更多"Cold clearances between the skirt o"的相关试题:
[单项选择]The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.
A. remain constant along the tubes length
B. be greatest in a single pass counter flow heat exchanger
C. remain constant throughout the heat exchanger
D. vary from section to section through out the heat exchanger
[单项选择]Clearances of bridges and overhead cables below Bonneville Dam refer to heights in feet above mean （）.
A. lower low water
B. high water
C. low water
D. sea level
[单项选择]Excessive clearances in the main or crank-pin bearings will sometimes be indicated by （） before any bearing knock is heard.
A. loss of flow in the fuel system
B. loss of pressure in the air system
C. loss of flow in the lubricating system
D. loss of pressure in the lubricating system
[单项选择]An increase in rotor clearances in a rotary pump will （）.
A. increase discharge pressure
B. decrease pump capacity
C. decrease pump cavitation
D. decrease reaction ring clearance
[单项选择]（） clearances in the main or crank pin bearings will sometimes be indicated by loss of pressure in the lubricating system before any bearing knock is heard.
A. Too larger
B. Too smaller
C. Excess
D. Excessive
[单项选择]Abnormal crankpin bearing and piston skirt surface wear indicate（）
A. a restricted air intake
B. a clogged connecting rod oil passage
C. incorrect connecting rod alignment
D. high cylinder firing temperatures
[单项选择]The purpose of the skirt or trunk in four-stroke cycle engines is to act in a similar manner to a （）.
A. crosshead
B. crown
C. piston rod
D. connecting rod
[单项选择]The color of the skirt does not （） that of the coat.
A. balance
B. match
C. corresponding
D. accord
[单项选择]Aluminum lifeboats are subject to damage by electrolytic corrosion (the aluminum being eaten away). In working around boats of aluminum you must be very careful（）.
A. to keep the boats covered at all times
B. not to leave steel or iron tools lying in or near these boats
C. to keep an electric charge on the hull at all times
D. to rinse these boats regularly with salt water
[单项选择]Most conducting materials such as copper, aluminum, iron, nickel, and tungsten （）.
A. increase in resistance with increased temperature
B. increase in resistance with decreased temperature
C. decrease in resistance with increased temperature
D. increase in conductance with increased temperature
[单项选择]Aluminum pistons have （） coefficient of thermal expansion compared with those of cast iron.
A. higher
B. lower
C. the same
D. none of the above
[单项选择]An advantage of aluminum pistons, when compared to cast iron pistons is （）.
A. greater high temperature strength
B. better heat conductivity
C. greater weight per cubic inch
D. increased resistance to wear
[单项选择]After a cold front passes the barometric pressure usually（）.
A. fluctuates
B. remains the same
C. remains the same，with clouds forming rapidly
D. rises，often quite rapidly，with clearing skies
[单项选择]In extreme weather conditions, either hot or cold, control of the air conditioning plant presents （） difficulties.
A. few
B. little
C. a little
D. less
[单项选择]In order to prevent galvanic corrosion，an aluminum boat must be insulated from the davits and gripes. Which of the following is acceptable as an insulator?（）
A. Hard rubber
B. Canvas
C. Leather
D. Sponge rubber
[单项选择]A fire involving aluminum powder would be a class （）.
A. "A" fire
B. "B" fire
C. "C" fire
D. "D" fire
[单项选择]An aluminum piston has lower inertia and higher coefficient of （） compared to that of cast iron.
A. viscosity
B. twisting moments
C. inertia
D. thermal expansion
[单项选择]Your vessel is going from a warm climate to a cold climate with a hygroscopic cargo. Which statement is true?（）.
A. You must ventilate constantly and vigorously to combat ship sweat A.Press up the slack No.1 starboard double bottom tank
B. You should ventilate; there is little danger of ship sweat, but a possibility of cargo sweat
C. There is danger of heavy cargo sweat if you ventilate
D. There is little danger of any sweat problem
