MEP SYSTEMS I ELECTRICAL EXAM – HOUSTON (ACTUAL
2025/2026) QUESTIONS AND VERIFIED ANSWERS
What is a circuit that contains only resistive components, such
as heating elements and incandescent lamps? (21-460) - ----
Answers---Resistive Circuit
What is the state when voltage and current reach their
maximum amplitude and zero level simultaneously? (21-460) -
----Answers---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) - ----Answers---
Inductance
The greater the inductance in a circuit, the (larger / smaller)
the phase shift. (21-460) - ----Answers---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) - ----Answers---
Capacitance
,The greater the capacitance in a circuit, the (larger / smaller)
the phase shift. (21-460) - ----Answers---Larger
What is the most commonly used conductor? (21-461) - ----
Answers---Copper
What are the disadvantages of Aluminum as a conductor?
Advantages? (21-461) - ----Answers---Not as good of a
conductor as copper
Cheaper and lighter
What is heat measured in? (21-461) - ----Answers---British
Thermal Units (Btu) or Calories (cal)
A calorie is the amount of heat needed to do what? (21-461) - -
---Answers---Raise 1 gram of water 1 Celsius
A British Thermal Unit is the amount of heat needed to do
what? (21-461) - ----Answers---Raise 1 pound of water 1
Fahrenheit
One BTU = How many calories? (21-461) - ----Answers---252
Calories or 0.252 Kilocalories
What conducts and dissipates heat away from an object? (21-
462) - ----Answers---Heat Sink
, How do you convert Fahrenheit to Celsius? (21-463) - ----
Answers---Subtract 32 from temperature, and divide by 1.8.
What is the portion of the electromagnetic spectrum that
produces radiant energy? (21-463) - ----Answers---Light
Visible light with the longest wavelengths produce which
color? (21-463) - ----Answers---Red
What is a unit used to measure the total amount of light
produced by a light source? (21-464) - ----Answers---Lumen
(lm)
What is the amount of light produced by a lamp (lumens)
divided by the area that is illuminated? (21-464) - ----
Answers---Footcandle (fc)
What states that the amount of illumination on a surface varies
inversely with the square of the distance from the light
source? (21-464) - ----Answers---Inverse Square Law
What states that current in a circuit is proportional to the
voltage and inversely proportional to the resistance? (23-493)
- ----Answers---Ohm's Law
2025/2026) QUESTIONS AND VERIFIED ANSWERS
What is a circuit that contains only resistive components, such
as heating elements and incandescent lamps? (21-460) - ----
Answers---Resistive Circuit
What is the state when voltage and current reach their
maximum amplitude and zero level simultaneously? (21-460) -
----Answers---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) - ----Answers---
Inductance
The greater the inductance in a circuit, the (larger / smaller)
the phase shift. (21-460) - ----Answers---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) - ----Answers---
Capacitance
,The greater the capacitance in a circuit, the (larger / smaller)
the phase shift. (21-460) - ----Answers---Larger
What is the most commonly used conductor? (21-461) - ----
Answers---Copper
What are the disadvantages of Aluminum as a conductor?
Advantages? (21-461) - ----Answers---Not as good of a
conductor as copper
Cheaper and lighter
What is heat measured in? (21-461) - ----Answers---British
Thermal Units (Btu) or Calories (cal)
A calorie is the amount of heat needed to do what? (21-461) - -
---Answers---Raise 1 gram of water 1 Celsius
A British Thermal Unit is the amount of heat needed to do
what? (21-461) - ----Answers---Raise 1 pound of water 1
Fahrenheit
One BTU = How many calories? (21-461) - ----Answers---252
Calories or 0.252 Kilocalories
What conducts and dissipates heat away from an object? (21-
462) - ----Answers---Heat Sink
, How do you convert Fahrenheit to Celsius? (21-463) - ----
Answers---Subtract 32 from temperature, and divide by 1.8.
What is the portion of the electromagnetic spectrum that
produces radiant energy? (21-463) - ----Answers---Light
Visible light with the longest wavelengths produce which
color? (21-463) - ----Answers---Red
What is a unit used to measure the total amount of light
produced by a light source? (21-464) - ----Answers---Lumen
(lm)
What is the amount of light produced by a lamp (lumens)
divided by the area that is illuminated? (21-464) - ----
Answers---Footcandle (fc)
What states that the amount of illumination on a surface varies
inversely with the square of the distance from the light
source? (21-464) - ----Answers---Inverse Square Law
What states that current in a circuit is proportional to the
voltage and inversely proportional to the resistance? (23-493)
- ----Answers---Ohm's Law
