更多"The primary purpose of oil control "的相关试题:
[单项选择]To function properly, oil control rings used on a diesel engine piston must distribute sufficient oil to all parts of the cylinder wall and must also（）.
A. prevent any lubricant from reaching
B. prevent excessive lubrication from reaching the combustion space
C. Provide metal-to-metal contact to seal the cylinder against blow-by
D. assure a positive means of scraping carbon accumulation from the cylinder
[单项选择]Oil control rings used in two-stroke/cycle diesel engines are located near the bottom of the piston skirt in order to （）
A. increase the liner area covered by the oil film
B. maintain an oil film on the lower liner where scuffing is prevalent
C. keep excess oil away from intake and exhaust ports
D. help cushion piston skirt side thrust by providing a hydrodynamic oil wedge
[单项选择]What is the primary purpose for Digital Selective Calling (DSC)?（）
A. DSC provides reception of weather and navigational warnings plus search and rescue information
B. DSC provides low-cost，routine communications for the vessel operator
C. DSC is to be used for transmitting and receiving distress alerts to and from other ships or coast radio stations via radio
D. This aids SAR authorities in tracking a vessel's position by satellite
[单项选择]What is the primary purpose of a splint applied in first aid?（）
A. Control bleeding
B. Reduce pain
C. Immobilize a fracture
D. Reset the bone
[单项选择]The primary purpose of a load line is to establish required（）.
A. minimum freeboard
B. GM
C. transverse stability
D. fresh water allowances
[单项选择]The preferred type of pollution control for oil spills on the water is(are) （）.
A. straw
B. booms
C. skimmers
D. chemical dispersants
[单项选择]The main purpose of the piston oil scraper rings is to （）.
A. seal the space between the piston and the liner
B. reduce the amount of lube oil burned in the combustion chamber
C. transmit heat from the piston to the cylinder liner
D. damp out fluctuations of the piston side thrust
[单项选择]The film of oil between the rings and the liner is not only essential for the lubrication but also plays an important part in achieving （）.
A. an oil seal
B. removing heat
C. a gas seal
D. cooling the piston
[单项选择]When discharging oil from an oil tanker the instantaneous rate（）60 liters per nautical mile.
A. Should not exceed
B. Must be up to
C. Should exceed
D. Should be about
[单项选择]Unless such oil tanker carries crude oil which is not suitable for crude oil washing，the oil tanker shall（）the system in accordance with the requirements of that Regulation.
A. operate
B. check
C. install
D. overhaul
[单项选择]Machinery driving fuel oil transfer and fuel oil service pumps must be fitted with a remote means of stopping the machinery from （）.
A. within the space concerned
B. outside the space concerned
C. the throttle station
D. within the fire room
[单项选择]
When fuel oil is accidentally missed with lube oil which of the following processes can be used to separate them?（）
Ⅰ.filtering
Ⅱ.settling
A. Ⅰ only
B. Ⅱ only
C. either Ⅰ or Ⅱ
D. neither Ⅰ or Ⅱ
[单项选择]The oil discharge monitoring system in the oil tanker vessels is used for detecting the amount of oil discharged overboard to ensure that it does not exceed（）
A. 15 liters nautical mile
B. 30 liters nautical mile
C. 60 liters nautical mile
D. 100 liters nautical mile
[单项选择]The term OIL as used in the Oil Pollution Regulations means（）.
A. fuel oil
B. sludge
C. oil refuse
D. All of the above
[单项选择]Diesel engine lube oil diluted with fuel oil is indicated by（）
A. decreased viscosity
B. decreased pour point
C. increased flash point
D. increased viscosity
[单项选择]Cylinder oil is a high viscosity mineral oil, with a （） machined to the anticipated sulfur content of the fuel.
A. TAN
B. TBN
C. SAN
D. SBN
[单项选择]When separating fuel oil in oil separator, the separating quantity is（） of the real quantity.
A. 100%
B. 80%
C. 1/2
D. 1/3
[单项选择]The lube oil cooler is located after the lube oil filter in order for （）
A. the filter to operate more efficiently
B. the lube oil cooler to be bypassed
C. positive lube oil pump suction to be assured
D. galvanic action in the cooler to be minimized
