2nd Quarter EXAM in EIM 2025-2026

Multiple Choice: Encircle the letter of the correct answer. What is the basic characteristic of a parallel circuit?

• Current has multiple paths to flow.

• Current flows through only one path

• Voltage is divided among components

• Resistance is the same across all components.

Multiple Choice: Encircle the letter of the correct answer. What type of switch is used to control a light from two different locations?

• Three-way switch/ Two-way switch

• Triple-pole, double-throw (TPDT) switch

• Double-pole, double-throw (DPDT) switch

• Switch Single-pole, single-throw (SPST) switch

Multiple Choice: Encircle the letter of the correct answer. How does a parallel connection ensure that each component receives the same voltage?

• By using a voltage regulator

• By increasing the total resistance of the circuit

• By dividing the current equally among all branches.

• By providing a separate path to the power source for each component.

Multiple Choice: Encircle the letter of the correct answer. If you connect a simple light circuit and a 3-way switch circuit in parallel, and the simple light is turned off, what happens to the 3-way switch circuit?

• It dims the light.

• It stops working

• It continues to work normally

• It only works from one switch location

Multiple Choice: Encircle the letter of the correct answer. You need to wire a garage light that can be controlled from the house and the garage. Which wiring configuration should you use?

• A simple series circuit.

• A series-parallel combination

• A parallel circuit with 3-way switches.

• A parallel circuit with two SPST switches.

Multiple Choice: Encircle the letter of the correct answer. Differentiate between the wiring of a 3-way switch circuit and a simple on/off circuit.

• A 3-way switch uses a higher voltage than a simple circuit

• A 3-way switch requires travellers, while a simple circuit does not.

• A 3-way switch uses only one switch, while a simple circuit uses two

• A 3-way switch is wired in series, while a simple circuit is wired in parallel.

What are the pros and cons of using parallel circuits for lighting in homes? 

• A. Parallel circuits are less safe because they draw more current.

• B. Series circuits are more efficient because they use less wiring.

• C. Series circuits are always preferred for residential lighting due to their simplicity.

• D. Parallel circuits are safer because if one light fails, the others continue to work, but they can be less efficient due to potentially higher current draw

Why parallel circuits are preferred over series circuits in residential wiring?

• Because series circuits are easier to install.

• Because parallel circuits consume less power.

• Because series circuits provide higher voltage

• Because parallel circuits ensure that if one device fails, the others continue to operate.

What is a primary advantage of single-phase systems?

• Ability to power large industrial motors directly

• More efficient power transmission over long distances.

• Higher power capacity compared to three-phase systems.

• Simpler design and lower cost compared to three-phase systems.

What is the purpose of having a distribution transformer in a single-phase system?

• To convert AC to DC power.

• To regulate the frequency of the power supply.

• To increase the voltage for long-distance transmission.

• To reduce the voltage to levels suitable for residential use.