Page 397 - GMAT 2017b_Neatb

Mechanical Comprehension Test 2

68. A block is held in place on a ramp by friction. Which
arrow shows the direction of the frictional force?
(A) A
(B) B
(C) C
(D) D
65. The shock absorber on a car is a very large spring. If a
car hits a pothole with 500 pounds of force and the 69. If the following items are placed into a hot oven, which
shock absorber compresses 2.5 inches, what is its force will warm most quickly?
constant? (A) a metal fork
(A) 200 pounds per inch (B) a plastic spoon
(B) 300 pounds per inch (C) a ceramic mug
(C) 350 pounds per inch (D) a glass bowl
(D) 400 pounds per inch
4

3
5 B
1
A
2
66. A cracked pipe, marked in the figure by an ´, has caused
all valves to automatically close. Which valves can be
opened to allow water to flow from tank A and B while
avoiding the broken section?
(A) 1 and 3 70. Using the pulley system shown in the figure, how
(B) 1 and 4 much force is required to lift a 300-pound weight?
(C) 1, 2, and 5 (A) 75 pounds
(D) 1, 3, and 5 (B) 100 pounds
(C) 150 pounds
(D) 300 pounds

71. A screw can be thought of as a special type of what
simple machine?
(A) the lever
(B) the inclined plane
(C) the pulley
(D) the wheel and axle
pivot point
57 pounds 76 pounds
67. A single-speed bicycle has a front gear with 48 teeth and
a rear gear with 12 teeth. If the bicycle is pedaled at 90
rpm, how fast will the rear wheel rotate?
(A) 90 rpm
(B) 180 rpm
(C) 270 rpm
(D) 360 rpm 6 feet x feet

D A 72. In the diagram, Steven wants to balance two blocks on
either side of a lever. One block weighs 57 pounds and
the other weighs 76 pounds. If the 57-pound block is 6
B feet to the left of the pivot point, how far to the right of
the pivot point should the 76-pound block be placed?
C (A) 4.5 feet (B) 6 feet
(C) 19 feet (D) 4 feet

400