更多"The heated feedwater entering any f"的相关试题:
[单项选择]The heated feed-water entering any flash chamber of a flash-type evaporator will（）
A. vaporize, with the un-flashed water remaining at the temperature at which it entered the flash chamber
B. vaporize, with the un-flashed eater equalizing to the saturation conditions existing in the f lash chamber
C. vaporize, with the remaining water a t a temperature greater than it entered the flash chamber
D. boil, allowing steam bubbles to rise through the brine at the bottom of the flash chamber
[单项选择]A flash-type evaporator discharges heated seawater into a chamber that is maintained at a pressure than the vapor pressure of the entering heated seawater, and subsequently the flashed water vapor thereby produced（）
A. lower condensing
B. higher cooling
C. lower cooling
D. higher condensing
[单项选择]The vapors given off by heated fuel oil are flammable, explosive, and （）
A. lighter than air
B. heavier than air
C. odorless
D. nontoxic
[单项选择]Which extinguishing agent will cool down a heated bulkhead in the least amount of time?（）
A. Water stream
B. Water fog or apray
C. Steam
D. Dry chemical
[单项选择]In the combustion chamber, the part whose surface is exposed to the highest temperature is the （）.
A. cylinder liner
B. cylinder cover
C. piston
D. exhaust valve
[单项选择]A heated bulkhead has the effect on a hygroscopic commodity of（）.
A. causing moisture to accumulate against the bulkhead
B. lowering the vapor pressure of the commodity
C. lowering the dew point of the air
D. raising the vapor pressure of the commodity
[单项选择]The cleaned heated oil, after passing through the centrifuges, is to be pumped to a （）.
A. settling tank
B. service tank
C. ballast tank
D. drain tank
[单项选择]Heavy residual fuel oils are heated prior to centrifuging to （）
A. reduce fuel weight
B. increase specific gravity
C. separate fuel from lube oil
D. reduce fuel viscosity
[单项选择]The crank chamber oil （）.
A. can be recovered
B. is only supplied to cylinders
C. only feeds the main bearing
D. is a kind of detergent
[单项选择]The rate of expansion of heated fuel oil varies with the （）.
A. conductivity
B. viscosity
C. volume
D. specific gravity
[单项选择]The vapors given off by heated fuel oil are heavier than air and are（）.
A. odorless
B. explosive
C. nontoxic
D. visible
[单项选择]On which of the following heated surfaces of a flash type evaporator would you be more likely to find soft scale formation?（）
A. Feed-water heater internal tube surfaces
B. Internal distillate cooler tubes
C. Flash chamber vertical surfaces
D. Distilling condenser tubes
[单项选择]Operating conditions in the crank chamber are very （） those in the cylinder.
A. the same as
B. similar to
C. separated from
D. different from
[单项选择]A diesel engine with a combustion chamber located between the crowns of two pistons is known as a/an （）.
A. double-acting engine
B. opposed pistons engine
C. single-acting engine
D. horizontal acting engine
[单项选择]What is the effect of heated intake air on a diesel engine? （）
A. Increases efficiency
B. Increases engine horsepower
C. Increases engine life
D. Reduces engine horsepower
[单项选择]When the heavy fuel oil is heated to achieve the viscosity of 10-15 cst, may occur.To avoid this, a system is used in most occasions（）
A. boiling and cavitations; low temperature
B. boiling and cavitations; pressurized
C. leaking and boiling; low temperature
D. leaking and boiling; pressurized
[单项选择]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 separation
B. Most of the oil and organic solvents are raised to the top layer
C. The high the temperature is, the more the top oil will be collected
D. The high temperature has little use on the separation of emulsified oil
[单项选择]Around the combustion chamber, all the main components are bore cooled to give low strains and the smallest, circumferentially symmetric deformations for good sealing between piston rings and liner（）
A. thermal
B. mechanical
C. plastic
D. elastic
