In an engine with a pot-shaped piston, some lubricating oil from the main bearing will pass along a （） in the crankshaft to the bottom end bearing andthen up a connection rod to the gudgeon pin.

A . top of the ring groove B . cylinder liner oil film C . bottom of the ring groove D . back of the ring groove

A . Use the CO system and evacuate the engine room B . Use the fire main system and evacuate the engine room C . Evacuate the engine room and use the CO system D . Evacuate the engine room and use the fire main system

A . send B . sends C . was sent D . were sent

A . slightly acidic condition B . slightly alkaline condition C . overtreatment of water D . neutral condition of water

A . ignition lag B . engine horsepower C . lube oil system pressure D . specific fuel consumptio

A . increase B . decrease C . fluctuate D . remain constant

A . Use the C0 system and evacuate the engine room B . Use the fire main system and evacuate the engine room C . Evacuate the engine room and use the C0 system D . Evacuate the engine room and use the fire main system

A . maintain higher than normal jacket water temperature B . change the lube oil more frequently than normal C . maintain a higher air-box temperature than normal D . maintain a higher air-box pressure than normal

A . increase thermal efficiency B . cause clogging of the fuel system C . increase the ability of the engine to start in cold weather D . produce corrosion in the cylinder and exhaust system at low load

A . soft water pump was not secured along with the engine B . jacket water thermostat has failed C . cylinder liner may be cracked D . raw water pump is over-speeding just prior to engine shutdow

A . crosshead B . crankpin C . crank journal D . gudgeon pi

A . speed will drop drastically with any increase in load B . will stop due to zero fuel supply C . will stall upon application of load D . speed will remain fairly constant despite load change

A . pilot valve oil pressure B . speeder spring force C . compensation needle valve clearance D . centrifugal force on the flyweight

A . cannot be detected tinder normal conditions B . is of no consequence to engineering personnel C . is indicated at the branch circuit breaker panel D . is indicated by the ground detecting lamps on the main switchboard

A . Crankshaft revolution B . Type of engine (diesel or gasoline) C . Distance a piston travels during a stroke D . Number of pisto

A . opposed-piston engine B . double-acting engine C . two-stroke/cycle engine D . four-stroke/cycle engine

A . a reduction B . an increase C . an outing D . a downward

A . clogged fuel injection pumps B . increased cylinder liner wear C . intake valve stem corrosion D . varnish deposit on pisto

A . kerosene B . unleaded gasoline C . diesel oil D . liquefied ga

A . completely closing the compartment B . closing the compartment except for the ventilators C . leaving the compartment open to the air D . increasing the air flow to the compartment by blower

A . check the flame arrester B . check the fuel tank C . check the battery D . ventilate the bilge

A . high exhaust temperature B . low exhaust temperature C . fuel knock in each cylinder D . mechanical knock in each cylinder

A.increase thermal efficiency B.cause clogging of the fuel system C.increase the ability of the engine to start in cold weather D.produce corrosion in the cylinder and exhaust system at low loads

I chose to study engineering at a small liberal-arts university that doesn't even offer a major in electrical engineering. Obviously, this was not a practical choice; I came here for more noble reasons. I wanted a broad education that would provide me with flexibility and a value system to guide me in my career. I wanted to open my eyes and expand my vision by interacting with people who weren't studying science or engineering. My parents, teachers and other adults praised me for such a sensible choice. They told me I was wise and mature beyond my 18 years, and I believed them. I headed off to college, feeling sure I was going to have an advantage over those students who went to big engineering "factories" where they didn't care if you had values or were flexible. I was going to be a complete engineer: technical genius and sensitive humanist all in one. Now I'm not so sure. Somewhere along the way my noble ideals crashed into reality, as all noble ideals eventually do. After three years of struggling to balance math, physics and engineering courses with liberal arts courses, I have learned there are reasons why few engineering students try to reconcile engineering with liberal-arts courses in college. The reality that has blocked my path to become the typical successful student is that engineering and the liberal arts simply don't mix as easily as I assumed in high school. Individually they shape a person in very different ways; together they threaten to confuse. The struggle to reconcile the two fields of study is difficult. The author chose to study engineering at a small liberal-arts university because he ______. A．intended to be a sensible student with noble ideals B．wanted to be an example of practicality and rationality C．intended to be a combination of engineer and humanist D．wanted to coordinate engineering with liberal-arts courses in college 此题为多项选择题。