更多"Which of the listed bearing types i"的相关试题:
[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]Which of the listed types of starting systems is often used on large, low-speed, direct reversing, main propulsion diesel engines?（）
A. Electric
B. Hydraulic
C. Air
D. All of the above
[单项选择]Which of the listed types of files is the best for producing a fine finish on metal?（）
A. Mill
B. Float
C. Warding
D. Second cut
[单项选择]Which of the devices listed is common to all types of pumps?（）
A. A power end and fluid end
B. A propeller and educator
C. A volute and impeller
D. A turbine and piston
[单项选择]Which types of portable fire extinguishers are designed for use on electrical fires?（）
A. Dry chemical and carbon dioxide
B. Foam (stored pressure) and soda-acid
C. Carbon dioxide and foam (stored pressure)
D. Dry chemical and soda-acid
[单项选择]Which types of portable extinguisher should you watch for the reflash of the fire?（）
A. foam and water
B. CO2 and dry chemical
C. dry chemical and water
D. foam and CO2
[单项选择]The bearing of tailshaft sealing equipment, which adopting the oil nature circulation is hot, the reason is（）
A. the rotate speed fluctuation
B. the ventilation tube clogged
C. the main engine accelerate so fast
D. stormy waves
[单项选择]A main bearing consists of two shells which are secured by means of studs and （）.
A. tie rods
B. through bolts
C. lead wires
D. bearing caps
[多项选择] Into which two types of areas would an area border router (ABR) inject a default route?（）
A. stub
B. the autonomous system of an exte rior gateway protocol (EGP)
C. NSSA
D. totally stubby
E. the autonomous system of a different interior gateway protocol (IGP)
F. area 0
[单项选择]Which term describes piston pins having bearing surfaces in both the piston bosses and connecting rod eye?（）
A. Stationary
B. Full floating
C. Semi-floating
D. Free rolling
[单项选择]As to the bearing, of the following, which statement is not true?（）
A. ff overheat is found, the engine must be stopped for inspection
B. Much heat of the crankcase door indicates that the bearing is overheated
C. If bearing clearance is too large, knocking will be heard in the crankcase
D. If bearing clearance is too large or too small, the white metal may be melted
[单项选择]Which of the listed refrigeration system components keeps the refrigerant circulating through the system?（）
A. Expansion valve
B. Condenser
C. Evaporator
D. Compressor
[单项选择]Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
A. Sensitivity
B. Power
C. Speed droop
D. Compensation
[单项选择]Which bearing will carry the load on two small points diametrically opposite to each other?（）
A. Needle
B. Tapered roller
C. Roller
D. Ball
[单项选择]Which of the routine maintenance procedure listed is required for starting air receivers?（）
A. Frequent draining of accumulated moisture
B. Frequent testing of relief valves
C. A close watch on temperature to prevent fluctuations in pressure
D. Frequent cleaning to re move oil and foreign matter
[单项选择]Which of the routine maintenance procedures listed is required for starting air receivers?（）
A. over-speeding
B. overload
C. low exhaust temperature
D. high crankcase pressure
[单项选择]Which of the following types of hydraulic pumps would be used in a steering system?（）
A. Lobe
B. Screw
C. Radial piston
D. Volute
[单项选择]Which of the listed statements is correct concerning the starting of centrifugal pumps?（）
A. They should always be started with the discharge valve closed
B. They should always be started with the discharge valve opened
C. A priming pump is always required to flood the impeller suction
D. They should always be started with the sealing line valves closed
