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100+ Free SOLAS Electrical Apprenticeship Practice Questions

SOLAS Electrical Apprenticeship (Ireland, NFQ Level 6) practice questions are available now; exam metadata is being verified.

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2026 Statistics

Key Facts: SOLAS Electrical Apprenticeship Exam

100

Practice Questions

OpenExamPrep

NFQ Level 6

Qualification Level

SOLAS / QQI

7 phases

Apprenticeship Structure

SOLAS

I.S. 10101:2020

National Wiring Rules

NSAI

230/400 V, 50 Hz

Irish Supply

ESB Networks

30 mA

RCD for Socket-Outlets

I.S. 10101

The SOLAS Electrical Apprenticeship is Ireland's craft pathway to qualifying as an electrician, placed at NFQ Level 6 and awarded as a QQI Advanced Certificate Craft. Apprentices complete seven alternating on-the-job and off-the-job phases and sit modular written theory papers (multiple-choice and short-answer) plus practical assessments. The theory covers electrical science and circuits, wiring systems and installation, the I.S. 10101:2020 National Rules for Electrical Installations (the successor to ET101), inspection and testing, machines and motors, electronics, controls, and safety and safe isolation. Ireland uses a 230 V single-phase and 400 V three-phase 50 Hz supply, harmonised brown/blue/green-yellow cable colours, and 30 mA RCD protection for socket-outlets. This free prep includes 100 research-based practice questions with explanations and an AI tutor.

Sample SOLAS Electrical Apprenticeship Practice Questions

Try these sample questions to test your SOLAS Electrical Apprenticeship exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In the standard Irish single-phase domestic supply, what is the nominal voltage between line and neutral?
A.110 V
B.230 V
C.240 V
D.400 V
Explanation: The nominal low-voltage supply in Ireland is 230 V single-phase (line to neutral) at 50 Hz, in line with the EU-harmonised value used by ESB Networks. The earlier 220/240 V figures were harmonised to 230 V.
2What is the frequency of the Irish AC mains supply?
A.50 Hz
B.60 Hz
C.100 Hz
D.25 Hz
Explanation: The Irish (and wider European) public electricity supply operates at 50 Hz. This is the number of complete AC cycles per second produced by the generators feeding the ESB transmission network.
3A 3 kW immersion heater operates from a 230 V supply. What current does it draw?
A.13.0 A
B.0.077 A
C.690 A
D.7.5 A
Explanation: Using I = P / V, the current is 3000 W / 230 V = 13.04 A. This is why such a load is typically wired on a dedicated circuit and protected accordingly.
4Three 30 ohm resistors are connected in parallel. What is the total resistance of the combination?
A.90 ohm
B.30 ohm
C.10 ohm
D.0.1 ohm
Explanation: For equal resistors in parallel, the total is the value of one resistor divided by the number of resistors: 30 / 3 = 10 ohm. Adding parallel paths always lowers the overall resistance below the smallest branch.
5In a purely inductive AC circuit, the current waveform relative to the voltage waveform is:
A.In phase
B.Leading by 90 degrees
C.Lagging by 90 degrees
D.Lagging by 45 degrees
Explanation: In a pure inductor the current lags the voltage by 90 degrees because the inductor opposes the change in current. The memory aid 'CIVIL' reminds you that in an inductor (L) the voltage (V) leads the current (I).
6A load draws 10 A at 230 V with a power factor of 0.8 lagging. What is the true power consumed?
A.2300 W
B.1840 W
C.2875 W
D.1472 W
Explanation: True power P = V x I x power factor = 230 x 10 x 0.8 = 1840 W. The remaining apparent power (2300 VA) includes reactive power that does no useful work.
7What is the peak value of a 230 V RMS sinusoidal supply?
A.163 V
B.230 V
C.325 V
D.460 V
Explanation: For a sine wave, peak = RMS x sqrt(2) = 230 x 1.414 = 325 V approximately. This peak voltage is important when selecting insulation and rating components.
8A conductor carries 5 A for 4 minutes. How much charge passes a point in the conductor?
A.20 C
B.1200 C
C.0.75 C
D.300 C
Explanation: Charge Q = I x t, with time in seconds. 4 minutes is 240 s, so Q = 5 x 240 = 1200 coulombs. One ampere is one coulomb per second.
9Which quantity is measured in siemens?
A.Resistance
B.Conductance
C.Inductance
D.Capacitance
Explanation: Conductance is the reciprocal of resistance and is measured in siemens (S). A high conductance means current flows easily, the inverse of a high resistance.
10The resistance of a copper conductor will increase if you:
A.Increase its cross-sectional area
B.Increase its length
C.Decrease its temperature
D.Use a shorter run
Explanation: Resistance is directly proportional to length (R = rho x L / A), so doubling the length doubles the resistance. This is why long cable runs cause greater voltage drop.

About the SOLAS Electrical Apprenticeship Practice Questions

Verified exam format metadata for SOLAS Electrical Apprenticeship (Ireland, NFQ Level 6) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.