更多"The piston cooling system may emplo"的相关试题:
[单项选择]The piston cooling system may employ similar components, except that a drain tank is used instead of a head tank That means this system （）.
A. doesnt use a drain tank but a head tank
B. uses a drain tank not head tank
C. uses a drain tank and a head tank
D. uses neither a drain tank nor a head tank
[单项选择]A separate piston cooling system is used to limit any contamination （） piston cooling glands（） the piston cooling system only.
A. between；to
B. either；or
C. from；to
D. neither；nor
[单项选择]A separate piston cooling system is used （） any contamination from piston cooling glands to the piston cooling system only.
A. to help
B. to limit
C. to protect
D. to remove
[单项选择]The rim of the piston may contain cut-out portions to accommodate （） when they open.
A. the gases
B. the air
C. the valves
D. the injectors
[单项选择]A gudgeon pin in a trunk piston may be free to float and rotate, with （） to limit axial movement.
A. split pins
B. crankpins
C. dipsticks
D. circlips
[单项选择]Turbocharging system may be designed to operate on either the （） or the constant pressure exhaust system.
A. pulse
B. exhaust
C. fluctuating
D. hunting
[单项选择]Overheating of a hydraulic system may be a result of （）.
A. changing pump discharge pressure in response to normal load variations
B. a high oil level
C. incorrect fluid viscosity
D. continued slow re-circulation of the oil
[单项选择]Which system may be useful for messages，such as local storm warnings or a shore-to-ship distress alert，for which it is inappropriate to alert all ships in the satellite coverage area?（）
A. NAVTEX
B. EGC
C. AMVER
D. DSC
[单项选择]Control valves of a CO2 system may be located within the protected space when（）.
A. it is impractical to locate them outside
B. there is also a control valve outside
C. the CO2 cylinders are also in the space
D. an automatic heat-sensing trip is installed
[单项选择]A towing vessel’s fire detection system may be certified to comply with the Coast Guard’s towing vessel fire protection regulations by（）.
A. a Coast Guard inspector
B. a registered professional engineer
C. the owner or Master of the vessel
D. a licensed electrician
[单项选择]When may the automatic identification system (AIS) be switched off? （）
A. At anytime as long as it is properly logged
B. At the Master's professional judgment
C. Only when the vessel is at anchor or in port
D. Under no circumstance
[单项选择](Piston area)X(Piston stroke)K(numbers of the cylinders)=engine（）
A. brake horsepower
B. displacement
C. cylinder volume
D. cylinder clearance
[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]Piston cooling fins are located（）
A. atop the piston crown
B. beneath the piston crown
C. at the base of the piston skirt
D. inside the cylinder liner cooling water jacket
[单项选择]Insufficient end clearance on newly fitted piston rings in a diesel enginewill cause the rings to（）
A. jam in the most worn part of the cylinder when the rings expand
B. break in the most worn part of the cylinder when the rings expand
C. wear eccentrically on the side opposite the end gap
D. overheat and jam at the top center on the combustion stroke
[单项选择]Broken piston rings manifest themselves during the scavenge port inspection by（）
A. Lack of elastic tension, when the rings are pressed into the groove by means of a stick
B. Blackish appearance
C. Fractured rings and missing rings
D. all off the above
[单项选择]The function of diesel engine piston compression rings is to （）.
A. prevent piston side thrust
B. prevent engine friction losses
C. transmit heat from the piston to the cylinder liner
D. remove oil from the cylinder combustion space
[单项选择]The piston supporting body is mainly subjected to （） stress.
A. pushing
B. centrifugal
C. stretch
D. compressive
[单项选择]The piston rings are manufactured with a diameter （） the bore of the cylinder.
A. larger than
B. smaller than
C. equal to
D. none of the above
