Brian Johnson
This is the length of active conductor used when 36.8V is generated by passing it through a magnetic field of 3.6T at a rate of 4.5 metres per second. The conductor is moving at a right angle to the field of flux lines
What is 2.27 metres
Hint: e=blv, see Exercise Book page 33, question 10
A practical inductor has an inductance of 1025mH, an effective resistance of 75 ohms when connected to a 240V, 60Hz source. This is the figure of merit.
What is 5.15
Aaron's review pack, question 4
This is the K value for #6 AWG Teck 90 cable supplying a load with a %pf of 90%. TTR is 75.
What is 1.58
This type of print is what Rob requested to see when working in the electrical room, because he needed to make sure the Transformers would fit
What are Distribution Shop Drawings
Rob says he has none of this left
What is RAM?
An AC Sine wave voltage has a peak of 625 volts. This many degrees into its cycle will the voltage have an instantaneous value of 198 volts
What is 18.47 degrees
A 13W compact fluorescent bulb draws 190mA at 120VAC. This is the calculated circuit VARS and Power Factor
What is 18.73 VARS at 57.02% pf
Aaron's review pack, question 7
This is the maximum number of #12 AWG R90 XLPE 600v-rated conductors (without jacket) that can be installed in a 27mm EMT
What is 18 conductors
You have a transformer rated at 100kVA, step down from 13.2kV to 600V. This is the voltage across the 97.5% tap that will result in 240V of secondary output
What is 5148 volts
*See Aaron's review pack, question 16
Alex did this during the COVID-19 pandemic that allowed him to donate to charity
What is he grew his hair out
A capacitor connected to 240V, 60Hz supply draws 10.5 Amps. This is the micro-farad rating of the capacitor.
What is 116 uF
See Aaron's RLC review pack, question 6
A single trandformer is rated at 10kVA and steps down from 480V to 120V. Alex asks you to wire a load to the transformer, wired to boost. This is the maximum kVA of that load
What is 50kVA
Rob asked you to do some math on site to see if you paid attention in school. In front of you is a box, fed by 2 separate EMTs on your left. One is TS 63, the other is TS78. You're doing a U-pull in this box. This is the minimum distance between the two EMTs, and the minimum length of the box
What is 531 mm and 468 mm
*See code exercise book, last self-test question. Also CEC 12-3036 (c)
A short circuit test is used to determine the available fault current on the secondary terminals of a 100KVA, 4800-240V step down transformer. With the secondary short-circuited, a variable AC supply is adjusted until rated current flows through the primary, which has a supply voltage of 144 volts. This is the secondary's available fault current.
What is 13889 Amps
*See Aaron's review pack, question 29
This is the town where Rob grew up, on a farm with horses
What is Chilliwack, BC
A 240VDC source supplies a series capacitor circuit with a SPST switch installed. C1 is 300uF, C2 is 100uF, 118V. C3 is 200uF and C4 is 23.6V. This is the voltage seen at C1 and C3, the capacitance at C4, and the total capacitance of the circuit
What is
a) C1 39.3V, C3 59V
b) 500 micro farads
c) 49 micro farads
(See Aaron's review pack 2, question 2 for diagram)
A practical inductor has a resistive component of 500 milli-ohms and a power factor of 70.7% lagging when connected to a 120V, 60Hz AC supply. This is the value of capacitive reactance, in micro farads, needed to be connected in parallel and correct the power factor to 90%.
What is 1367 micro farads
See exercise book, question 8
This is the ampacity of 5 #4 AWG TW copper in a run of ENMT
What is 56A
A short circuit occured in the system you were charged with installing from scratch. But you messed up, and the short circuit completely fried the wires and damaged your circuit breaker. This is the rating you ignored when selecting your breaker for the circuit
What is an Interrupting Rating
This is how much money Alex made per hour on his first electrical job
What is 7,50$
A DC source is supplying a series circuit. The circuit contains a 275mH inductor, followed by a 15 ohm resistor, followed by a 0.75H inductor. The circuit then had a SPST switch installed. This is how long it will take for the current to reach Steady State value once the switch is closed
What is 0.34 seconds
A 25 uF capacitor is series connected across a 240V, 60Hz supply. This is the current value and power factor of the circuit
What is 2.26 Amps, 0% pf
*this is an unrealistic, pure capacitance circuit or ICE circuit
This is the size of copper conductor required to supply a 16146 W load at 277V, located 90 meters from the source, without exceeding a 3% voltage drop. The load is operating at unity power factor, uses R90 XLPE insulated conductors, and all equipement has a 75 terminal temperature rating
What is #3 AWG Copper
This component captures the heat in a fridge, while this component turns the refrigerant back into liquid form.
FOR DOUBLE POINTS: These components will do THIS when they are apart of a heat pump installed for a residence
What is the Evaporator
What is the Condenser
DOUBLE POINTS: What is they swap roles
This is Rob's absolute favourite dessert for which he goes feral for
What is Baclava