Mechanical Comprehension
15 Questions
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Questions and Answers
- 1.A valve is used to perform which of the following functions?
- A.
Increase the temperature of a gas
- B.
Aid evaporation of a liquid
- C.
Control the flow of a liquid
- D.
Decrease the density of a gas
- 2.Which term below describes the opposite of an increase in speed?
- A.
Velocity
- B.
Deceleration
- C.
Acceleration
- D.
Rotation
- 3.Which principle of mechanical motion is used in the design of a roller coaster?
- A.
Momentum
- B.
Friction
- C.
Acceleration
- D.
All of the above
- 4.A block of steel has a density of 0.29 pounds per cubic inch. If the block has dimensions of 1 inch by 1 inch by 3 inches, what is the weight?
- A.
0.29 pounds
- B.
0.36 pounds
- C.
0.87 pounds
- D.
0.99 pounds
- 5.Which mechanical components are typically used between a wheel and an axle to reduce friction?
- A.
Springs
- B.
Bearings
- C.
Hinges
- D.
Levers
- 6.
- A.
Lift objects
- B.
Cut metals
- C.
Cut wood
- D.
Crunch metal
- 7.
- A.
Pulley
- B.
Hoist
- C.
Wheel and axle
- D.
Lever
- 8.
- A.
Contract
- B.
Expand
- C.
Bend
- D.
Harden
- 9.If a train moves at 70 MPH and travels for 90 minutes, how many miles does it travel?
- A.
105 miles
- B.
105 miles
- C.
109 miles
- D.
630 miles
- 10.Water is flowing into a tank through pipe A at 6 gallons per minute and through pipe B at 7 gallons per minute. The water is flowing out of the tank through pipe C at 8 gallons per minute. How much more water will be in the tank at the end of 5 minutes.
- A.
15 gallons
- B.
25 gallons
- C.
32 gallons
- D.
50 gallons
- 11.To lift a 600 pound piano, Tom and Jerry decide to use a plank placed under one end of the piano. The plank is 3 feet long. If a fulcrum is placed under the plank, one foot away from the piano, how much force must be applied to the plank to lift the piano?
- A.
100 pounds
- B.
125 pounds
- C.
140 pounds
- D.
150 pounds
- 12.A garden hose is used to siphon the water out of an above-ground swimming pool. What makes the water flow out of the pool and through the garden hose?
- A.
Weight of the water
- B.
Water pressure
- C.
Air pressure
- D.
Air and water pressure in combination
- 13.Which action describes a clock pendulum swaying back and forth?
- A.
Gravity
- B.
Periodic motion
- C.
Acceleration
- D.
Velocity
- 14.A wrench is used to turn a bolt that has 20 threads per inch. After 15 complete turns of the wrench, the bolt will have moved:
- A.
1/8 inch
- B.
1/4 inch
- C.
3/4 inch
- D.
2/3 inch
- 15.Water is flowing into a tank at the rate of 180 gallons per minute. However, the tank has a leak, and water is leaking out at the rate of 2 gallons per second. How long will it take to add 120 gallons?
- A.
1 minute
- B.
2 minutes
- C.
3 minutes
- D.
4 minutes
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