更多"The process of waiting a period of "的相关试题:
[单项选择]If over a period of time, the oi1 film partially disappears, so that dry areas are formed on the cylinder wall, these areas and the piston surfaces will by frictional interaction, become finely scuffed and hardened, iegood mirror surface" will have deterioratedWhat condition of the piston rings can result in this phenomenon?（）
A. micro-seizure
B. sticking
C. scratched
D. breakage/collapse
[单项选择]HTML的〈PRE〉…〈/PRE〉标记的作用是（）。
A. 将文本分段显示
B. 中断文本中的某一行
C. 给网页命名
D. 将文本按原样进行显示
[单项选择]The approval period for a shipboard Oil Pollution Emergency Plan expires after（）.
A. two years
B. three years
C. four years
D. five years
[单项选择]The approval period for a shipboard oil pollution emergency plan expires after （）.
A. one year
B. two years
C. four years
D. five years
[单项选择]The longer the ignition delay period resulting from improper use of low cetane fuel, the （）
A. less fuel will enter the cylinder
B. higher the cylinder combustion temperature
C. more complete the fuel combustion
D. more rapid the rise in combustion pressure
[单项选择]What is the default routing update period for RIPv2?（）
A. 15 seconds
B. 30 seconds
C. 180 seconds
D. 240 seconds
[单项选择]When the wave period and the apparent rolling period are the same（）.
A. synchronous rolling occurs
B. roll period decreases
C. roll period increases
D. roll amplitude is dampened
[单项选择]In general，the most effective period for observing stars and planets occurs during the darker limit of（）.
A. sunset
B. civil twilight
C. nautical twilight
D. astronomical twilight
[单项选择]The rate of pressure rise during the period following fuel ignition in a diesel will result in （）
A. valve overlap
B. volumetric efficiency
C. turbulence of the air change
D. fuel efficiency
[单项选择]During the valve overlap period, the exhaust pressure of a turbochargers, four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure （）
A. effective cylinder scavenging and cooling
B. constant pressure from the turbochargers
C. cooler operation of the exhaust system
D. effective constant pressure for turbocharger operation
[单项选择]The period when both inlet valves and exhaust valves are open is referred to as （）.
A. valve loop
B. valve uniflow
C. valve overlap
D. valve grinding
[单项选择]During the fuel injection period, fuel pressure must exceed cylinder gas pressure to （）.
A. ensure penetration and distribution of the fuel in the combustion chamber
B. ensure the needle valve is flushed clean during each injection
C. prevent combustion gas blowback into the open needle valve
D. prevent reflected pressure waves when the needle valve closes
[单项选择]During a period of whiteout，you should expect which of the following（）.
A. Snowfall or blowing snow
B. Lack of ability to estimate distance
C. Harsh contrast between sun-illuminated snow cover and the background
D. Hazy horizons with extensive mirage effects
[单项选择]No specific period is given for the renewal of the lubricating oil filter element as this should be done（） a figure of 0√7 bars is shown on the gauge.
A. whatever
B. whenever
C. wherever
D. whoever
[单项选择]The period of valve overlap is when （）.
A. the inlet valve is open
B. the exhaust valve is open
C. both valves are close
D. both valves are open
[单项选择]In observing rig motion while under tow，the period of roll is the time difference between（）.
A. zero inclination to full inclination on one side
B. full inclination on one side to full inclination on the other side
C. full inclination on one side to the next full inclination on the same side
D. zero inclination to the next zero inclination
[单项选择]The cooling water temperature （） over a period of 8 hours, and then shut down.
A. should be gradually increased
B. should be gradually reduced
C. should be constantly kept
D. should be varied up and down
[单项选择]The longer the ignition delay period occurs in a diesel engine, the （）.
A. less fuel will enter the cylinder
B. lower will be cylinder compression temperatures
C. more complete will be fuel combustion
D. more rapid will be the rise in combustion pressure
