Civil Engineering Drawing Topic-wise Questions for JE Exam
Topic: Drawing Standards & Conventions
1. The standard size of A1 drawing sheet as per IS 10711 is:
Answer: B
As per IS 10711 (ISO 5457), A1 sheet size is 594 × 841 mm. The A series follows √2 aspect ratio where each size is half the previous: A0 (841×1189), A2 (420×594), A3 (297×420), A4 (210×297).
2. The recommended text height for dimensioning in engineering drawings is:
Answer: B
IS 9609 recommends 3mm text height for dimensions. Main titles use 6-8mm, subtitles 4-5mm. All lettering should be in capital letters, either vertical or inclined at 75° (IS 9609).
3. The line type used for center lines in engineering drawings is:
Answer: C
As per IS 10714 (Part 20), center lines use long chain thin line (alternate long and short dashes). Line thickness is typically 0.18-0.25mm. Center lines extend 3-5mm beyond features.
4. The scale 1:100 means:
Answer: C
1:100 scale means 1 unit on drawing = 100 units in reality. Thus 1cm=100cm (1m) and 1mm=100mm (10cm). Common scales: Site plans (1:500), Floor plans (1:100), Details (1:20 or 1:10).
5. The symbol represents:
Answer: B
The standard symbol for brickwork in section views consists of two lines of staggered hatches at 45°. Concrete is shown with dotted triangles, earth with irregular wavy lines, and sand with fine dots.
6. The dimension line should be drawn:
Answer: B
As per IS 10714, dimension lines should be 10-12mm from the object outline and 6-8mm apart from each other. Extension lines should extend 2-3mm beyond dimension lines.
7. The recommended arrowhead size for dimensioning is:
Answer: B
Standard arrowheads are 3mm long with 1:3 slope (width:length). Closed filled arrowheads are preferred. Alternative styles include oblique strokes or dots, but consistency is important.
8. In orthographic projection, the front view shows:
Answer: A
In first-angle orthographic projection (standard in India): Front view shows length (x) and height (z), top view shows length and width (y), side view shows width and height.
9. The standard scale for site plans is typically:
Answer: C
Site plans typically use 1:500 scale (1cm=5m). Larger scales (1:200 or 1:100) may be used for small sites, while 1:1000 or 1:2000 is used for large developments.
10. The symbol 'Ø' before a dimension indicates:
Answer: B
The 'Ø' symbol indicates diameter. Radius is shown by 'R', spherical diameter by 'SØ', and reference dimensions are enclosed in parentheses. These conventions are per ISO/IS standards.
Topic: Building Drawing
11. The minimum width of a residential staircase as per National Building Code is:
Answer: B
NBC recommends minimum 900mm width for residential staircases (1m for public buildings). Tread (going) should be 250-300mm and riser 150-180mm. Headroom ≥2.1m.
12. In a floor plan, the symbol represents:
Answer: B
The standard door symbol shows a quarter-circle arc indicating swing direction. Solid line represents wall, arc shows opening. Different line types distinguish single (one arc) vs double doors (two arcs).
13. The recommended height of window sill above floor level for residential buildings is:
Answer: C
Standard window sill height is 750-800mm for sitting view and furniture placement. Kitchen windows may be higher (900mm), while ventilation windows can be at 2000mm or higher.
14. The minimum thickness of RCC slab for residential buildings is:
Answer: B
Minimum slab thickness is 100mm (4") for residential buildings as per IS 456. Commercial buildings use 125-150mm. Span/depth ratio should be ≤30 for simply supported slabs.
15. The standard height of a door frame in residential buildings is:
Answer: C
Standard door height is 2.1m (7ft) in India. Widths vary: 900mm (main doors), 800mm (bedrooms), 700mm (bathrooms). Commercial buildings may use 2.4m doors.
16. The recommended scale for detailed drawings of building elements is:
Answer: C
Detailed drawings (stairs, windows, joints) typically use 1:20 scale. Larger scales (1:10 or 1:5) show finer details, while 1:50 is used for component drawings.
17. The minimum width of a corridor in residential buildings as per NBC is:
Answer: A
NBC specifies minimum 0.9m width for residential corridors. Public buildings require 1.8m (hospitals) or 2.4m (schools). Wider corridors improve accessibility and emergency egress.
18. The symbol represents:
Answer: A
The north arrow symbol indicates building orientation. It's typically shown in plan views with true north marked. Architectural drawings should always include north point for site orientation.
19. The minimum ceiling height for habitable rooms as per NBC is:
Answer: B
NBC specifies minimum 2.75m ceiling height for habitable rooms. Bathrooms/WCs may have 2.4m. Higher ceilings (3-3.5m) improve ventilation but increase construction costs.
20. The recommended scale for foundation plans is:
Answer: A
Foundation plans typically use 1:50 scale to show footing dimensions, reinforcement and depths clearly. Larger scales (1:20) may be used for complex foundations or details.
Topic: Structural Drawing
21. The symbol 'Y8-200 c/c' in reinforcement drawing indicates:
Answer: A
'Y8-200 c/c' means 8mm diameter mild steel bars (Fe250) spaced at 200mm center-to-center. 'Y' denotes mild steel (Fe250), 'c/c' means center-to-center spacing. High strength bars use 'H' (Fe415) or 'U' (Fe500).
22. The minimum concrete cover for reinforcement in slabs as per IS 456 is:
Answer: B
IS 456 specifies minimum cover: 20mm for slabs, 25mm for beams, 40mm for columns/footings exposed to earth. Additional 10mm should be added for marine environments or fire resistance.
23. The standard length of reinforcement bars supplied in India is:
Answer: C
Standard reinforcement bars are supplied in 12m lengths as per IS 1786. Some manufacturers may provide 6m or 9m lengths for smaller projects. Bars ≥32mm diameter may be supplied in 18m lengths.
24. The development length of reinforcement depends on:
Answer: C
Development length Lₐ = (φσₛ)/(4τₐ) where φ=bar diameter, σₛ=stress in bar, τₐ=average bond stress. As per IS 456, Lₐ = (φfₛ)/(4τₐ) where fₛ=0.87fᵧ for limit state design.
25. The symbol represents:
Answer: A
The rectangular loop symbol represents stirrups in beams. Spacing is shown as @150c/c etc. Different patterns indicate 2-legged, 4-legged or multi-legged stirrups based on beam width.
26. The minimum percentage of steel required in RCC slab as per IS 456 is:
Answer: A
Minimum steel in slabs is 0.12% of gross cross-section for Fe415 bars (0.15% for Fe250). Maximum is 4%. For temperature reinforcement, minimum is 0.12% for HYSD bars, 0.15% for mild steel.
27. The standard hook length for reinforcement bars is:
Answer: C
Standard hook length is 16φ (16×bar diameter) as per IS 2502. The bend diameter should be ≥4φ for mild steel and ≥8φ for high strength deformed bars. Hooks ensure proper anchorage.
28. The recommended scale for structural detailing of beams is:
Answer: B
Beam detailing typically uses 1:20 scale to show reinforcement layout, stirrup spacing and sectional details. Larger scales (1:10) may be used for complex connections or heavily reinforced beams.
29. The standard lap length for tension reinforcement in beams is:
Answer: D
As per IS 456, minimum lap length is 50φ (50×bar diameter) for tension bars. For compression, it's 40φ. Lap length increases for higher grade concrete or when bars are staggered.
30. The symbol '2-16φ' in column reinforcement drawing indicates:
Answer: A
'2-16φ' means two numbers of 16mm diameter bars. Column reinforcement is typically specified per face (e.g., 4-20φ means four 20mm bars on each face of a square column).