Engineering Drawing and CAD: Master the Fundamentals for Mechanical Engineering

Question 1

Which of the following projection views is NOT an orthographic projection?

Accepted Answer

Isometric view

Answer

Plan view

Answer

Elevation view

Answer

Sectional view

Question 2

What type of line is used to represent hidden edges in engineering drawings?

Accepted Answer

Dashed line

Answer

Solid line

Answer

Dotted line

Answer

Center line

Question 3

Which tolerance type specifies a range of acceptable values for a dimension on one side of the nominal value?

Accepted Answer

Unilateral tolerance

Answer

Bilateral tolerance

Answer

Geometric tolerance

Answer

Datum tolerance

Question 4

What is the primary function of using a datum in engineering drawings?

Accepted Answer

To define the origin of a dimension

Answer

To indicate the surface to be machined first

Answer

To specify the tolerance for a dimension

Answer

To show the direction of assembly

Question 5

Which CAD software feature is used to create 3D models by extending a 2D sketch?

Accepted Answer

Extrusion

Answer

Sketching

Answer

Assembly

Answer

Dimensioning

Question 6

What is the key advantage of using parametric modeling in CAD?

Accepted Answer

Changes made to the model are automatically updated throughout the drawing.

Answer

It simplifies the creation of complex shapes.

Answer

It reduces the file size of the drawing.

Answer

It enables non-destructive editing.

Question 7

What is the primary purpose of a bill of materials (BOM) in engineering drawings?

Accepted Answer

To list the components and materials used in the assembly.

Answer

To provide instructions for assembling the components.

Answer

To specify the dimensions of the components.

Answer

To show the location of the components in the assembly.

Question 8

Which of the following topics is NOT included in the Engineering Drawing and CAD unit?

Accepted Answer

Fluid dynamics

Answer

Orthographic projection

Answer

Computer-aided design (CAD)

Question 9

Which GD&T symbol is used to indicate a flatness tolerance on a surface?

Accepted Answer

Circle with a horizontal line

Answer

Bullseye

Answer

Downward arrow

Answer

Square

Question 10

In an assembly drawing, which type of line is used to represent the central axis of rotation for a part?

Accepted Answer

Centerline

Answer

Hidden line

Answer

Extension line

Answer

Dimension line

Question 11

Which CAD command removes excess material from a 3D model by cutting along specified edges or surfaces?

Accepted Answer

Trim

Answer

Extrude

Answer

Fillet

Answer

Chamfer

Question 12

Which of the following is NOT a type of orthographic projection?

Accepted Answer

Isometric view

Answer

Plan view

Answer

Elevation view

Answer

Sectional view

Question 13

What is the primary purpose of dimensioning in engineering drawings?

Accepted Answer

To indicate the location and size of features

Answer

To specify the surface finish of components

Answer

To identify the materials used in construction

Answer

To show the assembly sequence of components

Question 14

What type of tolerance specifies a range within which a dimension may vary?

Accepted Answer

Bilateral tolerance

Answer

Unilateral tolerance

Answer

Geometrical tolerance

Answer

Limit dimensioning

Question 15

Which of the following CAD software features allows for the creation of 3D models?

Accepted Answer

Extrusion

Answer

Sketching

Answer

Dimensioning

Answer

Annotation

Question 16

What is the term for a graphical representation of an object's position, size, and shape?

Accepted Answer

Orthographic projection

Answer

Blueprint

Answer

Diagram

Answer

Schematic

Question 17

Which of the following is NOT a benefit of using CAD software in engineering design?

Accepted Answer

Elimination of the need for manual drafting skills

Answer

Improved accuracy and precision

Answer

Faster design iterations

Answer

Reduced need for physical prototypes

Question 18

What is the primary purpose of a sectional view in an engineering drawing?

Accepted Answer

To show the interior features of an object

Answer

To provide assembly instructions

Answer

To indicate the materials used in construction

Answer

To specify the dimensions of an object

Question 19

Which of the following is a type of line used in engineering drawings to indicate hidden features?

Accepted Answer

Chain line

Answer

Continuous bold line

Answer

Dashed line

Answer

Dot-dashed line

Question 20

What is the term for the process of converting a 2D drawing into a 3D model?

Accepted Answer

Extrusion

Answer

Sweeping

Answer

Revolution

Answer

Loft

Question 21

Which of the following is NOT a type of orthographic projection?

Accepted Answer

Perspective View

Answer

Plan View

Answer

Elevation View

Answer

Sectional View

Question 22

What is the primary purpose of dimensioning in engineering drawings?

Accepted Answer

To convey the size and shape of the object

Answer

To provide assembly instructions

Answer

To calculate the volume of the object

Answer

To improve the aesthetic appeal of the drawing

Question 23

Which of the following CAD file formats is commonly used for storing 3D models?

Accepted Answer

.stl

Answer

.dwg

Answer

.dxf

Answer

.pdf

Question 24

What is the purpose of a cross-sectional drawing?

Accepted Answer

To show the internal features of an object

Answer

To provide a top view of the object

Answer

To indicate the materials used in an object

Answer

To determine the weight of an object

Question 25

What is the difference between a scale drawing and a full-size drawing?

Accepted Answer

A scale drawing is smaller than the actual object, while a full-size drawing is the same size as the object

Answer

A full-size drawing is smaller than the actual object, while a scale drawing is the same size as the object

Answer

There is no difference between a scale drawing and a full-size drawing

Answer

Both scale drawings and full-size drawings are larger than the actual object

Question 26

What is the purpose of using a datum in engineering drawing?

Accepted Answer

To establish a reference point for dimensioning

Answer

To indicate the center of an object

Answer

To show the location of a feature

Answer

To improve the readability of a drawing

Question 27

What is the term given to the process of creating a technical drawing that uses geometric principles?

Accepted Answer

Orthographic projection

Answer

Isometric projection

Answer

Dimensioning

Answer

Tolerancing

Question 28

Which of the following is NOT a type of orthographic projection commonly used in engineering drawings?

Accepted Answer

Isometric view

Answer

Plan view

Answer

Front view

Answer

Side view

Question 29

What is the main difference between a solid model and a surface model in CAD?

Accepted Answer

Solid models represent the internal structure of an object, while surface models only represent the exterior surfaces.

Answer

Surface models are more accurate than solid models.

Answer

Solid models are more computationally intensive to create than surface models.

Answer

Solid models can be used for simulations and analysis, while surface models cannot.

Question 30

In CAD software, which command is used to create a 3D model by rotating a 2D shape around an axis?

Accepted Answer

Revolve

Answer

Extrude

Answer

Loft

Answer

Sweep

Question 31

What is the primary purpose of tolerancing in engineering drawings?

Accepted Answer

To specify the allowable variation in a dimension.

Answer

To indicate the surface finish of a component.

Answer

To provide information about the material used.

Answer

To show the assembly sequence.

Question 32

What is the main difference between a first-angle projection and a third-angle projection?

Accepted Answer

The views are arranged differently on the drawing.

Answer

The object is projected onto different planes.

Answer

The object is viewed from different angles.

Answer

There is no difference.

Question 33

Which of the following is NOT a common file format used for CAD drawings?

Accepted Answer

PNG

Answer

DWG

Answer

DXF

Answer

STL

Question 34

What is the primary function of a datum in a dimensioned drawing?

Accepted Answer

To establish a reference point for dimensions.

Answer

To indicate the overall size of the component.

Answer

To show the location of hidden features.

Answer

To provide information about the material used.

Question 35

Which of these views is NOT typically part of a standard orthographic projection?

Accepted Answer

Isometric View

Answer

Front View

Answer

Top View

Answer

Side View

Question 36

In engineering drawings, what does the term 'tolerance' represent?

Accepted Answer

The allowed variation in a dimension.

Answer

The type of material used for the component.

Answer

The surface finish of the component.

Answer

The overall size of the component.

Question 37

Which CAD feature is used to create a mirrored copy of an object?

Accepted Answer

Mirror

Answer

Array

Answer

Offset

Answer

Fillet

Question 38

What does the acronym 'CAD' stand for in the context of engineering?

Accepted Answer

Computer-Aided Design

Answer

Computerized Analysis and Drafting

Answer

Computer-Assisted Drawing

Answer

Complex Architectural Design

Question 39

What is the primary purpose of a section view in a technical drawing?

Accepted Answer

To reveal the internal features of an object.

Answer

To specify the material of the object.

Answer

To indicate the surface finish of a part.

Answer

To show the object in three dimensions.

Question 40

In CAD, which feature is used to create rounded corners between two lines or arcs?

Accepted Answer

Fillet

Answer

Trim

Answer

Offset

Answer

Chamfer

Question 41

What is the name of the symbol used to indicate the diameter of a circle in engineering drawings?

Accepted Answer

⌀

Answer

∠

Answer

R

Answer

□