更多"Which of the fluids listed is norma"的相关试题:
[单项选择]Which of the combustion parameters listed is used in a diesel engine, but NOT related to the injection system?（）
A. Atomization
B. Metering
C. Effective stroke
D. Penetration
[单项选择]Which of the materials listed is used as the dynamic seal material on mechanical seals installed on most centrifugal pumps used in water service?（）
A. Copper
B. Copper and carbon
C. Carbon
D. Bronze
[单项选择]Which of the listed devices is used to measure pressure and convert it to an electrical signal?（）
A. Transducer
B. Reducer
C. Transformer
D. Rectifier
[单项选择]Which of the valves listed should be used either in the fully opened or the fully closed position?（）
A. A gate valve
B. A globe valve
C. Any check valve
D. Any needle valve
[单项选择]Which of the devices listed, when used on an electro-hydraulic steering gear, keeps the movement of the redder closely in step with the steering wheel?（）
A. The follow-up gear
B. The rudder angle indicator
C. The synchronous electric transmitter
D. A rudder angle limit switch
[单项选择]Which of the listed devices could be used as a substitute for a ring grooving tool?（）
A. Steel brush
B. Fine emery cloth or steel wool
C. A section of the removed compression ring
D. A case hardened scraper
[单项选择]Which of the listed devices could be used as a ring groove tool during preparation for the installation of new rings?（）
A. Steel brush
B. Fine emery cloth or steel wool
C. A section of the removed compression ring
D. A case hardened scraper
[单项选择]Which of the listed conditions can be used to determine if lube oil has been diluted by fuel? （）
A. Viscosity is decreased
B. Octane number is altered
C. Pump speed is decreased
D. Blower’s speed is decreased
[单项选择]Connecting rods in a diesel engine are used to connect the （）.
A. engine to the bed
B. rocker arm to the camshaft
C. crankshaft to the gear train
D. piston to the crankshaft
[单项选择]A low pressure annular preventer which is used to direct flow of kick fluids away from the rig floor is called a （）.
A. dump valve
B. deflector
C. separator
D. diverter
[单项选择]Freon 12 which is used to produce intense cold is normally a （） when at atmospheric pressure and temperature.
A. liquid
B. gas
C. solid
D. water only
[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 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 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 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 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
