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30 Cards in this Set
- Front
- Back
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What formula is used to find the area of a circle? |
Area = 0 .7854 × diameter square |
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What formula is used to find the area of a rectangle? |
Area = length × width |
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What formula is used to find the area of a cylinder? |
Volume = 0.7854 × diameter square × height |
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What formula is used to find the volume of a rectangular solid? |
Volume = length × width × height |
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What formula is used to find the area of a triangle? |
Area=base × height ÷ 2 |
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What is the significance of the constant pi? |
Pi is the ratio of the circumference to the diameter of any circle |
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What is the value of the constant pi? |
3.1416 |
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What is meant by the root of a number? |
One or more equal numbers that when multiplied together will produce the number |
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What is the 8th power of 2? |
256 |
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What is the square root of 4,096? |
64 |
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What is meant by a negative number? |
A number less than zero usually represented by a minus sign preceeding the number |
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What is meant by ratio and how is the ratio expressed? |
A fraction that compares one number to another for example 6 is to 2 is a ratio or 1:3 |
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What is meant by matter? |
Anything that occupies space and has weight |
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What are the three physical States in which matter can exist? |
Solid, liquid or gas. |
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What is meant by pressure? |
A force that acts on a unit area |
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What is the standard sea level atmospheric pressure expressed in inches of mercury and in pounds per square inch? |
29.92 hg or 14.69 lbs per square inch |
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What characteristic of the atmosphere determines the speed of sound? |
Temperature |
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What is meant by the density of air? |
The weight of a given volume of air |
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How much force is produced by a 1000 PSI of hydraulic pressure acting on a Pistons whose area is 20 square inch? |
1000psi ×20sq-in = 20,000 pounds |
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What is meant by the fulcrum of a lever? |
The point about which the lever rotates |
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Give an example of a first class lever, second class lever and a third class lever? |
An example of a first class lever seesaw, a second class lever is a wheelbarrow, third class lever is a retractable landing gear |
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How many cubic inches of fluid is forced out of a cylinder by a piston whose area is 20 square inches when the Piston moves 5 in? |
5×20=100 cubic inches |
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What is meant by a temperature of absolute zero? |
The temperature at which all molecular movement stops. |
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What is the celsius equivalent of a temperature 50° Fahrenheit? |
10 degree centigrade |
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What is the formula used to find the amount of work done when an object is moved across the floor? |
Work = force × distance |
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What determines the mechanical advantage of an arrangement of ropes and pulleys? |
The number of ropes that support the weight |
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What determines the mechanical advantage of a gear train? |
The ratio of the number of teeth on the drive gear and the driven gear |
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What will happen to the pressure of a confined gas if the temperature of the gas is increased? |
The pressure will increase |
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What are three methods of heat transfer? |
Conduction, convection and radiation |
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What is meant by the absolute humidity of the atmosphere? |
The actual amount of water that it is present in a given volume of air |
