SCE Cheat Sheet 2026

The 30 highest-yield SCE facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. What is the Carnot efficiency of a heat engine operating between 600K and 300K? → 50%
2. The Cayley-Hamilton theorem states that every square matrix: → Satisfies its own characteristic equation
3. What type of foundation is most commonly used for high-rise buildings in Jeddah's weak soil conditions? → Bored piles (drilled shafts) bearing on rock
4. What is the purpose of cover to reinforcement in concrete structures? → To protect steel from corrosion and provide fire resistance
5. SBC 601 (Electrical Code) requires ground fault circuit interrupter (GFCI) protection in: → Bathrooms, kitchens, outdoor areas, and areas near water sources
6. The first law of thermodynamics is a statement of: → Conservation of energy
7. A cantilever beam of length 4 m carries a point load of 20 kN at its free end. What is the maximum shear force? → 20 kN
8. In water resources engineering, the rational method formula Q = CiA is used to estimate: → Peak runoff rate from a small catchment
9. In fluid mechanics, Reynolds number determines: → Whether flow is laminar or turbulent
10. What is the difference between engineering stress and true stress? → Engineering stress uses original area; true stress uses instantaneous area
11. In construction scheduling, crashing an activity means: → Adding extra resources to reduce the activity's duration at increased cost
12. Which numerical method uses the formula x_{n+1} = x_n - f(x_n)/f'(x_n)? → Newton-Raphson method
13. Bernoulli's equation assumes: → Steady, incompressible, inviscid flow along a streamline
14. The Castigliano's second theorem states that the displacement at a point equals: → The partial derivative of strain energy with respect to the force at that point
15. Young's modulus is defined as the ratio of: → Stress to strain in the elastic region
16. In reinforced concrete design, the term 'balanced section' refers to: → A section where concrete crushing and steel yielding occur simultaneously
17. A conflict of interest in engineering practice occurs when: → An engineer's personal or financial interests could influence their professional judgment
18. What is the relationship between shear modulus (G), Young's modulus (E), and Poisson's ratio (ν)? → G = E / 2(1+ν)
19. SBC requires building envelope thermal performance testing using: → U-value calculations and compliance with maximum allowable thermal transmittance values
20. What is the work breakdown structure (WBS) in construction management? → A hierarchical decomposition of the total project scope into manageable work packages
21. SBC sandstorm protection requirements for buildings include: → Sealed building envelopes, protected air intakes, and filtration systems
22. The second law of thermodynamics states that: → Entropy of an isolated system never decreases
23. What is the active earth pressure coefficient (Ka) for a soil with friction angle φ = 30°? → Ka = 1/3 (0.333)
24. The maximum allowable settlement for most structures in Saudi Arabia's sandy soils is typically: → 25mm total settlement
25. An engineer asked to certify work they did not supervise should: → Refuse to certify the work, as it violates professional ethics
26. The Gantt chart is used in construction for: → Visually displaying the project schedule with activity bars against a time axis
27. What is the condition number of a matrix used for? → Measuring sensitivity of the solution to input perturbations
28. The Saudi Building Code classifies occupancy types primarily to: → Determine fire safety requirements, structural loads, and means of egress
29. A continuous beam has more load-carrying capacity than a simply supported beam of the same span and cross-section primarily because: → Continuity redistributes moments, reducing the maximum positive moment
30. Which structural system transfers loads primarily through axial tension or compression with negligible bending? → Truss