EEI TECH EEI Tech Trainer 3 — Questions and Answers
Question 1: Using Ohm's law, what is the current through a circuit with 12 volts and 4 ohms of resistance?
- 48 amps
- 8 amps
- 3 amps (Correct answer)
- 0.33 amps
Correct answer: 3 amps
Current equals voltage divided by resistance, so 12 ÷ 4 = 3 amps.
Question 2: A lever has its fulcrum closer to the load than to the effort. This arrangement primarily provides:
- Increased speed
- Increased mechanical advantage to lift heavy loads (Correct answer)
- No advantage
- Reduced force output
Correct answer: Increased mechanical advantage to lift heavy loads
Placing the fulcrum near the load gives a longer effort arm, increasing force to lift heavy loads.
Question 3: A graph shows temperature flattening into a horizontal line over time. What does the horizontal portion indicate?
- Temperature is rising
- Temperature is falling
- Temperature is holding steady (Correct answer)
- The graph is broken
Correct answer: Temperature is holding steady
A horizontal line means the value is not changing, so temperature is steady.
Question 4: A technician must follow a written work order that lists steps in numbered sequence. Why is following the exact order important?
- It looks more professional
- Steps may depend on prior steps for safety and correctness (Correct answer)
- It uses fewer tools
- Order never matters
Correct answer: Steps may depend on prior steps for safety and correctness
Numbered steps often build on each other, so skipping order can cause errors or hazards.
Question 5: Three resistors of 6 ohms each are connected in parallel. What is the total resistance?
- 18 ohms
- 6 ohms
- 3 ohms
- 2 ohms (Correct answer)
Correct answer: 2 ohms
Equal parallel resistors give total resistance of one resistor divided by the count: 6 ÷ 3 = 2 ohms.
Question 6: A crew lays 0.5 miles of cable per hour. How long to lay 4 miles?
- 2 hours
- 4 hours
- 8 hours (Correct answer)
- 16 hours
Correct answer: 8 hours
4 miles divided by 0.5 miles per hour equals 8 hours.
Question 7: On a meter scale, the needle rests exactly between the 20 and 30 marks. What is the most accurate reading?
- 20
- 25 (Correct answer)
- 30
- 50
Correct answer: 25
A needle halfway between 20 and 30 indicates a value of 25.
EEI TECH EEI Tech Trainer 3
Using Ohm's law, what is the current through a circuit with 12 volts and 4 ohms of resistance?