Civil Engineering Drawing Topic-wise Questions for APSC JE Exam
Topic: Perspective Drawing
31. In a one-point perspective drawing, the lines converge at:
Answer: B
In one-point perspective, parallel lines appear to converge at a single vanishing point on the horizon line. This technique is used to depict depth, commonly for interiors or roads.
32. The horizon line in a perspective drawing represents:
Answer: A
The horizon line corresponds to the observer’s eye level. It determines the placement of vanishing points and affects the viewer’s perception of the scene’s depth.
33. A two-point perspective is most suitable for depicting:
Answer: B
Two-point perspective is ideal for showing building corners, where two sets of parallel lines converge at two vanishing points, creating a realistic 3D effect.
34. The station point in perspective drawing is:
Answer: A
The station point represents the observer’s position relative to the object and picture plane, determining the perspective view’s angle and depth.
35. The scale used for perspective drawings is typically:
Answer: A
Perspective drawings are not drawn to a fixed scale, as their purpose is to represent depth and visual realism rather than precise measurements.
Topic: Irrigation Drawing
36. The symbol for a sluice gate in irrigation drawings is represented as:
Answer: B
A sluice gate is depicted as a rectangle with diagonal lines in irrigation drawings, indicating the gate’s position in canal or dam cross-sections.
37. The standard scale for canal layout plans is:
Answer: C
Canal layout plans typically use a 1:1000 scale to show alignments, branches, and structures over large areas. Detailed sections may use 1:100 or 1:50.
38. The minimum side slope for an unlined canal in clayey soil is:
Answer: B
For unlined canals in clayey soil, a side slope of 1.5:1 (H:V) is recommended to ensure stability while maximizing capacity, as per IS 7112.
39. The purpose of a cross-regulator in a canal system is to:
Answer: B
A cross-regulator controls water levels in the main canal and its branches, ensuring proper distribution and preventing overflow or depletion.
40. In irrigation drawings, the contour lines indicate:
Answer: B
Contour lines show the elevation of the terrain, helping engineers design canal alignments to follow the natural slope for efficient water flow.
Topic: Road and Bridge Drawing
41. The standard width of a single-lane road as per IRC is:
Answer: B
As per IRC 73, the standard carriageway width for a single-lane road is 3.75m, allowing safe passage of vehicles without shoulders.
42. The symbol for a culvert in road drawings is typically shown as:
Answer: B
Culverts are represented as rectangles with cross-hatching in plan views, indicating the structure’s position and type (slab, pipe, or box).
43. The minimum radius of a horizontal curve for a national highway (design speed 80 km/h) is:
Answer: B
As per IRC 38, the minimum radius for a horizontal curve at 80 km/h is approximately 230m, considering superelevation and friction factors.
44. The standard scale for road alignment plans is:
Answer: C
Road alignment plans typically use a 1:1000 scale to depict centerlines, curves, and cross-drainage works over long stretches, per IRC guidelines.
45. The minimum clearance height for a road bridge over a national highway is:
Answer: C
IRC 5 specifies a minimum vertical clearance of 5.5m for road bridges over national highways to accommodate heavy vehicles safely.