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MEP SYSTEMS I (COSC 325) ELECTRICAL EXAM – HOUSTON
LATEST 2025 ACTUAL EXAM WITH COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS (100% VERIFIED ANSWERS)
|ALREADY GRADED A+| ||PROFESSOR VERIFIED||
||BRANDNEW!!!||
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
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______-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
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What is the amount of electrons flowing through an electrical
circuit? (21-459) - ANSWER-Current (I)
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 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
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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)
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 the unit of measure for Apparent Power? (21-459) -
ANSWER-Volt Amps (VA)
MEP SYSTEMS I (COSC 325) ELECTRICAL EXAM – HOUSTON
LATEST 2025 ACTUAL EXAM WITH COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS (100% VERIFIED ANSWERS)
|ALREADY GRADED A+| ||PROFESSOR VERIFIED||
||BRANDNEW!!!||
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
,2|Page
______-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
,3|Page
What is the amount of electrons flowing through an electrical
circuit? (21-459) - ANSWER-Current (I)
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 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
, 4|Page
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)
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 the unit of measure for Apparent Power? (21-459) -
ANSWER-Volt Amps (VA)
