Code
What are the two functions of the electrical STANDATA?
1) The STANDATA is used to inform the electrical industries of amendments to the Canadian Electrical Code in the province of Alberta and suggests practices for applying the code.
2) Used to inform the industry of new equipment and materials.
In an Edison 3-wire distribution system, how are the three conductors utilized?
2 conductors have equal, but opposite potential at any given time; as one is positive, the other is negative. A third conductor is the neutral conductor which is usually at ground potential.
What are four factors to consider before you take a measurement with a meter?
1) The electrical measurement required. 2) If the circuit is energized or de-energized. 3) The value you expect to obtain from the meter. 4) Whether polarity is important in the electrical measurement.
What law describes the amount of voltage induced when a conductor moves across a magnetic field?
Faradays Law
Calculate the value of current in amperes if 35 coulombs pass a given point along the conductor in 0.5 seconds
I=Q/t
I=35 coulombs/ 0.5 seconds
I=70 amperes
In the Canadian Electrical Code, what section contains the General Rules?
Section 2 - General Rules
Solve Objective 6 Question #4 in the Series-Parallel Resistive Circuits module.
What factors affect the resistance of a conductor?
1) Length of a conductor. 2) The conductors cross-sectional area. 3) Conductor material type. 4) Temperature of the material
One of the batteries could explode.
State the formula for Ohm's Law.
E=IxR or I=E/R or R=E/I
True/ False and what rule? Electrical contractors responsible for carrying out the work shall obtain a permit from the Electrical Department before work begins?
False, Rule: 2-004 Permit
In the Edison 3-Wire Distribution System module (030102F), answer Objective #2 Question #6.
Check back of the book for answer.
What four specific problems are of concern when making terminations or joints with aluminum conductors?
1) Oxidation. 2) Cold flow. 3) Thermal expansion. 4) Galvanic Corrosion.
Where does the piezoelectric effect occur?
Only in non-conductive materials.
What is the electrical power formula?
P=IE or I=P/E or E=P/I
True/ False and What Rule? A minimum working space of 1 meter shall be provided and maintained around electrical equipment?
True, Rule 2-308 Working space around electrical equipment
How many watts are in one horsepower and how many electrons are in a coulomb?
746 watts and 6.24x1018 electrons.
Using Table 1 in your Resistors module (030104d), determine the resistance rating and tolerance of the following resistor: (Ring number 1-4 left to right)
Green, Brown, Red, Silver
5100 +/- 10%
Using the Left-Hand Rule for Conductors, what does your thump indicate and what does your fingers indicate?
Thumb: Direction of Current. Fingers: Direction of Lines of Force.
State the power formula when given a voltage, coulombs and time.
P=(C x V)/t
Answer and What Rule? What marking is required on conductors or cables that will be exposed to the direct rays of the sun?
Suitable answers: SR, Sun Res, Sunlight Resistant, CMX-Outdoor, or cable under Wet Locations in Table 11. Rule 2-136 and Appendix B
What does Kirchhoff's Current Law in a Series-Parallel Circuit state?
The sum of the currents entering a junction must equal the sum of the currents leaving that junction. Or IT= total current flow entering a junction point and I1,I2,I3= total current flow leaving a junction.
What safety hazards may be encountered during the splicing or termination process of fiber optic cables?
A) Small fragments of fiber may be transferred to skin or eyes.
B) Retina damage from looking in the end of an operating cable.
Using Fleming's Left-Hand Rule, what does your thumb, first finger and second finger indicate?
Thumb: Thrust/ Motion of the Conductor. First Finger: Direction of the field lines of force (North to South). Second Finger: Direction of Current Flow.
What is the total circuit power given the following information if the two loads were in parallel (Round to the nearest watt)?
Load 1 - 100 Ohms, 2 Amps
Load 2 - 200 Ohms, 3 Amps
P=1667 watts