更多"A connecting rod in a four-stroke/c"的相关试题:
[单项选择]Diesel engine main and connecting rod precision bearings are made in halvesEach half exceeds one-half the bearing circumference by a small amountThe small amount is termed （）.
A. clearance
B. crush
C. pitch
D. thrust
[单项选择]
An acceptable means of tightening connecting rod and main bearing cap bolts is to measure the （）
Ⅰ.torque applied to each nut and bolt assembly
Ⅱstretch of each nut before and after tightening
A. Ⅰonly
B. Ⅱ only
C. both Ⅰ and Ⅱ
D. neither Ⅰ nor Ⅱ
[单项选择]The connecting rod large end bearing shell generally has tags for location and oil grooves round the center of its axial length which correspond with grooves in the （） through which oil is transmitted up the rod to lubricate the small end.
A. connecting rod
B. piston rod
C. bearing housing
D. none of the above
[单项选择]The connecting rod is fitted between the crosshead and the crankshaftI t transmits the firing force, and together with the crankshaft converts the （）motion to a （）motion.
A. rotary；reciprocating
B. up and down；fore and aft
C. fore and aft；up and down
D. up and down；rotary
[单项选择]The design of the connecting rod large end bearing is similar to that of the mainbearings Whats the meaning of "that" in the sentence above?（）
A. the connecting rod
B. large end bearing
C. the main bearing
D. the design
[单项选择]Because the top of the connecting rod swings about the pin and changes direction each time the piston reaches mid-stroke, the relative speed between bearing and pin at mid-stroke is zero, （）to a maximum as the piston approaches top or bottom dead center and then （） back to zero again as the piston approaches mid-stroke and the connecting rod changes direction.
A. accelerates；decelerates
B. accelerates；accelerates
C. decelerates；decelerates
D. decelerates；accelerates
[单项选择]One method of constructing large marine diesel engines and reducing the total engine frame weight is through （）.
A. casting interlocking components
B. welding plates to form sections for assembly
C. forging integral components
D. case hardening integral components
[单项选择]（） is fully floating in both connecting rod small end and the piston skirt.
A. The piston rod
B. The cross head pin
C. The gudgeon pin
D. The crank-pin
[单项选择]The small end of the connecting rod is attached to the piston with a （）.
A. crankpin
B. sliding wedge
C. wrist pin
D. torque bashing
[单项选择]After changing out the fuel filters the diesel engine fails to restart, the most probable cause for this condition is a/an（）.
A. low compression
B. air-bound fuel system
C. improper spark
D. change in viscosity
[单项选择]While inspecting the main bearings on a diesel engine you find impregnated dirt and scratches in the bearing surface you would, therefore, suspect that （）
A. the bearing had been overheated
B. water was present in the oil
C. the lube oil was not being properly filtered
D. the maximum allowable bearing pressure had been exceeded
[单项选择]Because of the close tolerances used in diesel engine fuel oil pumps, a worn plunger requires（）
A. grinding the spare plunger to the barrel
B. replacing the plunger and the barrel
C. highly polishing both the plunger and barrel
D. replacing plunger only
[单项选择]How dose water enter the crankcase of a diesel engine?（）
A. Through the crankcase exhauster
B. As water vapor contained in blow-by
C. Demulsifying lube oil passing through the main bearings
D. Condensation from vapor formed in the expansion tank
[单项选择]Excessively worn, or polished ends on a diesel engine valve spring, indicate（）
A. burned exhaust valves
B. excessive spring compression
C. spring surge
D. worn valve seats
[单项选择]If water is found in the crankcase of a diesel engine, the cause may be due to（）
A. a cracked cylinder head
B. a leaky cylinder head gasket
C. a cracked cylinder liner
D. any of the above
[单项选择]Of a kind of liquid is used to cool the diesel engine, it is invariably called （）
A. lubricant
B. coolant
C. combustion product
D. second refrigerant
[单项选择]In a large, slow-speed, main propulsion diesel engine, which of the parts listed is under tension when the engine is running?（）
A. Bed plate
B. Column
C. Entablature
D. Tie rod
[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]Turbocharged four-stroke/cycle diesel engines utilize valve overlap for（）.
A. improving cylinder scavenging
B. preheating the combustion chamber
C. reducing air charge density
D. preventing valve wear
