更多"To lubricate the swivel or remove c"的相关试题:
[单项选择]In order to properly remove air from the casing of a centrifugal pump when starting, the pump should have a （）.
A. positive head
B. negative suction head
C. mechanical seal
D. vent valve attached to the casing at the top of the volute
[单项选择]When to remove scale from the cooling spaces, acid solution （） in the system can be tested from time to time by putting some on to a piece of lime.
A. strength
B. dense
C. percentage
D. velocity
[单项选择]It is necessary to remove （） from the cooling water spaces to improve heat transfer.
A. lime
B. frost
C. scale
D. scar
[单项选择]It is necessary to remove （） from the cooling spaces.
A. scar
B. scale
C. spur
D. bilge
[单项选择]Expansion tank should be used to remove （） from cooling water.
A. scale
B. sludge
C. chemicals
D. air
[单项选择]In order to remove the carbon deposit from the threaded recess, we can use（）
A. a driver
B. a scraper
C. a tap
D. a file
[单项选择]Head tank should be used to remove （） from cooling water.
A. scale
B. sludge
C. chemicals
D. air
[单项选择]Wristpin bearings are difficult to lubricate because of their oscillating motion and（）
A. their free-floating design
B. their relatively small size
C. the reciprocating motion of the piston
D. their position in the lubrication system
[单项选择]Oil will lubricate these parts （） effectively than water.
A. much
B. more
C. most
D. less
[单项选择]The lube oil to lubricate the surfaces of the cylinder liners is spread over by the （）.
A. sliding piston rings
B. engines camshaft
C. small pumps
D. forced feed system
[单项选择]A grease gun is generally used to lubricate a （）.
A. condensate pump ball bearing
B. main shaft bearing
C. main turbine bearing
D. diesel engine wrist pin bearing
[单项选择]You are preparing to lubricate standing rigging on your vessel．When rigging a bosun’s chair on a stay with a shackle，（）.
A. Connect the shackle to the bosun's chair with a hook
B. Never allow the shackle pin to ride on the stay
C. Run the gantline through the shackle and then make fast to the bosun's chair
D. Tie the bitter end of the gantline to the shackle before shackling it to the bosun's chair
[单项选择]Oxygen corrosion in auxiliary boilers is prevented by treating the boiler feed tank with either sodium （）
A. sulfite or hydrazine
B. sulfite or hygroscopic sulfite
C. bromide or hydrazine
D. bromide or hygroscopic sulfite
[单项选择]Exhaust valve grooving and corrosion is caused by certain components of residual fuel oilThese components are sodium, sulfur, and （）.
A. vanadium
B. carbon
C. copper
D. ash
[单项选择]In order to prevent galvanic corrosion，an aluminum boat must be insulated from the davits and gripes. Which of the following is acceptable as an insulator?（）
A. Hard rubber
B. Canvas
C. Leather
D. Sponge rubber
[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]To minimize corrosion, fuel oil strainer disks, spacers and scraper blades are made of （）.
A. brass
B. copper
C. iron
D. monel metal or stainless steel
[单项选择]Corrosion inhibitors and/or soluble oils are added to diesel engine cooling systems to （）
A. maintain low pH in the cooling water
B. reduce the cooling water temperature
C. increase cooling water hardness
D. form a protective film on metal surfaces
[单项选择]Corrosion and grooving on the blade of an exhaust driven turbocharger is caused by certain components of residual fuel oilsThese components are vanadium,sodium, and（）
A. copper
B. carbon
C. hydrogen
D. sulfur
