Saskatchewan Polytech Introductory Electrical Theory and Practices Exam Practice

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• In a series RLC circuit, at resonance the impedance is purely resistive and approximately equal to the resistor value.
• In a half-wave rectifier with a 10 V peak input, what is the average DC output (ignoring diode drop)?
• The device that converts light energy into electrical energy in solar cells is called a what?
• Which statement describes insulation damage due to excessive current?
• What is the unit of impedance?
• Which type of stress causes the piezoelectric effect?
• The extra regulations in Saskatchewan are known as Sask Interpretations.
• Calculate the inductive reactance X_L for L = 200 mH at f = 50 Hz.
• Which device must have three terminals when used as a voltage divider?
• A resistor of 8 Ω is connected across a 24 V supply. What is the power dissipated in the resistor?
• In continuity testing, what does a successful beep indicate about the path between probes?
• Generators use which principle to produce electricity?
• A substance made up of atoms of more than one type is called a what?
• Which of the following is NOT listed as a useful application of electrostatic charge?
• What is the resonance frequency formula for a series RLC circuit and how is f0 expressed?
• An ideal transformer has a primary voltage of 240 V and turns ratio N1:N2 = 4:1. What is the secondary voltage V2?
• Electrical work is generally inspected at what two stages?
• Like charges ______, and unlike charges ______.
• If you want to protect the meter when measuring resistance, what precaution is essential?
• If X_L > X_C in a series circuit, what can be said about the net reactance and the circuit’s character?
• Anything that occupies space or has mass is referred to as?
• In Saskatchewan, who is responsible for supervising an apprentice's on-the-job training hours?
• What is a open Circuit?
• Which of the following is NOT one of the seven factors that affect the severity of electric shock?
• In a delta-connected three-phase system, the line voltage equals the phase voltage.
• What is the term used for a fully qualified electrician after completing apprenticeship and exams?
• Which resistor type is formed by coating a nonconductive tube with resistance material?
• Which statement best describes the relationship between Thevenin's and Norton's theorems?
• The triboelectric effect relies on what process?
• Which statement describes the three types of fixed resistors?
• The product of EMF, Current, and time is ___________.
• Calculate the capacitive reactance X_C for C = 100 μF at f = 50 Hz.
• In a series circuit with R1 = 4 Ω and R2 = 6 Ω connected to a 24 V source, what is the total resistance and the current in the circuit?
• Which statement best describes apprenticeship wages during training?
• A diagram that shows the equipment in a realistic 3D view is called
• Which of the following is NOT a factor affecting resistance?
• A rheostat is typically used in a circuit to adjust resistance by connecting in series with loads.
• If the magnitude of one charge doubles, the electrostatic force between the charges will increase by how many times?
• In a DC motor, what is back-EMF and how does it affect current as speed increases?
• What is a closed Circuit?
• In a circuit with a 5 V source, a silicon diode forward drop ~0.7 V, and a 1 kΩ resistor in series, what approx current if diode conducts?
• In a star-connected three-phase system, how are line current and phase current related?
• The solar cell inside a simple calculator is called what?
• Inductive reactance X_L is proportional to frequency and inductance. Which expression correctly gives X_L?
• Which statement correctly describes conventional current and electron flow?
• If a conductor's length is doubled and cross-sectional area doubled, how does its resistance change?
• Apprentices work under qualified journeypersons to complete a certain number of hours of on-the-job training each apprenticeship year.
• All electrical sources convert energy from what into electrical energy?
• What does AWG stand for, and how does wire gauge relate to current-carrying capacity?
• Which description matches a carbon composition resistor?
• Which type of circuit breaker combines both thermal and magnetic trip elements?
• What are the typical frequency and a common three-phase line-to-line voltage in Canada for distribution?
• If voltage applied to a circuit increases, the current through the circuit does what, assuming resistance stays the same?
• How do you test continuity with a multimeter, and what does a beep indicate?
• When apprentices complete the last level of technical training, they can choose to write the provincial journeyperson exam.
• What does wattage rating indicate in resistors?
• The smallest independent portion that a substance can be broken down into and still possess its properties is a what?
• Which phenomenon is the triboelectric effect most closely related to among the following?
• A positively charged atom has ________ electrons relative to protons.
• In a DC circuit, a load is connected to a 25 V source and draws 5 A. What is the load resistance?
• A 12 V source feeds a 3 Ω resistor. If the resistor is replaced with 4 Ω, what happens to the current?
• EMF stands for what?
• Which equation gives the inductive reactance X_L in a circuit with frequency f and inductance L?
• Which of the following describes a short circuit?
• If power P = 9 W and resistance R = 4 Ω, what is the current I using the relation I = sqrt(P/R)?
• Which statement describes Kirchhoff's Voltage Law?
• Which formula expresses voltage (E) in terms of current (I) and resistance (R)?
• In a typical electrical system, what is the primary function of protective earth (PE)?
• When measuring voltage with a voltmeter, how should the meter be connected to the circuit?
• Which method produces electricity via the photovoltaic effect?
• Which factor among the seven affecting electric shock specifically describes the path the current takes through the body?
• Which statement describes typical material used as the resistive wire in a wire-wound resistor?
• Which devices conduct during the positive half-cycle in a bridge rectifier?
• Explain how conductor length affects voltage drop and one method to mitigate it.
• Which diagram does not show individual conductors?
• What is the purpose of power factor correction and how is it typically achieved?
• An apprentice is eligible to write the IP journeyperson trade exam, and become certified as a JP after 7200 hours.
• A capacitor is specified as 470 μF, 10 V. What maximum DC voltage should be applied to protect capacitor from breakdown?
• In a three-phase system with a star (Y) connection, given a line-to-line voltage V_LL, what is the phase voltage V_phase?
• A design drawing that shows how the circuit operates is called
• Most metals are what kind of conductors?
• Which statement is true when X_L = X_C in a series circuit?
• The energy stored in a capacitor is E = 1/2 C V^2. A 100 μF capacitor charged to 200 V stores how many joules?
• Which method is NOT a way a body may receive an electrostatic charge?
• It can be dangerous to use an Ohmmeter or continuity tester in an ____________ circuit.
• A low resistant path in parallel with the load is called a ___________
• Apprentices are typically paid between 40% and 70% of the current journeyperson wage.
• A thermocouple converts heat energy into electrical energy. Which option correctly states this energy conversion?
• Semiconductors contain how many valence electrons?
• Which diagram shows where each conductor connects to components, not their physical layout?
• The smallest unit that retains the properties of a substance and can be separated without losing identity is a what?
• What are the extra regulations required in Saskatchewan called?
• If the resistance of a circuit decreases while voltage stays the same, the current will do what?
• In electrical grounding, what is the purpose of protective earth (PE) and bonding?
• A copper conductor is 100 m long and has cross-sectional area of 2.5 mm^2. With resistivity 1.68×10^-8 Ωm, what is the resistance?
• What is the maximum number of electrons that can be in the valence shell?
• Which equation expresses power in a circuit according to Watts Law?
• For the same 60 Hz series RLC circuit, what is the approximate power factor if R = 50 Ω and X_L − X_C = −15.4 Ω?
• What is the typical forward voltage drop of a silicon diode used in small-signal circuits?
• In a simple series circuit, what is the voltage drop across a component?
• What is the maximum number of electrons that can be in the valence orbital of an atom?
• Three necessary components of a circuit are?
• In a parallel circuit with R1 = 6 Ω and R2 = 3 Ω across a 12 V source, what is the total resistance and the total current drawn from the source?
• The product of power and time is ______________.
• Which formula expresses power in terms of current (I) and resistance (R)?
• Which describes the standard schematic symbols for resistor, capacitor, inductor, and diode?
• Bulletins provide additional information about code rules.
• Energy stored in an inductor is E = 1/2 L I^2. If L = 0.5 H and I = 2 A, how much energy is stored?
• If current I = 2 A and voltage E = 12 V, what is power P?
• What is a Short Circuit?
• In a balanced three-phase system with line voltage V_L and line current I_L, the real power is P = √3 V_L I_L cosφ. If V_L = 480 V, I_L = 20 A, cosφ = 0.8, what is P?
• The triboelectric effect generates electricity by what mechanism?
• Briefly explain how a bridge rectifier works and identify the conduction path during the positive half-cycle.
• If the applied voltage increases while the resistance is constant, the current will
• What does the law of conservation of energy state?
• Devices designed to convert other forms of energy into electrical energy are referred to as ______ of electricity.
• Which statement best describes Kirchhoff's Current Law?
• Which statement correctly describes typical digital multimeter measurement settings for voltage, current, and resistance?
• In a full-wave bridge rectifier with a sinusoidal input, what is the approximate average DC output in terms of V_peak (ignoring diode drops)?
• Which expressions correctly define impedance and the inductive and capacitive reactances in an AC circuit?
• A device that generates electricity by heating a junction of two dissimilar metals is called a?
• A schematic diagram that shows two vertical lines on either side of the drawing is called a
• If R1 = 3 Ω is in series with the parallel of R2 = 6 Ω and R3 = 3 Ω, what is the total resistance?
• Which expression gives the energy stored in a capacitor?
• Which device is a variable resistor used as a voltage divider with three terminals in the circuit?
• Most of the electrical energy in a typical home is produced by what devices?
• Name two common electrical hazards and one mitigation method for each.
• The atomic number refers to the number of what in the nucleus?
• What is a GFCI and where is it typically required?
• Which formula expresses power as current times voltage?
• Which statement best describes the electrical conductivity of most metals?
• A GFCI protects against which fault condition?
• A 120 V source drives a load of 8 Ω. What is the current and the voltage drop across the load?
• Which term describes Adjustable or Sliding Contact Resistor?
• If ω0 = 1000 rad/s, what is f0 in Hz?
• In orbits further from the nucleus, the energy possessed by the electrons what?
• Who Publishes Changes and additions to CEC in SK
• A diagram ignores the actual physical locations of components.
• Which statement best defines a closed circuit?
• Which statement correctly identifies the unit of inductive reactance X_L?
• Which method relies on a temperature difference to generate electricity?
• In copper conductors, what happens to ampacity as wire gauge becomes thicker (lower AWG number)?
• If the resistance of a circuit decreases, what happens to the power dissipated by the circuit?
• How does a megohmmeter test insulation resistance and what value indicates acceptable insulation in a dry environment?
• What happens to conductors when the current is too High?
• To de-energize the load, the switch must be __________.
• The energy of electrons in orbitals farther from the nucleus is what?
• A substance formed when two or more elements join chemically is called a what?
• Why must a voltmeter have infinite resistance and an ammeter have zero resistance?
• What is the basic operating principle of an induction motor and how does slip relate to rotor speed?
• Which of the following is NOT listed as a method of producing electricity?
• The Electrician Trade is a compulsory apprenticeship trade.
• In a 60 Hz circuit with R = 50 Ω, L = 100 mH, C = 50 μF in series, what is X_L, what is X_C, and which term dominates the net reactance?
• Which statement correctly describes Norton’s theorem and its relation to Thevenin's theorem?
• Which method of producing electricity involves mechanical stress?
• Which material is commonly used as the resistive wire in a wire-wound resistor?
• Energy stored in a 470 μF capacitor when charged to 10 V is?
• Who enforces the Canadian Electrical Code?
• Direction of electron flow is from ______.
• Which lists all four factors affecting resistance?
• For a balanced three-phase system with line voltage V_L and line current I_L, which expression gives the real power P?
• A network consists of R1 = 2 Ω in series with the parallel combination of R2 = 4 Ω and R3 = 6 Ω. What is the total resistance?
• What is the correct expression for current through a resistor when a voltage V is applied across it and the resistance is R?
• What does wattage rating indicate in resistors?
• If the voltage applied to a circuit doubles, the power dissipated by the circuit increases by how many times?
• The smallest portion of an element that retains the properties of the element is called an ______.
• If X_L equals X_C in a series circuit, what happens to the impedance and the power factor?
• Read resistor color code: Brown-Black-Red-Gold. What is the resistance value and tolerance?
• What is the RMS value of a sinusoidal voltage with a peak of 170 V?
• An electron that has broken loose from its atom is called a what?
• What is a protective device and how does it protect circuits?
• What is Thevenin's theorem and how is it used in circuit analysis?
• Wire Wound Resistor is described as:
• The product of EMF and Current is _____________.
• Which circuit breaker uses solid-state electronics to interrupt current?
• How many types of fixed resistors are identified?
• What are the basic transistor types and their roles in switching and amplification?
• What is a Load in a Circuit?
• How is additional info about rules of code provided?
• The diagram that uses two vertical rails on either side of the drawing is called a
• Watts Law states that the power in a circuit is equal to the product of voltage multiplied by the current in the circuit. Which option expresses this relation?
• How is transformer efficiency calculated in terms of input and output power?
• The electromagnetic induction effect is also known as which term?
• What is a variable resistor?
• A ______ Diagram shows where each conductor is connected.
• A diagram that shows the equipment in a realistic 3D view is called a
• Carbon Composition Resistor is described as:
• What is potential difference?
• Which method is based on magnetoelectric or electromagnetic effects?
• Which diagram is easiest to understand for a person with little knowledge of electricity?
• In a series RLC circuit, which condition yields resonance and what happens to the impedance at resonance?
• In a basic circuit, which set of components is essential?
• Ohm's law states which relationship among current, voltage, and resistance?
• Resistors can be Classified into Two Categories.
• Apprenticeship training is mandatory for anyone wishing to work in the electrician trade.