Engineering Drawing Best 100 MCQ

Correct Answer: C. To visually communicate engineering ideas. Engineering drawings are used to clearly convey technical information.

Correct Answer: B. ISO. The International Organization for Standardization (ISO) sets global standards for engineering drawings.

Correct Answer: B. Dashed line. Dashed lines indicate hidden features that are not visible in a particular view.

Correct Answer: B. To differentiate types of boundaries and features. Different line types help represent various elements and their significance.

Correct Answer: C. Roman Single Stroke. Engineering drawings typically use Roman Single Stroke for clarity and uniformity.

Correct Answer: C. Compass. A compass is commonly used to draw circles and arcs in technical drawings.

Correct Answer: C. To draw straight lines. T-squares are used to draw horizontal lines and help align other drawing instruments.

Correct Answer: B. Protractor. A protractor is specifically designed for measuring and drawing angles.

Correct Answer: A. 210 x 297 mm. A4 sheets are commonly used and measure 210 x 297 mm.

Correct Answer: B. Designer’s name and date. The title block often contains the designer’s name, the date, and other relevant information about the drawing.

Correct Answer: C. Drawing a base line. Constructing a polygon often begins with drawing a baseline as a reference.

Correct Answer: A. Compass. A compass is commonly used to bisect angles by creating intersecting arcs.

Correct Answer: B. 5. A pentagon has five equal sides and angles in a regular configuration.

Correct Answer: B. Circle. A circle is formed by a point moving at a constant distance from a central point.

Correct Answer: B. Parabola. A parabola is created when a cone is cut by a plane parallel to one of its sides.

Correct Answer: C. Parabola. This definition describes a parabola, where the constant ratio is 1.

Correct Answer: C. To indicate curve transitions. Tangents help in smoothly connecting different curves in engineering drawings.

Correct Answer: D. By cutting a cone at an angle to both its base and side. This creates two separate curves called hyperbolas.

Correct Answer: D. Ellipsograph. An ellipsograph is a tool designed to accurately draw ellipses.

Correct Answer: C. 720 degrees. The sum of internal angles in a hexagon is calculated as (6-2) × 180 = 720 degrees.

Correct Answer: B. Orthographic. Orthographic projection uses two main types: first-angle and third-angle projections.

Correct Answer: B. Below the front view. In first-angle projection, the top view is placed below the front view.

Correct Answer: B. To depict an object from multiple perspectives. Orthographic projection shows different views (front, top, side) for accuracy.

Correct Answer: A. To the right of the front view. In third-angle projection, the right-side view is placed to the right of the front view.

Correct Answer: C. Sectional view. Sectional views reveal internal features by cutting through an object.

Correct Answer: D. Cutting plane line. Cutting plane lines show where the object is ‘cut’ to reveal internal details.

Correct Answer: B. Placement of views. First-angle projection places views differently from third-angle projection.

Correct Answer: C. Front view. The front view generally contains the most comprehensive details of the object.

Correct Answer: C. Full section. A full section cuts the object entirely to show all internal details.

Correct Answer: C. To indicate the direction of the cut. Hatching represents areas where material is cut.

Correct Answer: B. Isometric. Isometric projection shows a 3D view without perspective distortion, using equal angles for the axes.

Correct Answer: A. 30 degrees. In isometric projection, the angles between the projection axes are each 120 degrees, but the drawing is angled at 30 degrees from the horizontal.

Correct Answer: C. To maintain true dimensions along the axes. An isometric scale ensures that dimensions are proportionally correct in isometric projection.

Correct Answer: C. Trimetric. Trimetric projection uses different scales for each axis, making it less uniform but allowing more realistic depth representation.

Correct Answer: C. Two. In dimetric projection, two axes share the same scale, while the third axis uses a different scale.

Correct Answer: C. They become ellipses. Circles appear as ellipses in isometric projection due to the angle of view.

Correct Answer: A. Dimetric. Dimetric projection, with two equal angles, provides a realistic yet simplified 3D representation.

Correct Answer: D. It provides a realistic 3D view. Isometric projection visually represents an object in 3D, making it easier to understand.

Correct Answer: A. One. One-point perspective uses a single vanishing point to create depth.

Correct Answer: A. Oblique. Oblique projection uses parallel lines to create 3D depth and is often used in architectural drawings.

Correct Answer: C. On opposite sides of the object. Two-point perspective uses two vanishing points, typically on opposite sides of the object.

Correct Answer: B. Cavalier. Cavalier projection uses a 45-degree angle and shows depth at full scale, making it look distorted.

Correct Answer: B. Cabinet. Cabinet projection uses a 45-degree angle but reduces the depth scale to improve realism.

Correct Answer: B. To illustrate assembly instructions. Exploded views show how components fit together.

Correct Answer: C. Three-point perspective. Three-point perspective adds a third vanishing point for height.

Correct Answer: D. Partial section. A partial section only cuts through part of an object to reveal specific details.

Correct Answer: B. Half section. Half sections are used to display symmetrical interiors, showing half the object as solid and half as cut.

Correct Answer: A. Offset section. Offset sections are used to show features that are not aligned, by offsetting the cutting plane.

Correct Answer: B. The sequence of parts assembly. Exploded views help users understand how to assemble each component in sequence.

Correct Answer: C. Assembly view. Assembly views show how different parts fit together in complex machinery.

Correct Answer: A. Internal features. Exploded views focus on part relationships and assembly sequence, not internal features.

Correct Answer: C. To indicate cut surfaces. Hatching in sectional views shows where the object has been cut.

Correct Answer: B. Shaft. Break lines often represent shafts or other components too long to show in full.

Correct Answer: B. To define the size and location of features. Dimensioning provides essential information about the size and geometry of an object.

Correct Answer: C. Baseline dimensioning. Baseline dimensioning uses a common baseline to measure from, reducing errors in accumulation.

Correct Answer: B. A tolerance that only applies in one direction. Unilateral tolerances allow variation only in one direction.

Correct Answer: B. Geometric Dimensioning and Tolerancing. GD&T is a system that defines and communicates engineering tolerances.

Correct Answer: A. Diameter. The symbol $Ø$ indicates the diameter of a circle or hole.

Correct Answer: C. Limit tolerance. Limit tolerance specifies both upper and lower acceptable size limits for a feature.

Correct Answer: B. Unidirectional system. In the unidirectional system, all dimensions are written so they can be read from the bottom of the drawing.

Correct Answer: B. It provides precise control of form, orientation, and location. GD&T ensures better control over manufacturing tolerances.

Correct Answer: B. To reference a point or surface for measurements. Datums serve as the basis for measuring other features in GD&T.

Correct Answer: B. Reduced scale. Reduced scale is used to represent objects smaller than their actual size.

Correct Answer: A. Vernier scale. A vernier scale allows for precise measurement of small distances.

Correct Answer: B. A curve traced by a point on a circle rolling along a straight line. An involute is used in gear tooth design.

Correct Answer: C. Spiral. A spiral is generated by a point moving at a constant speed along a curve that continually increases its distance from the center.

Correct Answer: C. Enlarged scale. Enlarged scales are used to represent small objects at a larger size.

Correct Answer: C. Cycloid. Cycloid curves are commonly used in the design of cams and gears.

Correct Answer: C. To measure small distances accurately. Diagonal scales are used to measure minute dimensions with high precision.

Correct Answer: C. Rivet. Rivets are permanent fasteners commonly used in construction and mechanical applications.

Correct Answer: A. Bolt. Bolts are used for temporary joints because they can be removed and reused.

Correct Answer: B. To transmit torque between a shaft and a rotating element. Keys prevent relative motion between the two parts.

Correct Answer: B. Compression spring. Compression springs absorb energy and return to their original shape after being compressed.

Correct Answer: A. Universal coupling. Universal couplings allow for angular movement between two rotating shafts.

Correct Answer: D. Hexagon. A hexagon represents a bolt or nut in engineering drawings.

Correct Answer: B. To reduce friction between moving parts. Bearings allow for smooth rotation or linear movement in mechanical systems.

Correct Answer: B. Butt joint. Butt joints are commonly used in welding to join two components end-to-end.

Correct Answer: C. To unfold a 3D object into a 2D layout. Surface development shows the flat layout of a 3D object for fabrication.

Correct Answer: C. Cylinder. Cylinders are easier to develop because they unfold into a rectangle.

Correct Answer: C. Intersection line. Intersection lines indicate where two surfaces intersect or meet in a developed view.

Correct Answer: C. Parallel line development. Parallel line development is used to unfold the surfaces of prisms.

Correct Answer: C. An ellipse at the intersection. The intersection of two cylinders at right angles typically forms an elliptical curve.

Correct Answer: B. At the apex of the cone. Radial lines converge at the apex when unfolding a cone’s surface.

Correct Answer: D. Approximation method. Spheres are often developed using an approximation due to their curved surface.

Correct Answer: B. Computer Aided Design. CAD stands for Computer Aided Design, which is used for creating precise drawings and models.

Correct Answer: C. Circle tool. The circle tool in CAD software is used specifically to draw circles and arcs.

Correct Answer: B. To organize different elements of the drawing. Layers help organize and separate different parts of the drawing for easier editing and viewing.

Correct Answer: B. Rotate. The rotate command copies or moves an object around a specified pivot point at a given angle.

Correct Answer: B. Stretching a shape into the third dimension. Extrusion is the process of extending a 2D shape to create a 3D object.

Correct Answer: D. To ensure consistency and accuracy. CAD standards help maintain uniformity and accuracy in drawings.

Correct Answer: A. Array. The array feature duplicates objects in a specified pattern, creating multiple copies efficiently.

Correct Answer: A. A hidden feature. Dashed lines usually indicate hidden features or edges not directly visible in the view.

Correct Answer: D. Three horizontal lines with a descending line. This is the standard symbol for electrical grounding.

Correct Answer: C. Designer’s name, date, and drawing scale. Title blocks provide essential information about the drawing and its creator.

Correct Answer: B. To list all the symbols used in the drawing. Legends explain the meaning of symbols found in the blueprint.

Correct Answer: A. Zigzag line. Break lines often appear as zigzag lines to show where a section of the drawing is not included.

Correct Answer: C. The symmetry axis of an object. Centerlines indicate symmetry and often align with features like holes or shafts.

Correct Answer: C. To provide a layout of each floor’s rooms and features. Floor plans show the arrangement of spaces within a building.

Correct Answer: B. Chain line. Chain lines or thick solid lines with breaks indicate where an object is cut in sectional views.

Correct Answer: B. To provide detailed manufacturing information for individual parts. Fabrication drawings give precise instructions on how to manufacture each part.