NEIEP 600 FINAL EXAM – NATIONAL
ELEVATOR INDUSTRY EDUCATIONAL
PROGRAM (NEIEP) ASSESSMENT –
2026/2027] ACTUAL QUESTIONS AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
| INSTANT DOWNLOAD PDF
Capacitors and RC Circuits (Questions 1–15)
1. In capacitors, what is the purpose of the dielectric?
• A) To increase the capacitor's physical size
• B) To prevent arcing between the plates
• C) To decrease the capacitor's voltage rating
• D) To serve as a conductor for current flow
Correct Answer: B) To prevent arcing between the plates
Rationale: The dielectric is an insulating material placed between the two conductive
plates of a capacitor. Its primary function is to prevent direct contact between the plates,
which would cause a short circuit and arcing, while allowing an electric field to form and
store energy.
2. What describes a capacitor's ability to store an electrical charge?
, • A) Resistance
• B) Inductance
• C) Capacitance
• D) Reactance
Correct Answer: C) Capacitance
Rationale: Capacitance, measured in farads (F), is the property of a capacitor that
determines how much electrical charge it can store per unit of voltage applied.
3. What happens in a circuit when the capacitor voltage equals the source voltage?
• A) Current flow increases
• B) Current flow stops in the circuit
• C) The capacitor discharges
• D) The capacitor shorts out
Correct Answer: B) Current flow stops in the circuit
Rationale: When a capacitor is fully charged, its voltage equals the source voltage. At
this point, no more current flows because there is no potential difference to drive
electron movement.
4. In a DC circuit, which is correct about capacitors the instant when power is
applied?
• A) Voltage is maximum
• B) Current is maximum
, • C) Current is zero
• D) Capacitor acts as an open circuit
Correct Answer: B) Current is maximum
Rationale: At the instant power is applied, an uncharged capacitor acts like a short
circuit, allowing maximum current to flow. As the capacitor charges, current decreases
until it reaches zero at full charge.
5. By increasing the distance between the plates of a capacitor, you __________ the
charge capacity.
• A) increase
• B) decrease
• C) double
• D) do not change
Correct Answer: B) decrease
Rationale: Capacitance is inversely proportional to the distance between plates (C =
εA/d). Increasing the plate distance decreases capacitance, which reduces the capacitor's
ability to store charge.
6. Which of the following is true about capacitors in AC circuits?
• A) Voltage leads current
• B) Current leads voltage all the time
• C) Current and voltage are in phase
, • D) Capacitors block all AC current
Correct Answer: B) Current leads voltage all the time
Rationale: In a purely capacitive AC circuit, current leads voltage by 90 degrees. This
occurs because the capacitor's voltage cannot change instantaneously, while current
can.
7. What is the time constant for a circuit with 150k ohms and a 2 microfarad
capacitor?
• A) 0.03 seconds
• B) 0.3 seconds
• C) 3.0 seconds
• D) 30 seconds
Correct Answer: B) 0.3 seconds
Rationale: The time constant (TC) is calculated as TC = R × C. TC = 150,000 Ω ×
0.000002 F = 0.3 seconds.
8. If frequency is increased in a capacitive circuit, what will happen?
• A) Capacitive reactance will increase
• B) Capacitive reactance will decrease
• C) Capacitive reactance will stay the same
• D) The capacitor will short circuit
Correct Answer: B) Capacitive reactance will decrease
ELEVATOR INDUSTRY EDUCATIONAL
PROGRAM (NEIEP) ASSESSMENT –
2026/2027] ACTUAL QUESTIONS AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
| INSTANT DOWNLOAD PDF
Capacitors and RC Circuits (Questions 1–15)
1. In capacitors, what is the purpose of the dielectric?
• A) To increase the capacitor's physical size
• B) To prevent arcing between the plates
• C) To decrease the capacitor's voltage rating
• D) To serve as a conductor for current flow
Correct Answer: B) To prevent arcing between the plates
Rationale: The dielectric is an insulating material placed between the two conductive
plates of a capacitor. Its primary function is to prevent direct contact between the plates,
which would cause a short circuit and arcing, while allowing an electric field to form and
store energy.
2. What describes a capacitor's ability to store an electrical charge?
, • A) Resistance
• B) Inductance
• C) Capacitance
• D) Reactance
Correct Answer: C) Capacitance
Rationale: Capacitance, measured in farads (F), is the property of a capacitor that
determines how much electrical charge it can store per unit of voltage applied.
3. What happens in a circuit when the capacitor voltage equals the source voltage?
• A) Current flow increases
• B) Current flow stops in the circuit
• C) The capacitor discharges
• D) The capacitor shorts out
Correct Answer: B) Current flow stops in the circuit
Rationale: When a capacitor is fully charged, its voltage equals the source voltage. At
this point, no more current flows because there is no potential difference to drive
electron movement.
4. In a DC circuit, which is correct about capacitors the instant when power is
applied?
• A) Voltage is maximum
• B) Current is maximum
, • C) Current is zero
• D) Capacitor acts as an open circuit
Correct Answer: B) Current is maximum
Rationale: At the instant power is applied, an uncharged capacitor acts like a short
circuit, allowing maximum current to flow. As the capacitor charges, current decreases
until it reaches zero at full charge.
5. By increasing the distance between the plates of a capacitor, you __________ the
charge capacity.
• A) increase
• B) decrease
• C) double
• D) do not change
Correct Answer: B) decrease
Rationale: Capacitance is inversely proportional to the distance between plates (C =
εA/d). Increasing the plate distance decreases capacitance, which reduces the capacitor's
ability to store charge.
6. Which of the following is true about capacitors in AC circuits?
• A) Voltage leads current
• B) Current leads voltage all the time
• C) Current and voltage are in phase
, • D) Capacitors block all AC current
Correct Answer: B) Current leads voltage all the time
Rationale: In a purely capacitive AC circuit, current leads voltage by 90 degrees. This
occurs because the capacitor's voltage cannot change instantaneously, while current
can.
7. What is the time constant for a circuit with 150k ohms and a 2 microfarad
capacitor?
• A) 0.03 seconds
• B) 0.3 seconds
• C) 3.0 seconds
• D) 30 seconds
Correct Answer: B) 0.3 seconds
Rationale: The time constant (TC) is calculated as TC = R × C. TC = 150,000 Ω ×
0.000002 F = 0.3 seconds.
8. If frequency is increased in a capacitive circuit, what will happen?
• A) Capacitive reactance will increase
• B) Capacitive reactance will decrease
• C) Capacitive reactance will stay the same
• D) The capacitor will short circuit
Correct Answer: B) Capacitive reactance will decrease
