Drawing Fundamentals
1. The method of ________ projection is universally adopted for the purpose of engineering drawing.
A. Orthographic
B. Isometric
C. Oblique
D. Perspective
.
Answer: A
Explanation: By the orthographic projection method the description of the object regarding its shape and size is conveyed in such definite and unmistakable terms that it can be constructed as required. Isometric, Oblique and Perspective projection methods give the pictorial view, which shows only the outside appearance of a machine.
2. Single view may be enough to describe the shape of _______
A. Thick objects
B. Thin objects
C. Symmetric objects
D. Vertical objects
.
Answer: B
Explanation: For thin objects, one view is sufficient to describe the shape. Minimum two to three views are required for describing shape of the thick, symmetric and vertical objects.
3. Sectional views can be drawn to show the ____________
A. Hatching lines
B. Outside views
C. Internal details
D. Symmetric objects
.
Answer: C
Explanation: Sectional views are sometimes drawn to show the internal details, which are not possible in outside views. These sectional parts are shown by hatching lines.
4. While drawing an object on paper, which of the following method is not suitable regarding to its size?
A. Enlarge suitably if it is too small
B. Reduce if it is bigger than the paper size
C. Always should be drawn of the same size
D. Drawn of the same size if it can be accommodated on the paper
.
Answer: C
Explanation: It is not always possible to draw the object of given size. It is to be enlarged or reduced in size suitably for easy readability.
5. Which of the following is not a subtype of pictorial view?
A. Cabinet view
B. Auxiliary section view
C. Cavalier view
D. 3 vanishing point view
.
Answer: B
Explanation: Auxiliary section view is a type of section view. Cabinet view, Cavalier view and 3 vanishing point view are the subtypes of pictorial view.
6. _______ is an object seen by a human eye.
A. Perspective view
B. Axonometric view
C. Orthogonal view
D. Isometric view
.
Answer: A
Explanation: An object seen by a human eye is perspective view. In an orthographic view, the object is seen from different directions. The object is first rotated in horizontal plane about vertical axis to make an angle with the picture plane in Isometric view, which is a type of axonometric view.
7. In which of the following view the vanishing point is assumed to be located at infinity?
A. Perspective view
B. Orthographic view
C. Axonometric view
D. Perspective with one face of object parallel to the plane of picture
.
Answer: C
Explanation: Axonometric view drawn in such a way that the faces if an object is perpendicular to the line of sight and thus the vanishing rays are parallel and hence vanishing point are at infinity, in orthographic view there is no matter of vanishing point. A perspective view always meant to have a vanishing point at some point.
8. In which of the below given views, the picture plane is the same as the plane of the projection?
A. Pictorial view
B. Perspective view
C. Orthographic view
D. Oblique view
.
Answer: C
Explanation: Since an orthographic view is drawn by projecting the faces of an object on the required plane, thus plane of projection is parallel to the picture plane and lie in the picture plane. Since pictorial view are always drown with more than one face at one time thus cannot have picture plane as the plane of projection.
9. Projectors are referred to______________
A. Plane of projection
B. Picture plane
C. Rays intersecting the corner and edges of the object
D. Line of site
.
Answer: C
Explanation: Projectors are rays which intersect at the corner of an object and aligned along the edges of the object. They are not plane, so plane of projection and picture plane cannot be referred and line site is not known as projector.
10. A designer is looking to draw the side view of a car in perspective, which of the below given choice is the best?
A. Choosing vanishing points in the paper area
B. Choosing a single vanishing point at infinity
C. Choosing a three-point perspective
D. Choosing an orthographic view
.
Answer: B
Explanation: Generally two point or one point perspective is used to draw a car in perspective drawing; three-point perspective is used in architectural drawing. Since here side view is required, choosing a single vanishing point at infinity is going to give the best view.
11. The principal plane chosen in an orthographic view of a machine drawing is/are ______
A. Horizontal, vertical and side plane
B. Horizontal and side plane only
C. Vertical and horizontal plane only
D. Only vertical plane
.
Answer: A
Explanation: An orthographic view is drowned of the object using three main views i.e. top view, side view and a front view, so three principal plane is drown named horizontal, vertical and side plane. Top view is termed as plan, side view as profile and front view as elevation.
12. A pictorial view must show __________ of a machine.
A. All the details necessary for its construction
B. The outside appearance
C. True shape of the machine
D. All the faces of the machine
.
Answer: B
Explanation: A pictorial view is a view which is seen from an angle such that its three faces are visible. It shows only the outside appearance of a machine. It does not always show all the details necessary for its construction. It may not show even the true shape of the machine.
13. Side view is drawn by viewing from either the left or right side, whichever is __________
A. Easy to read
B. Suitable to draw
C. Having longest dimensions
D. More informative
.
Answer: D
Explanation: Side view could either be from the left or right side depending upon which side gives more details. Two side views can also be given if one side view does not cover all the details.
14. In perspective view, the object can be inclined at ______ angle.
A. 300
B. 450
C. 600
D. Any
.
Answer: D
Explanation: In perspective view, the object can be inclined at any angle. Generally, axonometric view is drawn at 300 and oblique view is drawn at 450.
15. Axonometric view is a type of _____________
A. Orthographic view
B. Pictorial view
C. Oblique View
D. Pictorial and Oblique View
.
Answer: B
Explanation: Views are classified as pictorial and orthographic view and the pictorial view is classified into three subgroups namely perspective axonometric, oblique and orthographic views. Axonometric view is that type of pictorial view in which the line of site is perpendicular to the picture plane.
16. In an axonometric view, line of site are ______________
A. Perpendicular to plane of projection with all three faces equally inclined to picture plane
B. Perpendicular to plane of projection with all three faces need not be equally inclined to picture plane
C. Inclined to the plane of projection at certain angle
D. One face of the object needs to be parallel
.
Answer: B
Explanation: An axonometric view is the type of pictorial view in which lines of the sight are perpendicular to the plane of projection. But all three faces need not be equally inclined to picture plane. The one with all three faces equally inclined to the picture plane is termed as isometric view.
17. The system in which variation in size is accepted is termed as ___________
A. Limit system
B. Tolerance System
C. Limit and tolerance system
D. Variable system
.
Answer: A
Explanation: In production line since it is impossible to make a part of exact drawing due to the inaccuracy of machine, setting and measurement thus some deviation is allowed in given maximum and minimum limit. The system in which this variation is accepted is termed as a Limit system and the allowable deviation are termed as tolerances.
18. What is the basic size?
A. Size calculated by the design engineer to withstand the stress coming in component
B. Size exactly of that of given object under consideration
C. Size of the object with given deviations
D. Size with which a job come out of the shop
.
Answer: A
Explanation: A design engineer calculate the size of an object using theory of failure and then give the size to the object with which an object of given material can withstand the stresses coming in the component, this size is termed as basic size. It is the size to which limits of tolerance are assigned.
19. What is the actual size?
A. Dimension of a component on paper
B. Dimension of the component manufactured
C. Size of the component as per theory of failure
D. Size of the object with all the tolerances
.
Answer: B
Explanation: The actual size the dimension obtained of a product when it is manufactured and come out of the shop. It may not be of the same size as given on the paper and comes in the dimension between the given tolerances. Simply the size of the manufactured component is actual size.
20. Tolerance is ___________
A. Difference between the basic size and maximum limit
B. Difference Between the minimum and basic size
C. Difference between the maximum and minimum limit size
D. The maximum size of the component allowed
.
Answer: C
Explanation: Tolerance is the difference between the maximum and minimum deviation that can be given to a component size thus tolerance is defined as the difference between the maximum and minimum limit size.
21. Cost of manufacturing is ____________
A. Inversely proportional to the amount of tolerance specified
B. Directly proportional to the amount of tolerance specified
C. Does not depends on tolerance specified
D. Does depends non-linearly
.
Answer: A
Explanation: Generally tolerance is provided in the narrow region, however, narrower the tolerance more difficult it is to manufacture a component thus the cost of manufacturing does depend on the tolerance specified and it is inversely proportional t0 the tolerance provided.
22. Dimensions given in a drawing are the scaled dimensions and not the actual dimensions of the object for scaled views.
A. True
B. False
.
Answer: B
Explanation: Dimensions given for scaled views are the actual dimensions of the object and not the scaled dimensions. Ratio or scale of that scaled dimension to the actual dimension is mentioned at the corner of drawing sheet.
23. As far as possible dimensions should be given in one unit, preferably in _______
A. Meters
B. Centimeters
C. Millimeters
D. Inches
.
Answer: C
Explanation: It is always preferred that the unit used for dimensions are mm (millimeters). Depending upon the size of the object meters or centimeters can also be used.
24. Addition of numerals on the drawing defines the object for ______
A. Shape
B. Size
C. Projections
D. Tolerances
.
Answer: B
Explanation: Addition of numerals on the drawing defines its size. Lines and curves represent the shape of the object and the numbers mentioned are the dimensions in mm.
25. Size is given by ________ for linear distances, radii, diameters, angles, etc.
A. Dimensions
B. Measurements
C. Arrows
D. Projections
.
Answer: A
Explanation: Size of the drawing is given by the dimensions for linear distances, radii, diameters, angles, etc. Size description is necessary for making a complete drawing.
26. Which of the following is the method of preparing drawing?
A. Machine drawing
B. Production drawing
C. Assembly drawing
D. Finished drawing
.
Answer: D
Explanation: Finished drawing is the only method of preparing drawings from the given choices. Machine drawing, Production drawing and Assembly drawing are the types of Mechanical drawings.
27. Output of CAD is not _________
A. Printed with a printer if it is small up to A4 size
B. Saved in the magnetic memory of the computer
C. Drawn on the paper with special drawing apparatus
D. Printed with multiple plotters if it is large
.
Answer: C
Explanation: In CAD, drawing is drawn on the screen of the computer using drawing software and not on the paper with a special drawing apparatus. It can be printed on a paper with a printer or plotter or can be stored in the magnetic memory.
28. While preparing a drawing with freehand sketching _______
A. Special apparatus are used to draw curves
B. Angles are drawn with a protractor
C. Straight lines are drawn with set square
D. Sketching is done without any aid of drawing apparatus
.
Answer: D
Explanation: Freehand sketching is used for expressing ideas only. It is a preliminary drawing and good for the understanding purpose. It is done with pencil and paper without any aid of the drawing apparatus.
29. CAD is the method of preparing drawings, which is an abbreviation of ______
A. Computer Aided Drafting
B. Call a Design
C. Completely Automated Designing
D. Common Application Data
.
Answer: A
Explanation: CAD is an abbreviation of Computer Aided Drafting. This is the latest method of drafting. CAD is the product of the computer era.
30. Which of the following statement is not about Computer Aided Drafting?
A. Quality of such drawing is excellent
B. Output is taken with the help of plotter or printer
C. Drawings are saved in the magnetic memory of the computer or hard disk
D. Letters are written using stencils for good appearance
.
Answer: D
Explanation: In CAD, the drawing is drawn on the screen of the computer using the software. Letters input to the software are directly printed on the paper and no need of stencils.
31. In a finished drawing, the appearance of the drawing does not depend upon the skill of the operator.
A. True
B. False
.
Answer: B
Explanation: Finished drawings are drawn with pencil or ink on paper or special drawing material with the aid of drawing apparatus for good draftsmanship. So, the quality and appearance of the drawing depend upon the skill of the person.
32. Which of the following option is not expressing the freehand sketch method of preparing drawing?
A. Sketching is done with pencil and paper
B. Lines may not be the exact length in such drawings
C. It is good in learning process
D. In sketching, circles are drawn with compass
.
Answer: D
Explanation: Sketching is done with paper and pencil without any aid of special drawing apparatus. It is a preliminary drawing and good for learning process only.
33. _________ is a drawing giving details about size tolerance, heat treatment, etc.
A. Exploded drawing
B. Production drawing
C. Assembly drawing
D. Machine drawing
.
Answer: B
Explanation: Production drawings also machine drawings. In addition to dimensions, they furnish tolerance, geometric tolerance, surface finish, heat treatment, etc. Production drawing mostly uses orthographic method of representation.
34. _________ is an authorized document to produce a part in the workshop.
A. Assembly drawing
B. Exploded drawing
C. Part drawing
D. Production drawing
.
Answer: D
Explanation: Production drawing gives all the design information required for the production process. It is provided by the design department to the production department as an authorized document to produce a part in the workshop. It gives information about allowances, surface finish, heat treatment, etc.
35. Drawing showing the position of each part with respect to each other is called _______
A. assembly drawing
B. part drawing
C. machine drawing
D. installation drawing
.
Answer: A
Explanation: Machine consists of many different parts. Assembly drawing is the drawing showing the position of each part with respect to each other. It can also be defined as a drawing showing all the parts in the combined state. It is prepared with the help of part drawings.
36. Exploded drawing is the drawing which gives the ____________ of each component of an assembly and they arranged in the same sequence in which they are assembled.
A. clear view
B. sectional view
C. pictorial view
D. front view
.
Answer: C
Explanation: Exploded drawing is the drawing which gives the pictorial view of each part of an assembly. They are arranged in the sequence in which they are assembled. Sometimes, it is difficult to read and interpret the working drawing correctly for a person in industry. Explodes drawing is useful in clearly visualizing different parts of assembly.
37. Detailed drawing of each part of a machine is called _________
A. part drawing
B. assembly drawing
C. patent drawing
D. tabular drawing
.
Answer: A
Explanation: A part drawing is a detailed drawing of each part of a machine. It is a production drawing of each part of a machine. Detailed drawing provides information about dimensions and allowances for the manufacture of the parts.
38. Production drawing of a part of a machine is also called a _______
A. working drawing
B. installation drawing
C. machine drawing
D. sub-assembly drawing
.
Answer: A
Explanation: Production drawing is also termed as a working drawing or a part drawing. It is a detail drawing of each part of a machine. These working drawing is quite useful for each step in the manufacturing industry.
39. Which type of drawing is supplied by the manufacturer to the client?
A. Tabular drawing
B. Assembly drawing
C. Client drawing
D. Installation drawing
.
Answer: D
Explanation: Installation drawings are the drawings supplied by the manufacturer to the client. It gives the overall dimensions of the assembly which may be needed at the time of installation. Details of foundation holes are an example of installation drawing.
40. Tabular drawings are used for parts that have __________
A. square shape
B. same size and same shape
C. same shape but different sizes
D. different shape but same size
.
Answer: C
Explanation: Tabular drawings are used for parts that have different dimension but same shape. In that case, the drawing can be dimensioned with sizes as P, Q, R, S, etc. The values of P, Q, R, and S can be tabulated in the table. Here dimensions of different parts are calculated by taking relative ratios directly.
41. Patent drawing must be in a pictorial view.
A. True
B. False
.
Answer: B
Explanation: Patent drawings are used to get a patent of a machine or machine component. The drawing may be in a pictorial view or in orthographic view as required for patent work depending on the complexity of the part. Both types of views can also be drawn if required.
42. ___________ is used to communicate information to industry.
A. design data
B. installation drawing
C. machine drawing
D. patent drawing
.
Answer: C
Explanation: Machine drawing is a drawing of machine elements. Design data may not be readable or easy to interpret to everyone in the industry and installation drawing gives overall dimensions of assembly. Hence, only machine drawing is used to communicate information to industry.
43. Working drawing is used by _______
A. production department
B. customer
C. marketing department
D. designer
.
Answer: A
Explanation: Working drawing is a detailed drawing of each part of a machine. It is used by the production department or manufacturing industry. Drawing made for a customer is an Installation drawing and machine drawing is used by other departments of the company.
44. To have uniformity in the drawings they are required to follow some drawing standards. These standards are available for drawing but not for any machine components.
A. True
B. False
.
Answer: B
Explanation: Standards are available for any machine components and also for drawings. To have uniformity in drawing, designer should follow some drawing standards approved by International Standards Organization (ISO). In India, BIS (Bureau of Indian Standards) has been assigned for standardizing the machine components for interchangeability of parts.
