing a fall in water level This is known as （）.
A. swell
B. shrinkage
C. flash off
D. lack of water
[单项选择]The needle valve in a fuel valve will （） when the fuel pressure action on the needle valve tapered face exerts a force lower than that of the spring compression.
A. be jammed
B. be opened
C. be seated
D. be broken
[单项选择]A refrigerant gives up heat when it goes through （）.
A. condenser
B. regurgitate
C. evaporator
D. boil coil
[单项选择]When subjected to high heat from a open flame, or an electric heating element, which of the listed refrigerants will break down and produce phosgene gas?（）
A. CO2
B. Methyl chloride
C. R-22
D. Sulphur dioxide
[单项选择]Under identical load conditions，nylon，when compared with natural fiber line，will stretch（）.
A. less and have less strength
B. more and have less strength
C. more and have greater strength
D. less and have greater strength
[单项选择]A fluid coil will （）large quantities of heat when it changes state from a liquid to a vapor.
A. release
B. absorb
C. develop
D. regenerate
[单项选择]A fluid coil will （） large quantifies of heat when it changes state from a liquid to a vapor.
A. release
B. absorb
C. develop
D. regenerate
[单项选择]The amount of heat released by steam when it changes to water at the same temperature is called（）.
A. latent heat of condensation
B. latent heat of vaporization
C. latent heat of saturation
D. sensible heat of condensation
[单项选择]On a voyage charter，when a vessel is ready to load cargo，the Master should render to the charterer a（）.
A. Notice of Readiness
B. Master Certificate of Service
C. Shipmasters Declaration
D. Vessel Utilization and Performance Report
[单项选择]When a diesel engine is operate at partial load, as compared to full load ,a decrease will occur in the average （）
A. air quantity aspirated
B. fuel injection pressure
C. combustion pressure on the power stroke
D. compression on the compression stroke
[单项选择]Differential needle valves used in fuel injectors are directly closed by（）
A. cam action
B. spring force
C. fuel oil pressure
D. firing pressure
[单项选择]Which is the summer load waterline on the load waterline mark?（）.
A. The first line at the bottom
B. The second line from the bottom
C. The third line from the bottom
D. The fourth line from the bottom
