更多"Which of the listed items will stop"的相关试题:
[单项选择]Which of the listed items should be secured before performing any maintenance on a solenoid operated air start valve?()
A. Electric power and starting air
B. Lube oil standby pump and control air
C. Hydraulic switch and engage jacking gear
D. Motor drain and pneumatic control system power
[单项选择]Which of the items listed causes a direct acting mechanical governor to operate the engine fuel control linkage?()
A. Hydraulic oil pressure
B. Servomotor action
C. Flyweight centrifugal force
D. Relay motion
[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 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 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
[单项选择]Which of the listed substances can be satisfactorily removed from diesel fuel by centrifuging?()
A. Sludge
B. Gasoline
C. Fuel oil
D. Lube oil
[单项选择]Which of the listed conditions will affective pressure the most in the cylinder of a diesel engine?()
A. TBN of the lubricating oil
B. Temperature of the lube oil
C. Completeness in the mixing of the fuel and air
D. Temperature of the cooling (sea) water
[单项选择]Which of the listed statements is a characteristic of the liquid charged power element used with thermostatic expansion valves?()
A. At the designed operating temperature, the liquid refrigerant charge has changed to a vapor
B. The liquid refrigerant tends to collect at the bellows or diaphragm and reduces the valve sensitivity
C. The sensing bulb is empty of liquid refrigerant charge at the designed operating temperature
D. The sensing bulb is never emptied of liquid refrigerant under normal operating conditions
[单项选择]Which of the listed cylinder liner surface conditions indicates proper lubrication?()
A. Dull black appearance
B. Bright appearance
C. Thin layer of lacquer
D. Thick oily film
[单项选择]Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?()
A. Pressure-reducing valve
B. Unloading valve
C. Counterbalance valve
D. Pressure-relief valve
[单项选择]Which of the listed diesel engine operating conditions should be checked immediately after any diesel engine is started?()
A. Exhaust temperature
B. Lube oil level
C. Lube oil pressure
D. Water level in the expansion tank
[单项选择]Which of the listed effects represents the purpose of heat treating steel?()
A. Develop ductility
B. Improve machining qualities
C. Relieves stresses
D. All of the above
[单项选择]In which of the listed refrigeration system components does superheating of the refrigerant take place?()
A. Expansion valve
B. Evaporator
C. Drier
D. Receiver
[单项选择]Which of the listed fire extinguishers is recommended for use on an electrical switchboard fire?()
A. CO2
B. ABC dry chemical
C. CO2 propelled foam
D. All of the above
[单项选择]Which of the listed materials would be considered as a bunting class "C" fire?()
A. Fuel oil
B. Wood
C. Celluloid
D. Electrical insulation
[单项选择]Which of the listed operating conditions would have the greatest effect on the volumetric efficiency of an operating reciprocating air compressor?()
A. The density of the air entering the compressor
B. The temperature of the air entering the compressor
C. The designed rotating speed of the compressor
D. A leaking head gasket