試題詳解

55. Which of the following statement about “gears” is incorrect？
(A)The mixer uses a gear mechanism to transmit power.
(B)Gears can be used to change the direction and the speed of movement.
(C)If the input gear is smaller than the output gear, the speed will increase.
(D)The racks and gears mechanism can be used to change the rotary motion to linear motion.