A gear with 30 teeth turns at 200 revolutions per minute and drives a gear with 10 teeth. At what speed does the second gear turn?
Answer and explanation
Correct answer: D. 600 rpm
- Step 1: The speeds are inversely proportional to the numbers of teeth. Step 2. 200 x 30 / 10 = 600 rpm. Answer: 600 rpm. Why not the others: 67 rpm: the ratio of the teeth was inverted. 220 rpm: the numbers were added and subtracted. 720 rpm: this value comes from a slip in the arithmetic.
Practise more Technical Understanding.
Free questions with an explanation for every one, and full timed Ausbildung Aptitude Test (Einstellungstest) mock tests.
More Technical Understanding questions
- A lever has a pivot. A force of 50 N acts 2 m from the pivot. The load is 0.5 m from the pivot on the other side. What load balances the lev…
- Gear A has 20 teeth and drives gear B with 40 teeth. When A makes 10 turns, how many turns does B make?
- Two resistors of 6 ohms are connected in series. What is the total resistance?
- Two resistors of 6 ohms are connected in parallel. What is the total resistance?
- A motor runs on 230 V and draws 2 A. What is its power?
- In a hydraulic press, the small piston has an area of 2 square cm and the large piston has 20 square cm. A force of 50 N acts on the small p…