The roller hatch beam at the edge of the open section of the hatch shall be ______ so that
A. braced
B. chopped
C. lashed or pinned back
D. locked
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What is the most probable cause of reduced capacity in a reciprocating air compressor ________.
A. Carbon on cylinder heads
B. Faulty unloader
C. Leaking air valves
D. Plugged air cooler
在无流海域,当风速为10m/s时,冰山的移速约为。
A. 0.2m/s
B. 2.0m/s
C. 5.0m/s
D. 10.0m/s
When the relative motion display is selected all tracked objects will display ______ vectors.
A. motion
B. stationary
C. dynamical
D. flashing
What is used to correct for both induced and permanent magnetism,and consequently must be
A. Flinders bar
B. Soft iron spheres
C. Fore-and-aft permanent magnets in their trays
D. Heeling magnet