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IEC YEAR 2 PART 3 EXAM ENTRY, Exams of Electrical and Electronics Engineering

Western Governors University (WGU)Electrical and Electronics Engineering

IEC YEAR 2 PART 3 EXAM ENTRY All circuit conductors contribute resistance to a circuit. - Correct Ans: ✔✔True A 19.8-amp, 3Ø, 208-volt load is supplied from THHN/THWN copper circuit conductors. The load is located 152 feet from the panel. Limiting the voltage drop to 1.8%, the smallest circuit conductors you can use to supply the load are ___ AWG. Use K = 10.86 to solve this problem. - Correct Ans: ✔✔8

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1 | P a g e
IEC YEAR 2 PART 3 EXAM ENTRY.
1. All circuit conductors contribute resistance to a circuit. -
Correct Ans: ✔✔True
2. A 19.8-amp, 3Ø, 208-volt load is supplied from THHN/THWN
copper circuit conductors. The load is located 152 feet from the
panel. Limiting the voltage drop to 1.8%, the smallest circuit
conductors you can use to supply the load are ___ AWG. Use K
= 10.86 to solve this problem. - Correct Ans: ✔✔8
3. A 3Ø 480-volt, 41 KVA load is located a distance of 280 feet
from the 480-volt panel. If K=11.3, and the wire is 8 AWG,
calculate the voltage applied to the load. - Correct Ans:
✔✔464
4. Regardless of who created an unsafe condition, you should ___.
I. correct it II. report it III. ignore it - Correct Ans: ✔✔I
and II only
5. After witnessing any unsafe acts or seeing any unsafe
conditions you should ___.I. discuss issues II. learn from them
III. prevent future issues - Correct Ans: ✔✔I, II, and III
6. No guardrails, not enough illumination, poor ventilation, and no
GFCI protection are examples of ___. - Correct Ans: ✔✔unsafe
conditions
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IEC YEAR 2 PART 3 EXAM ENTRY.

  1. All circuit conductors contribute resistance to a circuit. - Correct Ans: ✔✔True
  2. A 19.8-amp, 3Ø, 208-volt load is supplied from THHN/THWN copper circuit conductors. The load is located 152 feet from the panel. Limiting the voltage drop to 1.8%, the smallest circuit conductors you can use to supply the load are ___ AWG. Use K = 10.86 to solve this problem. - Correct Ans: ✔✔ 8
  3. A 3Ø 480-volt, 41 KVA load is located a distance of 280 feet from the 480-volt panel. If K=11.3, and the wire is 8 AWG, calculate the voltage applied to the load. - Correct Ans: ✔✔ 464
  4. Regardless of who created an unsafe condition, you should ___. I. correct it II. report it III. ignore it - Correct Ans: ✔✔I and II only
  5. After witnessing any unsafe acts or seeing any unsafe conditions you should ___.I. discuss issues II. learn from them III. prevent future issues - Correct Ans: ✔✔I, II, and III
  6. No guardrails, not enough illumination, poor ventilation, and no GFCI protection are examples of ___. - Correct Ans: ✔✔unsafe conditions
  1. Placing your body or body parts into dangerous moving parts of machines is an ___. - Correct Ans: ✔✔unsafe act
  2. ___ has (have) control of unsafe acts on construction sites. - Correct Ans: ✔✔You
  3. Unsafe acts can include ___. I. using defective tools II. ignoring warning signs III. not using PPE IV. working near energized circuits - Correct Ans: ✔✔I, II, III, and IV
  4. The principal cause(s) of accidents on construction sites is (are) ___.I. unsafe acts II. unsafe rules III. unsafe conditions - Correct Ans: ✔✔I and II
  5. ___ law states "charged bodies attract or repel each other with a force that is directly proportional to the product of the charges and inversely proportional to the square of the distance between them." - Correct Ans: ✔✔Coulomb's
  6. Which of the formulas, shown below, is correct to find the equivalent of three inductors in a parallel circuit? - Correct Ans: ✔✔LT= 1 / ( 1/L1 + 1/L2 + 1/L3)
  7. If the RMS value is 125 volts, what is the peak value? - Correct Ans: ✔✔176.
  1. Nonferrous materials, such as copper, ___ attracted by the magnetic field around a magnet. - Correct Ans: ✔✔are not
  2. A coil of wire wrapped around an iron core is a(n) ___ when it carries current. - Correct Ans: ✔✔electromagnet
  3. Motors, circuit breakers, contactors, relays, and motor starters all use ___ principles. - Correct Ans: ✔✔electromagnetic
  4. The strength of the magnetic field around a coil (or winding) ___ when AC voltage is applied. - Correct Ans: ✔✔varies
  5. The basic law of magnetism states that unlike poles (south and north, for example) ___ each other. - Correct Ans: ✔✔attract
  6. As two magnetic poles of the same polarity get closer together the force of ___ gets stronger. - Correct Ans: ✔✔repulsion
  7. A coil of wire, when carrying current, acts like a ___. - Correct Ans: ✔✔magnet
  1. The invisible magnetic lines that leave the north pole and enter the south pole of a magnet are ___. - Correct Ans: ✔✔lines of flux
  2. A ___ is a device that attracts iron and steel because of the molecular alignment of its material. - Correct Ans: ✔✔magnet
  3. Current flow through a conductor creates a magnetic field around the conductor. - Correct Ans: ✔✔True
  4. As current flow through a conductor increases, the magnetic field strength ___. - Correct Ans: ✔✔increases
  5. The strength of the magnetic field around a coil (or winding) ___ when DC voltage is applied. - Correct Ans: ✔✔is constant
  6. If the current flowing through a coil of wire is increased, the magnetic field strength ___. - Correct Ans: ✔✔also increases
  7. If a circuit is operating at 277 volts (RMS) the peak value of the voltage is ___ volts. - Correct Ans: ✔✔391.
  1. A charged body is surrounded by ___. - Correct Ans: ✔✔a magnetic field
  2. ___ is the output of an AC generator measured in cycles per second. - Correct Ans: ✔✔Frequency
  3. When two like-charged bodies are brought together, their magnetic fields will work to ___ them. - Correct Ans: ✔✔repel
  4. ___ when current flows in a conductor. - Correct Ans: ✔✔both a and b
  5. The vertical axis on a voltage sine wave, generated from an AC generator, represents ___. - Correct Ans: ✔✔voltage
  6. Where operating in the United States, AC voltage reaches a positive peak ___ times during 1 second. - Correct Ans: ✔✔ 60
  7. ___ current constantly changes direction of flow and magnitude as it completes the circuit from a power source to a load and then back to the power source. - Correct Ans: ✔✔AC
  8. An AC generator produces ___ cycle(s) per revolution for each pair of poles. - Correct Ans: ✔✔one
  1. The peak-to-peak value of a sine wave is ___ the maximum positive peak value. - Correct Ans: ✔✔twice
  2. A capacitor is made up of a pair of conductive plates separated by a thin layer of ___ material. - Correct Ans: ✔✔insulating
  3. The magnetic field strength around a conductor is at its maximum when the AC current is at ___ degrees. - Correct Ans: ✔✔ 90
  4. ___ is the property of an electrical circuit that opposes any change in current. - Correct Ans: ✔✔Inductance
  5. Inductors in series add like resistors in ___. - Correct Ans: ✔✔series
  6. Which of the formulas, shown below, is correct to find the equivalent of 3 caps in a parallel circuit? - Correct Ans: ✔✔CT=C1+C2+C
  7. Inductance is measured in ___. - Correct Ans: ✔✔Henrys
  8. A change in the magnetic field surrounding the conductor induces a voltage in the conductor. This induced voltage is known as ___. - Correct Ans: ✔✔Counter EMF
  1. Use only Lockout/Tagout devices authorized for the particular equipment. These devices are to be ___.I. standardized II. substantial III. durable - Correct Ans: ✔✔I, II & III
  2. Insure that Lockout/Tagout devices identify the ___. - Correct Ans: ✔✔individual
  3. Compliance with Lockout/Tagout prevents an estimated ___ fatalities each year. - Correct Ans: ✔✔ 120
  4. ___ is the property of an electrical circuit that opposes any change in current. - Correct Ans: ✔✔Inductance
  5. Impedance is represented by the letter ___. - Correct Ans: ✔✔Z
  6. In a purely capacitive circuit, current is said to ___ the applied source voltage. - Correct Ans: ✔✔lead
  7. The presence of inductive reactance in a circuit affects current flow. What is the designated symbol for inductive reactance? - Correct Ans: ✔✔XL
  8. In an inductive circuit, the current ___ the applied voltage. - Correct Ans: ✔✔lags
  1. In an AC circuit containing resistance plus inductance, or resistance plus capacitance, or resistance plus inductance and capacitance, the opposition to current flow is called ___. - Correct Ans: ✔✔impedance
  2. The presence of capacitive reactance in a circuit affects current flow. What is the designated symbol for capacitive reactance? - Correct Ans: ✔✔XC
  3. A series circuit has both inductive and capacitive loads. The loads supply equal reactance to circuit current. Which of the following statements is true? - Correct Ans: ✔✔both of these
  4. For an AC circuit, current and voltage are in phase with each other when ___. - Correct Ans: ✔✔XL + XC = 0
  5. In addition to resistance, which of the following circuit components also affect current flow? - Correct Ans: ✔✔both a & b
  6. Which of the following is (are) measured in ohms? - Correct Ans: ✔✔all of these
  1. In a series circuit where inductive reactance is less than capacitive reactance, resulting in a negative phase angle, current will ___ voltage. - Correct Ans: ✔✔lead
  2. In a purely resistive circuit, current is said to ___ the applied source voltage. - Correct Ans: ✔✔be in phase with
  3. For an AC circuit, current and voltage are in phase with each other when ___. - Correct Ans: ✔✔XL + XC = 0
  4. When the current and the voltage in a circuit have negative peaks at the same time and positive peaks at the same time they are said to be ___. - Correct Ans: ✔✔in phase
  5. In a purely inductive circuit, current is said to ___ the applied source voltage. - Correct Ans: ✔✔lag
  6. In either a purely inductive or purely capacitive circuit, the most the phase angle between the current and the voltage can be out of phase with each other is ___. - Correct Ans: ✔✔90°
  7. PCB oils are ___.I. non-hazardous II. carcinogenic III. poison-gas producing - Correct Ans: ✔✔II & III only
  8. PCBs were used as insulation in ___. - Correct Ans: ✔✔all of these
  1. When handling PCB transformer oil, you must wear ___. - Correct Ans: ✔✔all of these
  2. If a hazardous liquid is spilled, the proper procedure is to ___. - Correct Ans: ✔✔all of these
  3. In case of a spill of a hazardous material, you should ___. - Correct Ans: ✔✔all of these
  4. PCBs contained in oil do not contribute to airborne health hazards. - Correct Ans: ✔✔False
  5. Apparent power is measured in ___. - Correct Ans: ✔✔volt-amps
  6. Reactive power is measured in ___. - Correct Ans: ✔✔volt-amps reactive
  7. ___ power is power that passes through reactive components, which do not consume energy, and returns to the source. - Correct Ans: ✔✔Reactive
  8. True power will always be greater than apparent power. - Correct Ans: ✔✔False

separate grounding conductor was NOT installed in either raceway. The impedance of the Sealtite® is 500 ohms. - Correct Ans: ✔✔11.45 A

  1. In an AC circuit containing resistance plus inductance, or resistance plus capacitance, or resistance plus inductance and capacitance, the opposition to current flow is called ___. - Correct Ans: ✔✔impedance
  2. The total current in a parallel circuit is ___ Amps. The circuit is supplied from a 2-pole breaker in a 120/208-V 3-ph panel. The circuit has a resistance of 25 ohms, an inductive reactance of 14 ohms and a capacitive reactance of 10 ohms. - Correct Ans: ✔✔10.
  3. Impedance is represented by the letter ___. - Correct Ans: ✔✔Z
  4. The impedance of a series circuit is ___ ohms. The circuit has a resistance of 25 ohms, an inductive reactance of 14 ohms and a capacitive reactance of 10 ohms. - Correct Ans: ✔✔25.
  5. In a circuit with 25 ohms resistance and 50 ohms capacitive reactance, the impedance is ___ - Correct Ans: ✔✔55.
  6. Impedance is measured in ___. - Correct Ans: ✔✔ohms
  1. The sum of all three components of current opposition is referred to as ___. - Correct Ans: ✔✔impedance
  2. A transformer has an efficiency of 95%. To deliver 1 kVA of power to a load, the transformer must be supplied with ___ VA of power on the primary. - Correct Ans: ✔✔ 1053
  3. True power is the power used in a circuit by purely ___ loads or components of a circuit. - Correct Ans: ✔✔resistive
  4. The unit of measurement for power is ___. - Correct Ans: ✔✔watts
  5. What is the power used by a 12-volt circuit with 24 amperes of current? - Correct Ans: ✔✔ 288
  6. Power is measured in ___. - Correct Ans: ✔✔watts
  7. Refer to Figure 215.21. Primary power = ___ mW. - Correct Ans: ✔✔ 144
  8. ___ is the ratio of the actual power delivered by a load divided by the input power required by the load to operate. - Correct Ans: ✔✔Power factor

the dryer for this period of time is ___. - Correct Ans: ✔✔$4.

  1. The apparent power used by an induction motor circuit is ___ the true power delivered by the motor. - Correct Ans: ✔✔greater than
  2. Capacitor banks are rated in ___. - Correct Ans: ✔✔KVAR
  3. When using a hoist, move the load with ___ motion. Do not jerk the load. - Correct Ans: ✔✔even
  4. Never add a ___ to a hoist to attempt to lift more load. - Correct Ans: ✔✔any of these
  5. Hoist equipment is used to help us ___ large or heavy equipment.I. lift II. move III. push - Correct Ans: ✔✔I or II only
  6. When ___ a hoist to a structure, make sure the structure is strong enough. - Correct Ans: ✔✔attaching
  7. The ___ capacity of a hoist is sufficient to lift the intended load. - Correct Ans: ✔✔rated
  1. When operating a hoist, do not allow anyone under a ___ load. - Correct Ans: ✔✔suspended
  2. Never use a hoist that is damaged or has been ___. - Correct Ans: ✔✔abused
  3. Type ___ tranformer enclosures are rated for outdoor use. - Correct Ans: ✔✔3R
  4. ___ should be used to connect the conductors to the "tabs" of a large transformer. - Correct Ans: ✔✔Lugs
  5. Transformer power losses are reduced by using a core that is constructed of ___. - Correct Ans: ✔✔laminated sheets of metal
  6. Transformers are used to change alternating current to direct current. - Correct Ans: ✔✔False
  7. Ignoring losses, ___ is equal on both sides of a step-up or step-down transformer. - Correct Ans: ✔✔power
  8. Transformers are used by utility companies for power transmission to step up voltages and reduce ___. - Correct Ans: ✔✔current