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Steel strapping is used for ______．
A.bracing
B.blocking
C.tomming down
D.lashing
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A heavy steel device that is set on the sea floor and used as a drilling template in offshore drilling operations is called a ______.A.temporary guide baseB.permanent guide baseC.guide frameD.foundation template
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You are scheduled to load a bulk shipment of steel turnings．Which statement is TRUE ________．A.The primary hazard of this cargo is that it is subject to spontaneous heating and ignitionB.The shipping papers should describe this cargo as Waste，Steel BoringsC.After loading，you may not sail if the temperature in each hold of steel turnings exceeds 54℃D.This cargo may not be transported in bulk unless a special permit is issued by the competent authorities
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Can animals be made to work for us?Some scientists think that one day animals may be trained to do a number of simple jobs that are now done by human beings.
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Apes have been used in America in helping to make cars,and scientists believe that these large monkeys may be one day gather crops and even drive trains.
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The varnish is used to paint the （）(木制品) and deck rail.A、woodworkB、teamworkC、cargo workD、steel work
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to carry cargoes of low densityB
when stowage space is limitedC
to carry cargoes such as steel products or drumsD
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permanent guide baseC
guide frameD
foundation template
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单选题A heavy，thick-walled tube，usually steel，used between the drill pipe and the bit in the drill stem to weight the bit in order to improve its performance is called a（）.A
heavy-walled drill pipeB
tool jointC
down hole toolD
drill collar
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单选题What is the accepted standard for wire rope falls used in connection with the lifeboat gear?（）A
Six by seven galvanized wire ropeB
Six by twenty-four improved plow steel wire ropeC
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填空题Donald Jenkins of Halifax Regional Police suggests installing steel doors with a solid-steel strip.____
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ShroudsB
King postsC
StaysD
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单选题A fid is a（）.A
mallet used when splicing wire ropeB
sharp pointed crow bar used to unlay wire ropeC
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单选题A built-up exhaust valve is one in which （）.A
the stem and heads are made of different materialB
low-alloy steel is used throughoutC
a replaceable valve disk is welded to the headD
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单选题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
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hpair means high pressure airC
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单选题After more than one hundred years of steel production at Hallside, ______.A
the land could not be used for anything.B
it was impossible to use the land to build on.C
the land could then be built on.D
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单选题Which of the listed devices could be used as a ring groove tool during preparation for the installation of new rings?（）A
Steel brushB
Fine emery cloth or steel woolC
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单选题Strengthening damaged bulkheads by using wood or steel is called（）.A
bracingB
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单选题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 firingsB
mild steel fittingsC
small fittingsD
large fittings
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单选题Which of the listed design features is found in an exhaust valve and NOT in an intake valve?（）A
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Beveled edges on the valve headC
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Poppet type design
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单选题A vessel is constructed with a steel hull and an aluminum superstructure. Which statement is TRUE?（）A
The aluminum will provide greater resistance to the spread of fire by conductionB
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If the superstructure is stressed，an aluminum structure requires additional expansion joints to prevent fractureD
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