更多"At the top of the A-frames there is"的相关试题:
[单项选择]（） of the A-frames there is a strong cast iron frame called the scavenging air box.
A. At the top
B. At the bottom
C. In the top
D. In the bottom
[单项选择]A cast steel strong back is fitted in way of the combustion space to help absorb （）.
A. flame temperature
B. fuel oil
C. air movement
D. gas forces
[单项选择]On top of scavenging air box is mounted a strong cast iron frame for each cylinder known as（）
A. cooling jacket
B. cylinder liner
C. piston crown
D. cylinder cover
[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]Cast iron and gunmetal fittings are used freely in small sizes at moderate pressure; large fittings, those for high pressure and temperature are cast or mild steelIn the above sentence, the word “those” means （）.
A. east iron firings
B. mild steel fittings
C. small fittings
D. large fittings
[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]Cast irons weakness in tension and under shock loading limits its use to low pressure steam, air, oil and low speed water fittingsThe above sentence, most probably means （）.
A. cast iron has weakness
B. cast iron can stand up shock loading
C. cast iron fittings are only suitable in low pressure situation
D. east iron fittings are not suitable in low pressure situation
[简答题]Nothing Succeeds Without a Strong Will
[单项选择]"Cast iron has poor corrosion resistance to sea water, especially in the presence of bronzes" Implies（）.
A. east iron is a cheap material
B. cast iron can pollute sea water
C. cast iron has mere corrosive than bronzes to sea water
D. cast iron is more corrosive to sea water when it meets with bronzes
[单项选择]Cast iron carrier rings, （） machined grooves, are provided for all the pistons.
A. caulked into
B. caulking into
C. pressed into
D. screwed into
[单项选择]The area of strong westerly winds occurring between 40°S and 60°S latitude is called the（）.
A. polar easterlies
B. prevailing westerlies
C. roaring forties
D. jet streams
[单项选择]The cast iron guide-ways for （） are attached to the top section and seal off the crankcase.
A. the connecting rod
B. the cross-head
C. the piston rod
D. the air box
[单项选择]The cast iron（）for the cross-head are attached to the top section and seal off the crankcase.
A. cylinder cover
B. cross-head shoes
C. guide-ways
D. scavenging boxes
[单项选择]A strong back refers to a（）.
A. bar securing a cargo port
B. centerline vertical bulkhead
C. deep beam
D. spanner stay
[单项选择]If your vessel is dragging her anchor in a strong wind，you should（）.
A. shorten the scope of anchor cable
B. increase the scope of anchor cable
C. put over the sea anchor
D. put over a stern anchor
