GAT Subject
Engineering
Computer Science Civil Engineering Chemical Engineering Agricultural Engineering Mechanical Engineering Electronics and Communication
5. | If a machine is lubricated with oil? | |
A. | The mechanical advantage of the machine increases | |
B. | The mechanical efficiency of the machine increases | |
C. | Both its mechanical advantage and efficiency increases | |
D. | Its efficiency increases, but its mechanical advantage decreases | |
Answer: Option B | |
Explanation: | |
When a machine is lubricated with oil, energy wastage against friction decreases. This increases the mechanical efficiency of the machine. |
|
Tutorial Link: |