Neiep 300 Final Exam | Comprehensive Study Guide And Practice Examination (2026/2027) | Electrical Fundamentals For Elevator Constructors

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NEIEP 300 FINAL EXAM | COMPREHENSIVE
STUDY GUIDE AND PRACTICE EXAMINATION
(2026/2027) | ELECTRICAL FUNDAMENTALS
FOR ELEVATOR CONSTRUCTORS




Table of Contents

1. Electrical Theory, Circuits, and Ohm's Law

2. Magnetism and Transformers

3. AC/DC Generators and Motors

4. Switches, Relays, and Control Devices

5. Mathematics and Conversions

6. Hydraulic Elevator Systems and Components

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SECTION 1: ELECTRICAL THEORY, CIRCUITS, AND OHM'S LAW

Question 1: An elevator control circuit has a resistance of 10 ohms. If 5 amps of current flows
through the circuit, what is the applied voltage according to Ohm's Law?

A) 50 V

B) 15 V

C) 2 V

D) 0.5 V

Correct Answer: A) 50 V

Ohm's Law states E = I × R, where E is voltage in volts, I is current in amperes, and R is
resistance in ohms. Substituting: E = 5A × 10 ohms = 50 V. Choice B incorrectly adds
values; Choice C divides resistance by current; Choice D divides current by resistance,
reversing the formula.

Question 2: A door operator circuit draws 6 amps of current when connected to a 120 V
supply. What is the total resistance of the circuit?

A) 20 ohms

B) 720 ohms

C) 0.05 ohms

D) 126 ohms

Correct Answer: A) 20 ohms

Rearranging Ohm's Law for resistance: R = E / I = 120 V / 6 A = 20 ohms. Choice B
incorrectly multiplies E × I, which is the power formula; Choice C inverts the division;
Choice D adds rather than divides. Resistance is the opposition to current flow, measured in
ohms.

Question 3: What will happen to the current in a circuit if the resistance is doubled?

A) Current will double

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B) Current will remain the same

C) Current will be halved

D) Current will increase fourfold

Correct Answer: C) Current will be halved

Ohm's Law states that current (I) is inversely proportional to resistance (R) when voltage is
held constant. Therefore, doubling the resistance will reduce the current by half.

Question 4: How do you measure voltage in a circuit?

A) Connected in series with the circuit

B) Connected in parallel with the component

C) Connected in series with the power source

D) Connected in parallel with the power source

Correct Answer: B) Connected in parallel with the component

A voltmeter must be connected in parallel with the component being measured to measure the
potential difference across it. Connecting in series would interrupt the circuit and give
incorrect readings.

Question 5: What is the outermost shell of an atom called?

A) Proton shell

B) Neutron shell

C) Valence shell

D) Electron shell

Correct Answer: C) Valence shell

The valence shell is the outermost shell of an atom. It contains valence electrons, which are
involved in chemical bonding and determine the atom's conductivity.

Question 6: The nucleus of an atom contains what?

A) Electrons and protons

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B) Neutrons and protons

C) Electrons and neutrons

D) Only protons

Correct Answer: B) Neutrons and protons

The nucleus of an atom contains protons (positively charged) and neutrons (neutral).
Electrons orbit the nucleus in shells.

Question 7: What does the E symbol represent in Ohm's law?

A) Current

B) Resistance

C) Voltage

D) Power

Correct Answer: C) Voltage

In Ohm's law, E represents electromotive force, which is the voltage. The formula is E = I ×
R, where I is current and R is resistance.

Question 8: What happens to the total resistance in a wire if the length is doubled?

A) Resistance is halved

B) Resistance remains the same

C) Resistance is doubled

D) Resistance is quadrupled

Correct Answer: C) Resistance is doubled

Resistance is directly proportional to the length of a conductor. If the length is doubled, the
resistance is doubled. This relationship is expressed as R = ρL/A, where L is length and A is
cross-sectional area.

Question 9: If an atom has only one electron in its valence shell, _____.

A) Atom will act as a good insulator