更多"On engines having oil cooled piston"的相关试题:
[单项选择]The pistons are cooled by oil supplied from the forced （） system.
A. fresh water
B. sea water
C. lubrication
D. fuel oil
[单项选择]The pistons are cooled by （） oil from the forced lubrication.
A. being given
B. giving
C. supplying
D. being supplied
[单项选择]Fuel oil having a low cetane rating could result in（）
A. improved cold weather starting
B. excessive fuel oil consumption
C. reduced ignition lag
D. smoother engine operation
[单项选择]The burning of fuel oil in a diesel engine having a high sodium content, will cause （）
A. corrosion and grooving of exhaust valves
B. corrosion and gumming of the fuel injection pump
C. salt deposits in the exhaust manifold
D. slag deposits in the fuel injection equipment
[单项选择]Trunk type diesel engine pistons are effectively cooled when heat is（）
A. radiated through the engine block
B. transferred to water cooled cylinder walls
C. conducted through the piston crown
D. transferred to escaping exhaust gases
[单项选择]Pistons of marine medium speed diesel engines may be made of （） in order to keep the weight down for balancing purpose at high speed.
A. lead
B. forged steel
C. alloy steel
D. aluminum alloy
[单项选择]Cast iron pistons used in large propulsion diesel engines are constructed with （）
A. not taper what so ever
B. the skirt being tapered and smaller than the crown
C. the skirt being tapered and larger than the crown
D. the crown being tapered and smaller than the skirt
[单项选择]（）, we kept removing the pistons.
A. Late as it was
B. As it was late
C. Since it was late
D. Because of its late
[单项选择]（） provide the water to the pistons.
A. Pneumatic pipes
B. Hydraulic pipes
C. Telescopic pipes
D. Operating gas pipes
[单项选择]Many cast iron pistons are designed with heat dams, which serve to （）
A. keep piston crown temperatures elevated for smoother combustion
B. reduce the possibility of overheating the top compression ring
C. help retain the heat of compression to prevent ignition delay
D. help retain the heat of compression to prevent combustion knock
[单项选择]Aluminum pistons have （） coefficient of thermal expansion compared with those of cast iron.
A. higher
B. lower
C. the same
D. none of the above
[单项选择]An advantage of aluminum pistons, when compared to cast iron pistons is （）.
A. greater high temperature strength
B. better heat conductivity
C. greater weight per cubic inch
D. increased resistance to wear
[单项选择]Trunk-type diesel engine pistons are most effectively cooled by heat（）
A. conducted through the engine block
B. conducted to water cooled cylinder walls
C. conducted through the piston crown
D. loss to escaping exhaust gases
[单项选择]（） pistons have low inertia and high coefficient of thermal expansion.
A. Cast iron
B. Cast steel
C. Forged steel
D. Aluminum
[单项选择]（）, we continued lifting out the pistons.
A. Late as it was
B. As it was late
C. Since it was late
D. Because of its late
[单项选择]The usual number of single-acting pistons used in a variable stroke axial-piston pump is （）.
A. 3 or 5
B. 5 or 7
C. 7 or 9
D. 9 or 11
[单项选择]Due to （） action of pistons some relative motion between parts in contact in the coolant supply and return system must occur.
A. reciprocating
B. rotating
C. running
D. removing
[单项选择]Pistons may be made in （） in order to keep the weight down for balancing purposes at high speed.
A. cast iron
B. forged steel
C. stainless steel
D. aluminum alloy
