更多"When collecting condensation for dr"的相关试题:
[单项选择]Seawater may be used for drinking water ().
A. at a maximum rate of two ounces per day
B. after mixing with an equal quantity of fresh water
C. if gather during or immediately after a hard rain
D. under no circumstance
[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]When distilling salt water the cooling water discharging from the distiller is fed back to evaporator as feed water ().
A. to cut down the amount of cooling water needed
B. to prevent an excess amount of cooling water from being discharged to the bilges
C. to supply hot water to the evaporator for more economical operation
D. None of the above is tree
[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]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]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 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℃
[单项选择]When started, a complete oily water separating unit is first filled ()The oily water mixture is then pumped through the inlet pipe into the coarse separating compartment.
A. with dirty water
B. with clean water
C. by oily water
D. by mixed water
[单项选择]When the dock is refilled with water after docking repair, the first work which should be done by engineers is ()
A. igniting boiler
B. releasing air in sea water system
C. starting generator
D. cut off shore power
[单项选择]When abandoning ship and jumping into the water from a substantial height without a life jacket,you should().
A. dive head first,using your hands to break the surface of the water
B. hold your arms firmly at your sides and jump feet first
C. jump feet first,covering your nose and mouth with one hand and grasping the opposing upper arm with the other
D. jump feet first,holding your knees to your chest