QUESTIONS WITH CORRECT ANSWERS
ALREADY PASSED
◉ A ball is attached to one end of a rod AB, and the other end is attached
to a vertical rotating axle as shown. The joint at B contains a pin so that
the ball can move up and down. If the axle BC rotates faster, angle x will
A: increase
B: decrease
C: not change
D: become 90 degrees. Answer: B
◉ The spring pulls the left end of the lever against the cam. As the cam
makes four rotations, how many times will the right end of the lever
move up and down?
A: 2
B: 4
C: 6
D: 8. Answer: B
, ◉ In this pulley system, what force must be applied to balance the 10
pound weight?
A: 5 pounds
B: 10 pounds
C: 15 pounds
D: 20 pounds. Answer: A
◉ The surface area of piston A is 2 square inches, while the surface area
of piston B is 4 square inches. If piston A is pushed down 6 inches, how
far will piston B move up?
A: 3 inches
B: 4 inches
C: 6 inches
D: 12 inches. Answer: A
◉ If 60 lbs. of force must be applied to the valve for it to open, how
much upward force must push rod X apply for the valve to open?
A: 60 lbs
B: 40 lbs