This document contains practice questions and explanations from an electrician exam preparation course. It includes questions about series and parallel circuits involving household appliances, calculating total current and voltage drop in circuits, determining the total VA for a 3-phase circuit, and calculating the minimum number of circuits needed to support a lighting load. Mitchell Tolbert is identified as a master electrician who provides electrician exam preparation and testing.

1. Appliances
MITCHELL TOLBERT, MASTER ELECTRICIAN. ELECTRICIAN TESTING, 855-PSI-EXAM (TOLL
FREE)

2. MITCHELL TOLBERT, MASTER
ELECTRICIAN. ELECTRICIAN

3. POWER OR WATTS OR VA
* 1.73 FOR 3 PHASE
MITCHELL TOLBERT, MASTER ELECTRICIAN. ELECTRICIAN TESTING, 855-PSI-
EXAM (TOLL FREE)

4. Series Resistors:
 Given a Plasma TV having a maximum value of
50 ohms of resistance, in series with a Hair
dryer of 30 ohms, and a curling iron of 20
ohms, calculate the total Current, in amperes
for this 120V rated circuit:
MITCHELL TOLBERT, MASTER ELECTRICIAN. ELECTRICIAN TESTING, 855-PSI-EXAM (TOLL FREE)

5. Ohm’s Law
MITCHELL TOLBERT, MASTER
ELECTRICIAN. ELECTRICIAN

6.  Give a Plasma TV with 50 ohms of
resistance, in parallel with a Hair dryer of 30
ohms, and a curling iron of 20 ohms,
calculate the total Current, in amperes for
this 120V rated circuit:
MITCHELL TOLBERT, MASTER
ELECTRICIAN. ELECTRICIAN

7. Parallel Resistors:
Calculate the Total Current:
MITCHELL TOLBERT, MASTER
ELECTRICIAN. ELECTRICIAN
310 Ω’s
110 Ω’s
210 Ω’s
What is the voltage drop across
each resistor?

8. Ohm’s Law – Voltage Drop
MITCHELL TOLBERT, MASTER
ELECTRICIAN. ELECTRICIAN

9. MITCHELL TOLBERT, MASTER
ELECTRICIAN. ELECTRICIAN

10. Parallel Loads
MITCHELL TOLBERT, MASTER
ELECTRICIAN. ELECTRICIAN
Vd?Vd? Vd?
120V

11. Amperage at Each Load?
MITCHELL TOLBERT, MASTER
ELECTRICIAN. ELECTRICIAN
Vd?
Vd?
Vd?
120
V

12. Amperage in Parallel
Loads
MITCHELL TOLBERT, MASTER
ELECTRICIAN. ELECTRICIAN
480V

13. What is the Total VA
for a 3 Φ (Phase)
150A --- 208V
circuit?
Remember the 1.73 multiplier when calculating 3 phase Voltage
problems
208 X 1.73 X 150A = 53,976 VA
MITCHELL TOLBERT, MASTER
ELECTRICIAN. ELECTRICIAN

14. MITCHELL TOLBERT, MASTER
ELECTRICIAN. ELECTRICIAN

15. Given an office lighting load
that has a rating of 7,200 VA,
calculate the minimum number
of 15A circuits that would be
required to sustain this
continuous 277V lighting
demand?
1. 2 ckts?
2. 3 ckts?
3. 4 ckts?MITCHELL TOLBERT, MASTER
ELECTRICIAN. ELECTRICIAN