更多"Low cylinder compression pressure a"的相关试题:
[单项选择]When one cylinder has a lower compression pressure and higher exhaust gas temperature than any of the other engine cylinders, which of the conditions listed will indicated?（）
A. Advanced ignition
B. Clogged air intake
C. Leaky exhaust valve
D. High exhaust pressure
[单项选择]A drop in compression pressure in one cylinder of a diesel engine can be caused by（）
A. a leaking fuel injection nozzle
B. a clogged air filter
C. early fuel injection
D. burned valves
[单项选择]High pressure and low pressure alarms must be tested（）.
A. no earlier than 24 hours prior to loading
B. no later than 24 hours prior to loading
C. anytime prior to loading
D. weekly
[单项选择]High cylinder firing pressure, accompanied by low exhaust temperature, can result from （）
A. improper fuel rack positing
B. lengthy exhaust valve duration
C. extend operation at light load
D. excessively early injection timing
[单项选择]What separate the high pressure side from the low pressure side in a refrigeration system?（）
A. Condenser and thermal expansion valve
B. King and solenoid valves
C. Compressor and thermal expansion valve
D. Condenser and solenoid valve
[单项选择]The device used for low-pressure control and high-pressure cutout on a compressor is called a（）
A. cutout
B. pressure controller
C. controller switch
D. cutout switch
[单项选择]If the head pressure is too high,（）
A. the relief valve should open before the high-pressure cutout
B. the relief valve should open and let excess refrigerant go to receiver
C. the high-pressure cutout switch should operate before the relief valve opens
D. close in on the suction valve
[单项选择]The greater the pressure difference between a high and a low pressure center，the（）.
A. dryer the air mass will be
B. cooler the temperature will be
C. greater the force of the wind will be
D. warmer the temperature will be
[单项选择]The period at high or low tide during which there is no change in the height of the water is called the （）.
A. range of the tide
B. plane of the tide
C. stand of the tide
D. reversing of the tide
[单项选择]The primary reason low pressure evaporators produce distillate more efficiently, and with less scale formation, than high pressure evaporators is （）.
A. evaporation is accomplished in a vacuum
B. due to the higher temperature of the incoming feed
C. due to the latent heat of evaporation principle
D. evaporation in a submerged medium produces more distillate
[单项选择]The refrigeration system low pressure cutout switch is actuated by （）.
A. an electric system manager
B. a sensing bulb at the tail coil of the evaporator
C. pressure changes in the suction line
D. failure of the king solenoid valve
[单项选择]In the Southern Hemisphere winds in a low pressure system rotate in a（）.
A. clockwise direction
B. northeasterly direction
C. northerly direction
D. counterclockwise direction
[单项选择]The circulation around a low pressure center in the Northern Hemisphere is（）.
A. counterclockwise
B. variable
C. clockwise
D. anticyclonic
[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]The low pressure side of a refrigeration system is considered to exist from the （）.
A. expansion valve to the compressor
B. receiver to the expansion coil
C. expansion valve to the evaporator
D. condenser to the expansion valve
[单项选择]A generally circular low pressure area is called a(n)（）.
A. cyclone
B. anticyclone
C. cold front
D. occluded front
[单项选择]Low pressure disturbances，which travel along the intertropical convergence zone，are called（）.
A. permanent waves
B. tidal waves
C. tropical waves
D. tropical storms
[单项选择]Low compression pressure in a diesel engine may be the result of （）
A. insufficient fuel supply due to fuel pump valves sticking or leaking
B. excessive mechanical clearance between the piston crown and cylinder head
C. excessively worn fuel pump plunger
D. excessive exhaust back pressure
