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100+ Free SCE FE Mechanical Practice Questions

Pass your Saudi Council of Engineers Fundamentals of Engineering (FE) — Mechanical exam on the first try — instant access, no signup required.

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Key Facts: SCE FE Mechanical Exam

50

Discipline Questions

SCE / Qiyas

3 hours

Discipline Time Limit

SCE / Qiyas

400 SAR

Discipline Exam Fee

SCE FAQ

Pass/Fail

Scaled Scoring

SCE / Qiyas

English

Exam Language

SCE / Qiyas

Associate

SCE Classification

Saudi Council of Engineers

The SCE FE Mechanical discipline exam is a 3-hour computer-based test with 50 multiple-choice questions in English, administered by Qiyas. The discipline portion costs 400 SAR (800 SAR total with the 90-question general part). Each part is scored pass/fail on a scaled basis; SCE/Qiyas do not publish a fixed percentage threshold. This practice bank targets the mechanical discipline syllabus for Associate Engineer credentialing.

Sample SCE FE Mechanical Practice Questions

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

1An ideal gas at 300 K and 200 kPa is compressed isothermally to 400 kPa in a piston-cylinder device. If the initial volume is 0.5 m³, what is the final volume?
A.0.25 m³
B.0.375 m³
C.0.667 m³
D.1.0 m³
Explanation: For isothermal ideal gas: P₁V₁ = P₂V₂ → V₂ = P₁V₁/P₂ = (200)(0.5)/400 = 100/400 = 0.25 m³.
2A Carnot heat engine operates between a source at 800 K and a sink at 300 K. What is the maximum theoretical thermal efficiency?
A.37.5%
B.62.5%
C.75.0%
D.87.5%
Explanation: Carnot efficiency η = 1 − T_L/T_H = 1 − 300/800 = 1 − 0.375 = 0.625 = 62.5%. Temperatures must be in absolute units (kelvin).
3According to the first law of thermodynamics for a closed system undergoing a process, which expression is correct?
A.ΔU = Q − W (sign convention: heat in positive, work out positive)
B.ΔU = Q + W for all thermodynamic sign conventions
C.Q = W for any adiabatic process
D.ΔU = 0 for any isothermal ideal gas process
Explanation: With the common engineering sign convention (heat added to system positive, work done by system positive), the first law is ΔU = Q − W. This accounts for energy stored as internal energy change.
4Steam at 2 MPa with a quality x = 0.85 enters a turbine. Which property set must be consulted from steam tables to determine the specific enthalpy?
A.Saturated liquid and saturated vapor enthalpies at 2 MPa
B.Superheated steam table at 2 MPa only
C.Compressed liquid table regardless of quality
D.Ideal gas relation h = cpT alone
Explanation: For a wet mixture, h = h_f + x(h_g − h_f), requiring saturated liquid enthalpy h_f and saturated vapor enthalpy h_g at the given pressure from steam tables.
5Air in a rigid insulated tank (ΔQ = 0, ΔV = 0) is stirred by a paddle wheel adding 50 kJ of shaft work. If the internal energy increases by 50 kJ, the process is:
A.Isothermal
B.Isobaric
C.Isochoric adiabatic with work input
D.Isentropic expansion
Explanation: Rigid tank → constant volume (isochoric). Insulated → adiabatic (Q = 0). First law: ΔU = Q − W_shaft_on_system; with Q = 0 and 50 kJ work on system, ΔU = 50 kJ.
6The second law of thermodynamics states that the entropy of an isolated system:
A.Always decreases during spontaneous processes
B.Remains constant only for reversible processes and increases for irreversible ones
C.Is always zero at absolute zero for all substances
D.Equals heat transfer divided by temperature for any open system
Explanation: For an isolated system, ΔS ≥ 0. Equality holds for reversible processes; irreversible processes produce positive entropy generation within the isolated system.
7An ideal gas with k = 1.4 expands isentropically from P₁ = 500 kPa to P₂ = 100 kPa. What is the temperature ratio T₂/T₁?
A.0.574
B.0.669
C.0.741
D.1.495
Explanation: Isentropic ideal gas: T₂/T₁ = (P₂/P₁)^((k−1)/k) = (100/500)^(0.4/1.4) = (0.2)^0.2857 ≈ 0.669.
8In a vapor-compression refrigeration cycle, the purpose of the throttling valve is to:
A.Increase refrigerant pressure before the condenser
B.Reduce pressure and temperature of liquid refrigerant entering the evaporator
C.Compress refrigerant vapor to high pressure
D.Remove heat from refrigerant in the evaporator
Explanation: The expansion/throttling valve is an isenthalpic device that drops refrigerant pressure, causing partial flash evaporation and low temperature before the evaporator absorbs heat.
9A heat pump delivers 3 kW of heat to a building while consuming 1 kW of electrical power. What is the coefficient of performance (COP)?
A.0.33
B.1.0
C.3.0
D.4.0
Explanation: COP_hp = Q_H / W_in = 3 kW / 1 kW = 3.0. Heat pumps move more thermal energy than the work input under favorable conditions.
10Which thermodynamic property is NOT a state function?
A.Internal energy
B.Enthalpy
C.Heat transfer
D.Entropy
Explanation: Heat (and work) are path functions depending on how a process occurs. Internal energy, enthalpy, and entropy are state functions determined solely by the current equilibrium state.

About the SCE FE Mechanical Exam

The SCE Fundamentals of Engineering (FE) Mechanical discipline exam is the specialized portion of the Qiyas-administered FE credentialing pathway for mechanical engineers in Saudi Arabia. After passing the 90-question general engineering session, candidates sit a 50-question, 3-hour mechanical discipline exam covering thermodynamics, fluid mechanics, heat transfer, machine design, dynamics, materials science, and manufacturing processes. Passing both parts supports SCE Associate Engineer classification.

Assessment

50 multiple-choice discipline questions (140 total across general + discipline FE exam)

Time Limit

3 hours (discipline portion)

Passing Score

Pass/fail scaled score on each part (minimum threshold not published)

Exam Fee

400 SAR (discipline portion) (Saudi Council of Engineers (SCE) / Qiyas (NCA))

SCE FE Mechanical Exam Content Outline

15%

Thermodynamics

First and second laws, property tables, ideal gas processes, Carnot and Rankine cycles, entropy, and psychrometrics basics

15%

Fluid Mechanics

Hydrostatics, continuity and Bernoulli equations, laminar/turbulent flow, Moody diagram, pumps, and flow measurement

15%

Heat Transfer

Fourier's law, Newton's law of cooling, Stefan-Boltzmann radiation, fin efficiency, and LMTD heat exchanger analysis

15%

Machine Design

Combined stress, fatigue S-N curves, shaft torsion/bending, bolted joints, rolling bearings, and spur gear fundamentals

15%

Dynamics and Vibrations

Particle kinematics, Newton's second law, work-energy, impulse-momentum, rigid-body rotation, and single-DOF vibration

15%

Materials Science and Mechanics

Tensile test behavior, hardness scales, iron-carbon diagram, heat treatment, and corrosion resistance selection

10%

Manufacturing Processes

Casting defects, forming limits, turning/milling parameters, welding processes, GD&T tolerances, and surface roughness

How to Pass the SCE FE Mechanical Exam

What You Need to Know

  • Passing score: Pass/fail scaled score on each part (minimum threshold not published)
  • Assessment: 50 multiple-choice discipline questions (140 total across general + discipline FE exam)
  • Time limit: 3 hours (discipline portion)
  • Exam fee: 400 SAR (discipline portion)

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

SCE FE Mechanical Study Tips from Top Performers

1Memorize key thermodynamic relations: ideal gas law, isentropic process relations, and Carnot efficiency — these appear frequently in calculation items.
2Practice Bernoulli and continuity problems with consistent unit conversions between Pa, bar, and head (m of fluid).
3Review Fourier's law and the convection rate equation Q = hA(Ts − T∞) for steady one-dimensional problems.
4Study combined loading on shafts: von Mises or maximum shear stress for bending plus torsion.
5Know Reynolds number thresholds (laminar Re < 2300, turbulent Re > 4000 in pipe flow) and Moody diagram usage.
6Familiarize yourself with common manufacturing trade-offs: casting vs. forging vs. machining for cost and mechanical properties.

Frequently Asked Questions

What is the SCE FE Mechanical discipline exam?

The SCE FE Mechanical discipline exam is Part 2 of the Qiyas Fundamentals of Engineering exam for mechanical engineers in Saudi Arabia. It consists of 50 multiple-choice questions over 3 hours, testing core mechanical engineering fundamentals required for SCE Associate Engineer classification.

How is the full SCE FE exam structured?

The full SCE/Qiyas FE exam has two sessions: a 90-question general engineering part (3 hours) covering mathematics, physics, and basic engineering sciences, followed by a 50-question discipline-specific part (3 hours) in mechanical, civil, electrical, chemical, industrial, or structural engineering.

Who is eligible to take the SCE FE Mechanical exam?

Senior students, recent graduates, and practicing engineers with a bachelor's degree in mechanical engineering (or equivalent) from an accredited institution may register. Candidates must hold valid SCE membership and complete qualification verification before scheduling through Qiyas.

What is the passing score and exam fee?

SCE/Qiyas report FE results as pass or fail on a scaled basis; a fixed percentage passing score is not published on saudieng.sa. Per SCE FAQ, the Qiyas FE general portion costs 400 SAR and the discipline portion costs 400 SAR (800 SAR total per full attempt). Fees are paid through SADAD during Qiyas registration.

What topics are covered on the mechanical discipline portion?

The mechanical discipline exam covers thermodynamics, fluid mechanics, heat transfer, machine design, dynamics and vibrations, materials science, and manufacturing processes — the core areas of mechanical engineering practice.

Is the exam administered in Arabic or English?

The SCE/Qiyas FE exam is administered in English via computer-based testing at official Qiyas centers throughout Saudi Arabia. Candidates should be comfortable reading technical mechanical engineering terminology in English.