The moment of inertia would remain unchanged
The moment of inertia would be 1/4 its original value
The moment of inertia would be 1/2 the original value
None of the above
第1题：
Because the circulating water is in a closed loop,_______is installed to cater for expansion and contraction of the water at different conditions of operation.
A.an expansion joint
B.a drain tank
C.a head tank
D.a contraction tank
第2题：
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
第3题：
What is head tank in the closed cooling water system used for?
A.for the release of air from the cooling water
B.providing expansion room for heated cooling water
C.a place for implementing water and water treatment agent
D.all of the above
第4题：
我国安全电压的等级系列为（）伏。
第5题：
The use of portable electrical equipment in the pumproom on tank barges is prohibited unless ______．
A.The pumproom is gas-free
B.Spaces with bulkheads common to the pumproom are either gas-free，inert，filled with water，or contain grade E liquid
C.All other compartments in which flammable vapors and gases may exist are closed and secured
D.All of the above
第6题：
_____ allows for expansion and water make up in the water cooling system.
A.A top tank
B.A head tank
C.A head valve
D.A drain tank
第7题：
If you are bunkering and you close off one tank in the line of tanks being filled，the rate of flow to other open tanks on the same line will ______．
A.increase
B.decrease
C.stop
D.remain constant
第8题：
Tomas plans to construct a circular fishpond with a diameter of 9 ft. Which of the following is closest to the length, in feet, of the decorative fencing that Tomas needs to enclose the fishpond along its perimeter?
A.15
B.19
C.29
D.64
E.255
第9题：
Is this a （）(淡水) tank?
第10题：
换料水（贮存）箱 refueling water (storage) tank