更多"The steam boiler is part of a close"的相关试题:
[单项选择]The process of loop scavenge is that the exhaust will be via ports （） the air ports and controlled by the same piston.
A. behind
B. far from
C. adjacent to
D. in front of
[名词解释]Conditional Loop Instructions
[单项选择]The closed-loop system differs from the open-loop system by（）
A. the lack of a feedback
B. the presence of a feed back
C. the lack of a computer
D. the presence of a computer
[单项选择]Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
A. double bottom fuel oil tank temperature
B. heater supply steam flow
C. pressure of the fuel supplied to the burners
D. attemperator steam flow in the heater discharge circuit
[单项选择]下列关于do while…loop和do…loop until循环执行循环体次数的描述正确的是（）。
A. do while…loop循环和do…loop until循环至少都执行一次
B. do while…loop循环和do…loop until循环可能都不执行
C. do while…loop循环至少执行一次，do…loop until循环可能不执行
D. do while…loop循环可能不执行，do…loop until循环至少执行一次
[单项选择]James Watt（）the steam engine.
A. was inventing
B. invented
C. had invented
D. has invented
[单项选择]The engine（）smoke and steam.
A. gives up
B. gives away
C. gives in
D. gives off
[单项选择]Steam smoke will occur when（）.
A. extremely cold air from shore passes over warmer water
B. warm dry air from shore passes over cooler water
C. cold ocean water evaporates into warm air
D. cool rain passes through a warm air mass
[单项选择]Water evaporates or steam condenses at the saturation temperature, which depends upon the pressure, the higher the pressure （） the saturation temperature.
A. the more
B. the higher
C. the lower
D. the highest
[单项选择]The principal difference between loop scavenging and crossflow scavenging, as used in single acting diesel engines, is the （）
A. direction of air flow within the cylinder
B. sequence of port opening
C. method of opening exhaust ports
D. volume of air admitted to the cylinder
[单项选择]LOOP指令属于（）类指令
A. 数据传送
B. 数据处理
C. 程序控制
D. 处理机控制
[名词解释]闭环控制 ( closed loop control)
[单项选择]Which of the listed types steam traps operates on the principle that hot water flashes to steam when its vapor pressure is rapidly reduced?（）
A. Ball float
B. Thermostatic
C. Bimetallic
D. Impulse
[单项选择]The steam coils in a high pressure evaporator used for saltwater service should be de-scaled with （）.
A. a needle gun
B. soap and water
C. a wire brush
D. a chipping hammer
[单项选择]The load between two steam-driven alternators operating in parallel may be adjusted by varying （）
A. the speed of the alternators
B. the field strength of the machines
C. the power factor of the alternators
D. steam supply to the prime movers
[单项选择]What is an advantage of diesel over steam turbine propulsion? （）
A. Less fuel consumption per SHP
B. Diesel fuel costs less than bunker C or its equivalent
C. Less routine maintenance required
D. Less weight per SHP
