Chapter 10: Mechanical Engineering | Test Your Knowledge
What two types of systems are designed, built, and maintained by mechanical engineers?
The push or pull on an object resulting from contact with another object is _____.
_____ is the application of force to move an object a distance.
The rate at which work is performed is _____.
Describe the difference between potential and kinetic energy.
Give the definition for each of the following types of motion.
A(n) _____ is a simple machine that uses a stiff bar rested on a fulcrum, or pivot, to lift or move a load.
A(n) _____ is a simple machine that gains mechanical advantage by moving the object a longer distance while using less force.
True or False?
Mechanical power systems use components such as gears, pulleys, and belts to transmit power.
_____ systems use liquid to transmit power, while _____ systems use air.
What are the two most common power sources in fluid power systems?
_____ are devices that mesh with similar devices to transmit power.
In a mechanical power system, a(n) _____ is a cylindrical piece used to transfer rotary motion.
A forklift raises a 400-lb stack of shingles 12′ in the air. How much work has been done?
Calculate how much force would be generated in a fluid power cylinder with an area of 0.5 in
operating at 120 psi.
Calculate the horsepower provided by the forklift, if the shingles in Question 14 are raised in 3 minutes.
Determine the gear ratio of a gear set in which the driver gear has 60 teeth and the driven gear has 15 teeth.
Calculate the ideal mechanical advantage that is provided by the following simple machine: One end of a 15′ ramp is placed on the ground and the other is placed on a loading dock that is 3′ above the ground. How much effort would be required to push a 150-lb box up the ramp?
Determine the efficiency of the previous machine, if it required 34 lb to push the 150-lb box up the ramp.
Give at least two applications of mechanical power.
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