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MEP Systems I (COSC 325) Electrical Exam 2025:
Comprehensive Study Guide, Circuit Analysis, Wiring
Diagrams, Electrical Calculations & Practice
Questions
Ace the MEP Systems I (COSC 325) Electrical Exam with this comprehensive 2025 study guide covering
electrical circuits, wiring diagrams, load calculations, safety standards, and troubleshooting techniques.
Includes practice questions, detailed solutions, and high-yield concepts to help engineering students
master electrical systems in mechanical, electrical, and plumbing (MEP) design projects
MEP Systems I COSC 325 electrical exam
COSC 325 electrical study guide
MEP electrical systems exam 2025
COSC 325 practice questions electrical
What is a current that flows in only one direction called? (21-459) - ANSWER-Direct (DC) Current
What is a current that reverses its direction of flow at regular intervals? (21-459) - ANSWER-Alternating
(AC) Current
What is current flow from positive to negative called? (21-459) - ANSWER-Conventional Current Flow
What is current flow from negative to positive called? (21-459) - ANSWER-Electron Current Flow
What is the rate of doing work or using energy? (21-459) - ANSWER-Power (P)
What is the actual power used in the electrical circuit called? (21-459) - ANSWER-True Power (P t)
What is the unit of measure for True Power? (21-459) - ANSWER-Watts (W)
,2|Page
What is the product of the voltage and current in a circuit calculated without considering the phase shift
that may be present between the voltage and current in the circuit? (21-459) - ANSWER-Apparent Power
(P a)
What is a symmetric waveform that contains 360 electrical degrees? (21-456) - ANSWER-AC Sine Wave
What is one complete positive and negative alteration of a wave form? (21-456) - ANSWER-Cycle
What is half a Cycle? (21-456) - ANSWER-Alternation
How many Alternations does a Sine Wave have? (21-456) - ANSWER-2
1 Positive and 1 Negative
______-phase AC Voltage only contains one alternating voltage waveform. (21-457) - ANSWER-One
______-phase AC Voltage is a combination of three alternating voltage waveforms, each displaced by
120 electrical degrees (1/3 Cycle) apart. (21-457) - ANSWER-Three
True or False? Almost any level of AC Voltage is available. (21-457) - ANSWER-True
What is the value measured from the maximum positive alternation to the maximum negative
alternation? (21-458) - ANSWER-Peak-to-Peak Value (P p-p)
What is the mathematical mean of all instantaneous voltage values in the sine wave? (21-458) -
ANSWER-Average Value (V avg) of a Sine Weve
What is the value that produces the same amount of heat in a pure resistive circuit as a DC current of the
same value? (21-458) - ANSWER-Root-Mean-Square (Effective) Value (V rms) of a Sine Wave
What is the amount of electrons flowing through an electrical circuit? (21-459) - ANSWER-Current (I)
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What is Current measured in?
It represents the number of electrons passing a given point in one second. (21-459) - ANSWER-Amperes
(A)
The more power a load requires, the (larger / smaller) the amount of current flow. (21-459) - ANSWER-
Larger
What is the unit of measure for Apparent Power? (21-459) - ANSWER-Volt Amps (VA)
True or False? True Power is always less than Apparent Power in any circuit in which there is a phase shift
between voltage and current. (21-459) - ANSWER-True
What is a circuit that contains only resistive components, such as heating elements and incandescent
lamps? (21-460) - ANSWER-Resistive Circuit
What is the state when voltage and current reach their maximum amplitude and zero level
simultaneously? (21-460) - ANSWER-In-Phase
What is the property of a circuit that causes it to appose a change in current due to the energy stored in
a magnetic field?
All transformers create this. (21-460) - ANSWER-Inductance
The greater the inductance in a circuit, the (larger / smaller) the phase shift. (21-460) - ANSWER-Larger
What is the ability of a component to store energy in the form of an electrical charge?
It is produced by Capacitors (21-460) - ANSWER-Capacitance
The greater the capacitance in a circuit, the (larger / smaller) the phase shift. (21-460) - ANSWER-Larger
MEP Systems I (COSC 325) Electrical Exam 2025:
Comprehensive Study Guide, Circuit Analysis, Wiring
Diagrams, Electrical Calculations & Practice
Questions
Ace the MEP Systems I (COSC 325) Electrical Exam with this comprehensive 2025 study guide covering
electrical circuits, wiring diagrams, load calculations, safety standards, and troubleshooting techniques.
Includes practice questions, detailed solutions, and high-yield concepts to help engineering students
master electrical systems in mechanical, electrical, and plumbing (MEP) design projects
MEP Systems I COSC 325 electrical exam
COSC 325 electrical study guide
MEP electrical systems exam 2025
COSC 325 practice questions electrical
What is a current that flows in only one direction called? (21-459) - ANSWER-Direct (DC) Current
What is a current that reverses its direction of flow at regular intervals? (21-459) - ANSWER-Alternating
(AC) Current
What is current flow from positive to negative called? (21-459) - ANSWER-Conventional Current Flow
What is current flow from negative to positive called? (21-459) - ANSWER-Electron Current Flow
What is the rate of doing work or using energy? (21-459) - ANSWER-Power (P)
What is the actual power used in the electrical circuit called? (21-459) - ANSWER-True Power (P t)
What is the unit of measure for True Power? (21-459) - ANSWER-Watts (W)
,2|Page
What is the product of the voltage and current in a circuit calculated without considering the phase shift
that may be present between the voltage and current in the circuit? (21-459) - ANSWER-Apparent Power
(P a)
What is a symmetric waveform that contains 360 electrical degrees? (21-456) - ANSWER-AC Sine Wave
What is one complete positive and negative alteration of a wave form? (21-456) - ANSWER-Cycle
What is half a Cycle? (21-456) - ANSWER-Alternation
How many Alternations does a Sine Wave have? (21-456) - ANSWER-2
1 Positive and 1 Negative
______-phase AC Voltage only contains one alternating voltage waveform. (21-457) - ANSWER-One
______-phase AC Voltage is a combination of three alternating voltage waveforms, each displaced by
120 electrical degrees (1/3 Cycle) apart. (21-457) - ANSWER-Three
True or False? Almost any level of AC Voltage is available. (21-457) - ANSWER-True
What is the value measured from the maximum positive alternation to the maximum negative
alternation? (21-458) - ANSWER-Peak-to-Peak Value (P p-p)
What is the mathematical mean of all instantaneous voltage values in the sine wave? (21-458) -
ANSWER-Average Value (V avg) of a Sine Weve
What is the value that produces the same amount of heat in a pure resistive circuit as a DC current of the
same value? (21-458) - ANSWER-Root-Mean-Square (Effective) Value (V rms) of a Sine Wave
What is the amount of electrons flowing through an electrical circuit? (21-459) - ANSWER-Current (I)
, 3|Page
What is Current measured in?
It represents the number of electrons passing a given point in one second. (21-459) - ANSWER-Amperes
(A)
The more power a load requires, the (larger / smaller) the amount of current flow. (21-459) - ANSWER-
Larger
What is the unit of measure for Apparent Power? (21-459) - ANSWER-Volt Amps (VA)
True or False? True Power is always less than Apparent Power in any circuit in which there is a phase shift
between voltage and current. (21-459) - ANSWER-True
What is a circuit that contains only resistive components, such as heating elements and incandescent
lamps? (21-460) - ANSWER-Resistive Circuit
What is the state when voltage and current reach their maximum amplitude and zero level
simultaneously? (21-460) - ANSWER-In-Phase
What is the property of a circuit that causes it to appose a change in current due to the energy stored in
a magnetic field?
All transformers create this. (21-460) - ANSWER-Inductance
The greater the inductance in a circuit, the (larger / smaller) the phase shift. (21-460) - ANSWER-Larger
What is the ability of a component to store energy in the form of an electrical charge?
It is produced by Capacitors (21-460) - ANSWER-Capacitance
The greater the capacitance in a circuit, the (larger / smaller) the phase shift. (21-460) - ANSWER-Larger
