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37. Which of the following are the characteristics of wheel and axle?
1. It has two parts.
II. It is a simple machine
III. It helps us in many ways.
IV. When the wheel turns, the axle does not turn.
A. I & II
C. I, II, III
B. I & III
D. I, II & IV

38. The Grade 6 pupils need to cut materials to make a wooden table as their project in TLE. Which of the following will they use?
A. saw
C. can opener
B. small knife
D. wheelbarrow

39. A cargo ship will unload big boxes at the pier. Which of these machines will the men use?
A. screw
C. fixed pulley
B. lever
D. block and tacked pulley

40. How is wheel and axle different from other simple machine?
A. It consists of a large wheel and a smaller wheel.
B. It consists of a rope that passes over a grooved wheel.
C. It consists of an inclined plane coiled around a pole.
D. It consists of two inclined plane put back to back to form sharp edge.

41. What will you use to transfer a heavy load to a higher place?
A. lever and wedge
C. inclined plane and pulley
B. screw and wedge
D. screw and wheel and axle​