_____ are required to prevent oil from spreading beyond the confines of a heater in the event of a ruptured tube.

_____ are required to prevent oil from spreading beyond the confines of a heater in the event of a ruptured tube.

_____ are required to prevent oil from spreading beyond the confines of a heater in the event of a ruptured tube.



a. Moats
b. Dikes
c. Tunnels
d. Rails
e. By-pass pipes





Answer: B


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