Page 389 - GMAT 2017b_Neatb

Mechanical Comprehension Test 2

9. Pulley B has twice the circumference of pulley A. If
pulley A rotates at 20 revolutions per minute (rpm),
how fast must pulley B rotate?
(A) 10 rpm
(B) 20 rpm
(C) 40 rpm
(D) 200 rpm

6. The arm of a crane is 16 feet long, and the cable used to
lift the arm is attached 10 feet from the crane body. For
the crane to lift an object weighing 600 pounds, how
much force must be applied by the cable?
(A) 160 pounds
(B) 600 pounds
(C) 960 pounds
(D) 1,600 pounds

10. A spring has a force constant of 2.5 pounds per inch.
24 feet
How much force is required to move the spring 10
inches?
(A) 4 pounds
(B) 12.5 pounds
500 pounds (C) 25 pounds
6 feet (D) 50 pounds

11. Styrofoam cups do well at keeping coffee warm
because they
7. A 500-pound block is being pulled up an incline by a (A) are good insulators
pulley. The incline is 24 feet long and rises 6 feet. (B) are poor insulators
Neglecting friction, how much force is necessary to (C) absorb light and convert it to heat
move the block up the incline? (D) transfer heat from your hand to the coffee.
(A) 125 pounds
(B) 500 pounds 12. A screw has 20 threads per inch. How many full turns
(C) 144 pounds of the nut are required for the nut to travel 1.5 inches?
(D) 476 pounds (A) 15 turns
(B) 20 turns
8. Jill leaves her house in a car and travels north at 40 mph.
(C) 25 turns
Alex leaves from the same place one hour later and
(D) 30 turns
follows the same route at 60 mph. How long will Alex
have to drive before he overtakes Jill? 13. When oil and water are mixed together, the oil forms a
(A) 40 minutes layer at the top, and the water sinks to the bottom
(B) 1 hour because
(C) 2 hours (A) oil is less dense than water
(D) 3 hours (B) oil is denser than water
(C) oil is more acidic than water
(D) oil is less acidic than water

A B

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