更多"Expansion tank should be used to re"的相关试题:
[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]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]Vents are led from the engine to head tank （） from the cooling water.
A. for the release of air
B. for the release of water
C. in order to the release of air
D. because the release of air
[单项选择]Functions aboard a tanker or tank barge such as connecting，disconnecting，and topping off must be supervised by（）.
A. any certificated tankerman
B. the Master of the vessel
C. the officer of the watch
D. the person designated as person in charge
[单项选择]If diesel oil in this tank is used, the （） of the oil must not exceed 120 degree F.
A. viscosity
B. flash point
C. acid value
D. temperature
[单项选择]Which command can be used from a PC to verify the connectivity between hosts that connect through a switch in the same LAN?（）
A. ping address
B. tracert address
C. traceroute address
D. arp address
[单项选择]To lubricate the swivel or remove corrosion from a fire hose coupling，you should use（）.
A. glycerine
B. graphite
C. kerosene
D. fresh water and soap
[单项选择]Before being used the fuel service tank should be drained of （）.
A. soda solution
B. mechanical impurities
C. ballast
D. water and residuals
[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]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]It（）exactly thirty years since I graduated from college.
A. was
B. has been
C. was be
D. had been
[单项选择]A lube oil filter can be used to remove most contaminants from lube oilA contaminant which will remain in the lube oil after filtering is （）.
A. acid
B. fuel oil
C. sediment
D. water
[单项选择]What is used to test a tank for oxygen content?（）
A. Combustible gas indicator
B. Vapor indicator
C. Atmosphere analyzer kit
D. None of the above
[单项选择]For the purpose of（）tank or hold washings from any vessel，an application shall be made to Harbor Authorities for approval.
A. discharging
B. recircling
C. loading
D. taking in
