https://engineers.academy/product-category/level-3-courses/level-3-national-diploma-nd-courses/ Level 3 Engineering Principles - Prerequisites Info Sheet

1. LEVEL 3 ENGINEERING PRINCIPLES - PREREQUISITES INFORMATION
Metric Prefixes
PREFIX VALUE STANDARD FORM SYMBOL
Tera 1,000,000,000,000 1x1012 T
Giga 1,000,000,000 1x109 G
Mega 1,000,000 1x106 M
Kilo 1000 1x103 K
- 1 1 -
Milli 0.001 1x10-3 m
Micro 0.000 001 1x10-6 μ [Mu]
Nano 0.000 000 001 1x10-9 n
Pico 0.000 000 000 001 1x10-12 p
Engineering Examples:
1. 150 MPa = 150,000,000 Pa
2. 1,550 W = 1.55 KW
3. 0.000 020 F = 20 μF
4. 22,450 mm = 22.45 m

2. Rearranging and Solving Equations
Fundamental
Principles
1. ALL EQUATIONS have a left-hand side and a right-hand side,
separated by an equals sign
2. Equations must remain balanced (the left-hand side MUST
ALWAYS equal the right-hand side)
3. Any operation that is performed on the left-hand side of an
equation MUST be performed on the right-hand side of the
equation for it to remain balanced
4. To rearrange an equation for a given variable, ‘strip away’ all
other numbers, terms and expressions, leaving the variable on its
own (note: this can only be done by using the allowable
operations below)
Allowable
Operations
(Rules)
1. You can add a number, term or expression to both sides of an
equation
2. You can subtract a number, term or expression from both sides of
an equation
3. You can multiply each side of the equation by the same number,
term or expression
4. You can divide each side of the equation by the same number,
term or expression
5. You can raise or lower each side of the equation by a given power
(i.e. square / cube each side, or square root / cube root each side)
6. You can take reciprocals of both sides of the equation
Note: there are a number of additional rules which will be covered in
later topics. These are just the basics that are required to get started