What can pumps be driven by?
A) Air
B) Electric motors
C) Steam turbines
D) All of the above
Answer: D
Explanation: A) Incorrect. Pumps can be driven by electric motors, steam turbines, and in some services, by air.
B) Incorrect. Pumps can be driven by electric motors, steam turbines, and in some services, by air.
C) Incorrect. Pumps can be driven by electric motors, steam turbines, and in some services, by air.
D) Correct. Pumps can be driven by electric motors, steam turbines, and in some services, by air.
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