2301 Applied Math
On the Celsius (C) scale 0°C is
the freezing point of pure water
What is a decimal of a foot?
A decimal fraction where the denominator is either 12 or a power of 12
When two parallel rect-angles, squares, or right triangles are connected by rectangles, the space is called
A prism
What is applied math?
Any mathematical process used to accomplish a task.
Underground pipes that are at risk of freezing are installed
Below the frost line
A units are the __________ and F units are the ________
Smallest, largest
When determining volume, it is also important to consider
Weight
Square
a type of rectangle in which all four sides are the same length
Fitting books, also called
dimensional catalogs, provide the dimensions and weights of pipe bundles
What is area?
The measurement of a flat surface
Equilibrium
a condition in which the temperature is the same throughout the object or space
Volume
a measure of capacity, the amount of | space within something
Temperature
a measure of the heat of an object according to a scale
Cube
a rectangular prism where the length, width, and height are all the same
A right triangle
a three-sided figure that has an internal angle that equals 90 degrees
An isosceles triangle is
a type of triangle that has two sides of equal length
Iwo of the most important forms of pressure in plumbing are
air pressure and water pressure.
Thermal expansion occurs in
all the dimensions of an object: length, width, and height
Rectangular prisms
are three-dimensional spaces / where rectangles make up the sides, top, and bottom
When calculating the area of a surface that is not a simple rectangle or right triangle you should?
break the floor plan into smaller areas shaped like rectangles and right triangles
When working with systems of measurement, I you may be required to
convert decimals to fractions
If a crane attempts to pick up a load that is heavier or lighter than planned, what would happen?
crane could topple or the load could swing uncontrollably, causing damage to materials and equipment, and injury or even death.
In the English system, space is measured in
cubic feet
To convert measurements in cubic inches to gal-lons, you should?
divide the cubic-inch measurement by 231
On the Fahrenheit (F) scale, 32°F
is the freezing point of pure water at sea level.
The Celsius scale is a centigrade scale because
it is divided into 100 degrees
What is the metric system?
A system of measurement in which multiples and fractions of the basic units of measure are expressed as powers of 10.
Bimetallic thermometers
A thermometer that determines temperature by using the thermal expansion of a coil of metal consisting of two thin strips of metal bonded together
infrared thermometers
A thermometer that measures temperature by detecting the thermal radiation emitted by an object
Liquid thermometers
A thermometer that measures temperature through the expansion of a fluid, such as mercury or alcohol
Arresters are rated from
A to F by size and shock absorption capability
In the metric system, the measure of space is
Cubic meters
In the metric systemares wreasured in
Square meters
Thermal expansion
The expansion of materials in all three dimensions when heated
Conduction
The flow of heat energy from a hotter object to a cooler one
Area is measured using two dimensions:
length and width.
Volume is measured using three dimensions:
length, width, and height.
To convert a measurement into its equivalent in the other system you must?
multiply the measurement by the number, called the conversion factor, in the far right column
Thermometers display temperatures using
the Fahrenheit scale, the Celsius scale, the Kelvin scale, or sometimes all three
The metric system is also called
the Système International d'Unités (SI), or International System of Units.
How many basic units of measurement are in the modern metric system?
7
In the English system, area is expressed in?
Square feet
How many gallons are in 1 cubic foot?
7.48
One gallon of water weighs
8.33 pounds
Air at sea level (an altitude of zero feet) creates
14.7 pounds of pressure per square inch of surface area
Pi is equal to
3.416
Where and when was the metric system developed?
France in the 18th century
The weight of a volume of waste water may be greater than that of
Fresh water
In the English system, the measure of liquid is
Gallons
Materials expand when they are ___________ and contract when they _______.
Heated, Cool
What happens when a liquid or gas is compressed?
It exerts more pressure on its container
In the metric system, the measure of liquid is in
Liters
What are the two ways to measure psi?
Pounds per square inch absolute (psia) and Founds per square inch gauge (psig)
In the English system of measurement, pressure is measured in
Pounds per square inch(psi)
The system of weights and measures currently used in the US is called
The English system
What is the basic system of temperature measurement in the metric system?
The Kelvin scale
What country mostly uses the English system?
The US
On the Celsius (C) scale 100°C is
The boiling point
Electrical thermometers (sOmetimes called digital thermometers) convert
electrical resistance or voltages generated by heat into a temperature reading.
Absolute pressure is equal to
gauge pressure plus the atmospheric pressure
The boiling point of pure water at sea level on the on the Fahrenheit (F) scale is
is 212°F.
Pressure is
the force created by a liquid or gas inside a container
The rate of thermal expansion of pipe depends on
the temperature of the pipe and the type of material the pipe is made from
Why do plumbers need to be able to calculate the volume and weight of water heaters?
to ensure that there is enough room when installing them, and that the floor can support the weight
Thermometers
tools that measure temperature
How do you calculate the weight of a full water heater?
you will need to know both the weight of the water in the tank and the weight of the water heater itself
