Mechanical Comprehension Practice
Test 2 Questions Fully Solved.
A cannon fires off a ship up towards a mountain range. Neglecting air resistance, where will the
velocity of the projectile be
greatest? - Answer *a. Exiting the muzzle*
b. Halfway to the mountains
c. As it impacts the mountains.
If Gear A is traveling at 10 rpm, how many times will Gear C rotate in 3 minutes? (same number
of teeth) - Answer a. 1.7 times
b. 3 times
*c. 30 times*
(10rpm x 3)
The larger piston has four times as much horizontal area as the smaller piston. If the small
piston is compressed 8 inches, how far will the larger piston move? - Answer a. 8 inches
*b. 2 inches*
c. 32 inches
(8/4)
River water enters a section where the water spreads out into a wide, deep area. Is the water
likely to speed up, slow down, or remain at a constant speed? - Answer a. speed up
*b. slow down*
c. remain at a constant speed
A magnet is placed in the middle of two identical, anchored magnets. Which direction will the
magnet go? - Answer a. towards magnet 1
b. towards magnet 2
*c. the magnet won't move*
A solid substance melts at -21°C. If the object is known to change phase at 81°C, will the object
be a solid, liquid, or gas at 90°C? - Answer a. solid
, b. liquid
*c. gas*
A pendulum swings back and forth once per second. The pendulum is shortened by removing
half of the string. The new frequency is 1.4 Hz (Hz=1/sec). How often will the pendulum swing
back and forth in a minute? - Answer *a. 84*
b. 92
c. 72
(1.4 x 1min x 60sec)
Two identical pistons are connected by a pipe. What is the mechanical advantage of the piston
system? - Answer a. 0.5
*b. 1*
c. 2
(2/1)
A ball is thrown horizontally off a cliff at the same time that an identical ball is dropped off a
cliff. How long after the dropped ball hits the ground will the thrown ball hit? - Answer a.
approximately 1 second after
b. approximately 2 seconds after
*c. they will hit at the same time*
The cam rotates at 5 rpm. How many times will the follower (needle) move up and down in a
minute? - Answer *a. 20*
b. 72
c. 140
(5rpm x 4 bumps)
Which of the following are *not* ways to increase the torque applied to a wrench? - Answer
a. increase the length from the center to the
applied force
b. increase the force
Test 2 Questions Fully Solved.
A cannon fires off a ship up towards a mountain range. Neglecting air resistance, where will the
velocity of the projectile be
greatest? - Answer *a. Exiting the muzzle*
b. Halfway to the mountains
c. As it impacts the mountains.
If Gear A is traveling at 10 rpm, how many times will Gear C rotate in 3 minutes? (same number
of teeth) - Answer a. 1.7 times
b. 3 times
*c. 30 times*
(10rpm x 3)
The larger piston has four times as much horizontal area as the smaller piston. If the small
piston is compressed 8 inches, how far will the larger piston move? - Answer a. 8 inches
*b. 2 inches*
c. 32 inches
(8/4)
River water enters a section where the water spreads out into a wide, deep area. Is the water
likely to speed up, slow down, or remain at a constant speed? - Answer a. speed up
*b. slow down*
c. remain at a constant speed
A magnet is placed in the middle of two identical, anchored magnets. Which direction will the
magnet go? - Answer a. towards magnet 1
b. towards magnet 2
*c. the magnet won't move*
A solid substance melts at -21°C. If the object is known to change phase at 81°C, will the object
be a solid, liquid, or gas at 90°C? - Answer a. solid
, b. liquid
*c. gas*
A pendulum swings back and forth once per second. The pendulum is shortened by removing
half of the string. The new frequency is 1.4 Hz (Hz=1/sec). How often will the pendulum swing
back and forth in a minute? - Answer *a. 84*
b. 92
c. 72
(1.4 x 1min x 60sec)
Two identical pistons are connected by a pipe. What is the mechanical advantage of the piston
system? - Answer a. 0.5
*b. 1*
c. 2
(2/1)
A ball is thrown horizontally off a cliff at the same time that an identical ball is dropped off a
cliff. How long after the dropped ball hits the ground will the thrown ball hit? - Answer a.
approximately 1 second after
b. approximately 2 seconds after
*c. they will hit at the same time*
The cam rotates at 5 rpm. How many times will the follower (needle) move up and down in a
minute? - Answer *a. 20*
b. 72
c. 140
(5rpm x 4 bumps)
Which of the following are *not* ways to increase the torque applied to a wrench? - Answer
a. increase the length from the center to the
applied force
b. increase the force
