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Construction Electrician - Advanced


Quiz Questions

1. The following figure represents ______________.?
PDH Course - Construction Electrician - Advanced
Period of Cosine wave
Period of Sine wave
Period of Tan wave
None of the above
2. The effective value (I eff) of any sine wave of current is always ___________ times the maximum value (I max).
0.707
1.414
3.343
4.234
3. Basic unit of inductance is ___________ .?
Amperes
Coulombs
Henry
Ohm
4. A capacitor is a physical device consisting of two pieces of conducting material separated by a dielectric. Dielectric is an ____________.?
Insulator
Conductor
Both A & B
5. What is the Power factor for the series circuit shown below, given True power = 1,500V and Apparent power = 2,500 VA.
PDH Course - Construction Electrician - Advanced 2
0.2
0.3
0.6
0.9
6. If Resistive current I = 5 A and Resistance is 60 Ohms, what is the true power in a series circuit.?
500 Watts
1000 Watts
1500 Watts
2000 Watts
7. The following figure represents ________________.?
PDH Course - Construction Electrician - Advanced 3
Series Circuit
Parallel Circuit
Series – Parallel Circuit
None of the above
8. When reactance and resistance are combined, the value of the impedance will be greater than either.
True
False
9. A _______________ capacitor will store one coulomb of charge (energy) when a potential of one volt is applied across the capacitor plates.
one-farad
two-farad
three-farad
four-farad
10. With an ac voltage, in the first quarter-cycle (0° to 90°) the applied voltage is_________________ .
Continually increasing
Continually decreasing
remains constant
11. The opposing force which an inductor presents to the flow of alternating current cannot be called resistance, since it is not the result of friction within a conductor.
True
False
12. The formula for average voltage is ______________ where E avg is the average voltage of one alternation, and E max is the maximum or peak voltage.
Eavg = 0.136 X E max
Eavg = 0.236 X E max
Eavg = 0.536 X E max
Eavg = 0.636 X E max
13. The number of complete cycles of alternating current or voltage completed each second is referred to as the_______________.?
Frequency
Resistance
Capacitance
14. Ohm’s law cannot be applied to alternating-current circuits since it does not consider the reactance which is always present in such circuits.
True
False
15. If Impedance is 5 Ohms and Resistance 4 Ohms what is the power factor ____________.?
0.2
0.4
0.6
0.8
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