更多"The purpose of the safety relief va"的相关试题:
[单项选择]Cargo pump relief valves are piped to the（）.
A. cargo pump pressure gauges
B. crossover lines interconnecting two pumps
C. suction side of pumps
D. atmosphere through pump vents
[单项选择]Blow-off of the relief valves of the main cylinders during operation indicates （）.
A. the cylinder cover is cracked
B. the injector holes is clogged
C. the cams are not properly set
D. fuel pump is leaking
[单项选择]Blow-off of the relief valves of the engines cylinders may be caused by （）.
A. too low lead
B. water in fuel
C. too tight spring
D. leakage
[单项选择]The safety valves should be tested and adjusted when the boiler survey is （）
A. completed
B. carried out
C. cleaned
D. steamed
[单项选择]Safety valves on a boiler vent to the （）.
A. fuel tank
B. bilge
C. atmosphere
D. auxiliary exhaust line
[单项选择]The safety valves are mounted in pairs to （） the boiler against overpressure.
A. use
B. release
C. protect
D. effect
[单项选择]What is the purpose of a relief valve?（）
A. to fill 2 tanks at the same time
B. to use pump at a higher pressure
C. to return liquid to suction side if discharge valve is closed
D. All of the above are true
[单项选择]Temperature control valves installed in the jacket cooling water system of a diesel engine modulates the rate of water flow through the （）.
A. cooling water pump
B. nozzle cooling passages
C. cylinder jackets
D. heat exchanger
[单项选择]Bottom blow valves are installed on auxiliary water-tube boilers to （）
A. completely drain the boiler in an emergency
B. prevent sludge from forming in the drum
C. remove floating impurities from the boiler water surface
D. remove settled solids from the water drum
[单项选择]What is the purpose of the intake/exhaust valves in a diesel engine? （）
A. They regulate the combustion cycle
B. They supply cooling water
C. They synchronize the ignition spark
D. They supply and regulate the lubricant flow
[单项选择]What is the purpose of pressure-vacuum relief valves? （）
A. Regulation of discharge pressure from cargo pumps
B. Maintaining constant velocity in cargo lines
C. Regulation of suction head on cargo pumps
D. To maintain a tank or void at atmospheric pressure
[单项选择]The purpose of the GMDSS is to（）safety of life and property at sea all over the world.
A. promote
B. improve
C. guarantee
D. both A and B
[单项选择]In comparison to exhaust valves, intake valves of diesel engines may be fabricated from low alloy steels because （）.
A. the beveled edges of the intake valves provide for serf-centering during seating
B. intake valves utilize stellite-coated valve seat inserts which reduce wear
C. the volume of air passing through intake valves is less than the volume of air passing through exhaust valves
D. intake valves are less affected to the corrosive action of exhaust gases
[名词解释]General purpose registers
[单项选择]Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
A. double bottom fuel oil tank temperature
B. heater supply steam flow
C. pressure of the fuel supplied to the burners
D. attemperator steam flow in the heater discharge circuit
[单项选择]Thermostatic expansion valves can be adjusted for （）.
A. suction pressure only
B. head pressure only
C. superheat only
D. suction pressure and box temperature
