更多"[单选题]The purpose of annealing any m"的相关试题:
[单选题]Changing___of metal is the main purpose of heat treatment.
A.the weight
B.the size
C.the property
D.the shape
[单选题] The purpose of new technology is to make life easier, _____ it more difficult.
A. not make
B. not to make
C. not making
D. do not make
[单选题] Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called ______．
A.flux
B.poles
C.magnets
D.azimuth
[判断题]A state may declare at any time any member of the diplomatic mission persona non grata, in which case the sending state must withdraw the person.
A.正确
B.错误
[单选题] What is the main purpose of DGPS?
A.Improve positioning accuracy
B.Decrease positioning accuracy
C.Reduce operational cost
D.I don't know
[单选题] What is the main purpose of dunnage?
A. To act as ballast for light vessels
B. To provide ventilation and drainage for cargo
C. To secure the tarpaulins in place
D. To support weakened builkheads
[单选题] What is the purpose of VRM control ?
A. To measure distance accurately
B. To measure bearing accurately
C. To measure range and bearing
D. To adjust radar monitor
[单选题] The principal purpose of adjustment of the magnetic compass is to eliminate（消除） ______ as far as possible.
A. variation
B. compass error
C. deviation
D. earth's magnetic force
[多选题]The purpose of the United Nations are:
A. to maintain international peace and security.
B. to develop friendly relations among nations.
C. to achieve international cooperation in solving international problems.
D. to be a center for harmonizing the actions of nations.
[单选题] What is the purpose of a Pedestal Roller?
A.To change the direction of lead on a mooring line
B.To secure a chain
C.To secure the eye of a mooring line
D.To facilitate towing
[单选题] What is the purpose of the radar reflector?
A. To make objects less visible
B. To make echoes weaker on the radar
C. To make large echoes smaller
D. To make small objects better visible
[单选题] What is the purpose of the limit switch on gravity davits ________．
A.To cut off the power when the davits hit the track safety stops
B.To stop the davits from going too fast
C.To cut off the power when the davits are about 12 inches or more from the track safety stops
D.None of the above
[单选题] What is the purpose of the girders in the tank?
A. They support the stiffeners
B. They transfer all the sea forces acting on the plating
C. They support the stiffeners and take up some of the sea forces
D. I don’t know
[单选题] The purpose of the tripping line on a sea anchor is to ______．
A.Aid in casting off
B.Direct the drift of the vessel
C.Aid in its recovery
D.Maintain maximum resistance to broaching
[单选题] The purpose of the tricing pendants is to ______．
A.Control the fore and aft motion of a lifeboat during lowering
B.Control the outboard swing of a lifeboat during lowering
C.Provide suspensions for the manropes
D.Hold a lifeboat next to the embarkation deck while loading
[单选题] The purpose of air tanks in a lifeboat is to ______．
A.Make the boat float higher
B.Provide a stowage place for provisions
C.Add strength to the boat
D.Keep the boat afloat if flooded
[单选题] For the purpose of training and drills，if reasonable and practicable，rescue boats on board must be launched with their assigned crew ______.
A. once a week
B. once a month
C. once a year
D. twice a year
