Basic Math Self Assesment

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Basic Math Self-Assessment

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Overview of Ohm's Law \| Basic Math Self Assessment

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The Cathodic Protection Tester and Technician courses involve the use of basic mathematics skills including addition, subtraction, division, fractions, algebra, balancing equations, conversions of units, percentages, and graphs. This test was developed to help Cathodic Protection Tester and Technician course students assess their skill in the mathematical concepts utilized in these courses.

The questions should be solved without the use of a calculator.

Solve the following questions. Write your answer in the space provided.

1. Write the answer in exponential form. (8 x 8 x 8) = _____

2. Solve. 3² • 3³

3. Solve the following.

1⁴⁷ =_____
2² =_____
7³ =_____

4. Write each fraction in decimal format.

	81
a.		=	________
	100

	3
b.		=	________
	10

	37
c.		=	________
	50

5. Write each decimal as a fraction.

0.4 = _____
0.1 = _____

6. Solve for each of the given fraction problems. Reduce fraction to lowest
terms.

	15		50
a.		+		=	______
	10		50

	35		21
b.		+		=	______
	110		12

	36		20
c.		-		=	______
	78		78

	2		2
d.		x		=	______
	5		5

	4		3
e.		x		=	______
	7		4

	4		1
f.		x		=	______
	8		2

	10		10
g.		÷		=	______
	30		50

7. Solve for x in the following equations.

x + 3 = 5
-6 + x = 9
10x = 130

8. Convert to the given units.

a.	200 millivolts	=	_____	Volts
b.	0.03 Volts	=	_____	Millvolts
c.	1000 Amperes	=	_____	Kiloampere
d.	0.5 Amperes	=	_____	Milliamps
e.	0.7 megOhms	=	_____	Ohms

9. Use Ohm's Law to answer the following questions.

Given an electrical circuit with a driving voltage of 12 Volts and a resistance of 10 Ohms, how much current does the circuit produce?
_________
A corrosion circuit produces 2 Amperes of current at a driving voltage of 1.6 Volts, what is the resistance of this circuit?
_________

10. Use Ohm's Law to answer the following questions.

Given: A 5 Amp/50 mV shunt has a voltage drop of 12 mV.
Find: What is the amount of current in this circuit?
_________

Given: A 30 Amp/50 mV shunt has a voltage drop of 10 mV.
Find: What is the amount of current in this circuit?
_________

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