Question

nccer 00104 - introduction to power tools 58min what do pneumatic tools run on? manual pumping action compressed air vaporized gas fluid pressure

Explanation:

Pneumatic tools operate using compressed air. Compressed - air is stored energy that can be used to drive the mechanical components of the tool. Manual pumping action is not the typical power source for pneumatic tools. Vaporized gas is not relevant here, and while fluid pressure can power hydraulic tools, pneumatic tools specifically rely on compressed air.

Answer:

B. compressed air