更多"A cast steel strong back is fitted "的相关试题:
[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]The circular steel structure installed around the propeller of a towboat is the（）.
A. nozzle
B. shroud
C. strut
D. hood
[单项选择]A heavy steel curved arch constructed athwartships and above the after deck on a towing vessel is sometimes called a（）.
A. main brace
B. tow span
C. jockey bar
D. None of the above
[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
[单项选择]Stainless steel is material commonly used for temperatures up to 50℃; beyond that and for severe corrosive conditions other materials are requiredThe bold and italic word “that” probably means （）.
A. stainless steel
B. temperature
C. 50℃
D. other materials
[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]The joint formed when two steel plates are placed end-to-end is called a（）.
A. bevel
B. seam
C. butt
D. bond
[单项选择]Experience shows that where signs of rust on steel shipments are apparent at the time of shipment，Mates-Receipts and Bills of Lading need not necessarily in all cases be（）with the single word “rusty”.
A. claused
B. worded
C. given
D. written
[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 stainless steel bars are painted by（）.
A. lot
B. lots
C. a lot
D. the lots
[单项选择]A small light tackle with blocks of steel or wood that is used for miscellaneous small jobs is called a（）.
A. snatch block
B. threefold purchase
C. handy-billy
D. chockablock
[单项选择]What is the purpose of cant frames in steel vessels? （）
A. To support the overhang of the stern
B. To provide strength to shell plating at the stern
C. To add strength to the deck beams which support the weather decks
D. To support the plating of a cylindrical tank
[单项选择]Seamless mild steel is used for steam (also copper for moderate pressure and temperature), h-pair, feed discharge and all oil fuel pressure pipingsAccording to the above sentence, which of the following statements is not true?（）
A. Both seamless mild steel and copper may be used for middle pressure steam
B. "hpair" means high pressure air
C. The feed piping of the boilers can be made of seamless mild steel
D. All oil pipings are made of mild steel
[单项选择]At the top of the A-frames there is a strong cast iron frame called （）.
A. cylinder liner
B. cylinder cover
C. the gear box
D. the scavenging box
[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
