Page 406 - GMAT 2017b_Neatb

Mechanical Comprehension Test 2

127. If the rope on the end of this pulley system is pulled with 131. The tires of a car are filled in a garage to a pressure of
160 pounds of force, what is the maximum weight that 35 pounds per square inch. Driving the car to a hot
can be lifted? desert will have what effect on the tires?
(A) 640 pounds (A) Their pressure will increase.
(B) 480 pounds (B) Their pressure will decrease.
(C) 320 pounds (C) Their weight will increase.
(D) 80 pounds (D) Their weight will decrease.

A B C
132. A crane raises its arm using a powerful cable attached
Water to the main body. Which cable position offers the
greatest mechanical advantage?
(A) A
Mercury (B) B
(C) C
(D) They all offer the same advantage

128.A beaker is filled with mercury and water. Mercury
3
is a liquid with a density of 8g/cm and water has a
3 3
density of 1g/cm . If a penny with a density of 5g/cm is
dropped into the beaker, where will it settle?
(A) at the bottom of the beaker
(B) in the middle of the mercury layer
(C) in between the mercury and water layers Scale 2
(D) on top of the water layer Scale 1
133.Two scales are connected by a plank weighing 2
pounds. A 12-pound block is placed directly in
between the two scales. How many pounds will scale 1
20 feet read?
(A) 7 pounds
(B) 10 pounds
(C) 12 pounds
5 feet 240 pounds (D) 14 pounds

129. A 240-pound block is being pulled up an incline by a
pulley. The incline is 20 feet long and rises 5 feet.
Neglecting friction, how much force is necessary to
move the block up the incline?
(A) 60 pounds
(B) 100 pounds
(C) 260 pounds
(D) 240 pounds

130. A jack is able to lift a 3,000-pound car using only 50
pounds of force. What is the mechanical advantage of 134.A force of 9 pounds stretches a spring 3 inches. How
the jack? far will the spring move under 12 pounds of force?
(A) 4 (B) 60 (A) 3 inches (B) 4 inches
(C) 600 (D) 2,950 (C) 6 inches (D) 36 inches

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