更多"When distilling salt water the cool"的相关试题:
[单项选择]When distilling sea water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.
A. to decrease scale formation
B. for better cooling effect
C. for more economical purpose
D. to raise vacuum
[单项选择]If in doubt as to the true water level when a boiler is being oil-fired, you should （）.
A. take no measures
B. extinguish the fire as soon as possible
C. feed water to the boiler
D. open the blow down valve
[单项选择]Drinking salt water will （）
A. be safe if mixed with fresh water
B. prevent seasickness
C. promote urine excretion
D. protect against heat cramps
[单项选择]A centrifugal pump may fail to deliver water when first started if the （）.
A. water seal pipe is plugged
B. pump is not primed
C. seal ring is improperly located
D. impeller is flooded
[单项选择]If you have to jump in the water when abandoning a vessel，your legs should be（）.
A. spread apart as far as possible
B. held as tightly against your chest as possible
C. in a kneeling position
D. extended straight down and crossed at the ankles
[单项选择]For the deepest water when rounding a bend in a river，you should navigate your vessel（）.
A. toward the inside of the bend
B. toward the outside of the bend
C. toward the center of the river just before the bend，then change course for the river's center after the bend
D. in the river's center
[单项选择]The vacuum maintained in the salt water feed heater shell of a flash-type evaporator is generally accomplished by （）.
A. a separate air ejector unit
B. a direct unimpeded connection between second stage and salt water feed heater
C. either by vacuum drag or an external line from the first stage via a fixed orifice
D. the fixed orifice provided in the steam supply line
[单项选择]What does salt water draft mean?（）.
A. It means summer draft
B. It means maximum draft
C. It means fresh water draft
D. It means seawater draft
[单项选择]What DOCS SALT WATER DRAFT means?（）.
A. It means summer draft
B. It means Maximum draft
C. It means Fresh Water draft
D. It means Seawater Draft
[单项选择]When discharging bilge water, which criteria must be observed?（）
A. The requirement for the oil content of bilge water discharged is 15 ppm
B. No discharge in sensitive waters
C. Any discharge in sensitive waters
D. International, national or local requirements have to be observed
[单项选择]When oil is accidentally discharged into the water，what should you do after reporting the discharge（）.
A. Contain the oil and remove as much of it as possible from the water
B. Throw chemical agents on the water to disperse the oil
C. Throw sand on the water to sink the oil
D. Obtain your permit from the Corps of Engineers
[单项选择]Most pump manufacturers recommended that the discharge piping for centrifugal pumps be （）.
A. one size larger than the pump discharge nozzle
B. the same size as the pump discharge nozzle
C. one size smaller than the pump discharge nozzle
D. installed with a short radius elbow at the pump
[单项选择]When the water produced from most evaporator is supplied for drinking purpose, it must be treated to ensure it is biologically pure and （）.
A. slightly acidic
B. slightly alkaline
C. no salty
D. slightly bitter
[单项选择]When oily water separator is operating, which measure （） is wrong.
A. pay attention to operating parameters
B. renew and clean separating units in time
C. check oil level in separator to prevent overload
D. check separating effect, if it is bad, flush with large capacity water pump
[单项选择]If you wear extra clothing when entering the water after abandoning ship it will（）.
A. weigh you down
B. preserve body heat
C. reduce your body heat
D. make it more difficult to breathe
[单项选择]When collecting condensation for drinking water，（）.
A. a sponge used to mop up and store condensation must be kept salt free
B. only condensation on the bottom of the canopy should be collected
C. it should be strained through a finely woven cloth
D. chlorine tablets should be used to make it drinkable
[单项选择]When preparing an engine for water temperature（）
A. should be kept at a proper level by a cooler
B. should be raised to about 80℃ by a heater
C. should be raised gradually
D. should be lowered to about 60℃
