10.1 Engineering drawings and its concepts
NEC LICENCE EXAM MCQ
10.1. ENGINEERING DRAWING AND ITS CONCEPT
MULTIPLE CHOICE QUESTIONS WITH SOLUTION
FUNDAMENTAL OF STANDARD DRAWING SHEET
Which of the following types of lines is used to represent hidden edges or features that are not visible in the current view?
A) Centerlines
B) Construction lines
C) Hidden lines
D) Extension lines
In orthographic projection, which view typically shows the true shape and size of an object's top surface?
A) Front view
B) Top view
C) Side view
D) Isometric view
Which of the following types of scales is used to represent objects in their actual size?
A) Architectural scale
B) Engineering scale
C) Full-scale
D) Comparative scale
Which type of dimensioning system uses a series of consecutive numbers and lines to indicate dimensions on an object?
A) Aligned dimensioning
B) Chain dimensioning
C) Unidirectional dimensioning
D) Baseline dimensioning
Which of the following is the standard paper size for engineering drawings in the United States?
A) A4
B) A3
C) Letter
D) Legal
What is the purpose of a title block in an engineering drawing?
A) To provide information about the scale of the drawing
B) To indicate the units of measurement used in the drawing
C) To identify the drawing with a title and number
D) To display the revision history of the drawing
Which type of projection is commonly used to represent objects with complex curved surfaces?
A) Isometric projection
B) Orthographic projection
C) Auxiliary projection
D) Sectional projection
Which of the following types of lines is used to indicate the boundaries of an object or its features?
A) Construction lines
B) Hidden lines
C) Object lines
D) Centerlines
Which of the following is a commonly used method for dimensioning circles and arcs in engineering drawings?
A) Radius dimensioning
B) Diameter dimensioning
C) Linear dimensioning
D) Angular dimensioning
Which of the following is NOT a commonly used projection method in engineering drawing?
A) Isometric projection
B) Orthographic projection
C) Perspective projection
D) Oblique projection
Solution:
C) Hidden lines
B) Top view
C) Full-scale
B) Chain dimensioning
C) Letter
C) To identify the drawing with a title and number
C) Auxiliary projection
C) Object lines
B) Diameter dimensioning
C) Perspective projection
DIMENSION SCALE IN DRAWING
In engineering drawing, which of the following scales is commonly used to represent small-sized objects or large areas?
A) Architectural scale
B) Engineering scale
C) Full-scale
D) Comparative scale
Which type of dimensioning system is commonly used to dimension cylindrical objects such as pipes or shafts?
A) Linear dimensioning
B) Radial dimensioning
C) Angular dimensioning
D) Chain dimensioning
Which of the following statements is true regarding the concept of tolerance in engineering drawing?
A) Tolerance is the permissible variation in the dimensions of an object.
B) Tolerance refers to the level of precision required in the drawing.
C) Tolerance is always represented as a positive value.
D) Tolerance is not applicable in engineering drawing.
Which type of dimension line indicates the distance between two parallel lines or planes in an engineering drawing?
A) Extension line
B) Leader line
C) Dimension line
D) Centerline
Which of the following is used to indicate that a surface is to be machined or finished to a specific roughness in an engineering drawing?
A) Surface finish symbol
B) Datum feature symbol
C) Counterbore symbol
D) Tolerance symbol
In engineering drawing, what is the purpose of a leader line?
A) To indicate a dimension's value
B) To indicate the location of a feature or note
C) To indicate the direction of an object's movement
D) To indicate the centerline of a symmetrical object
Which of the following types of dimensioning is commonly used to represent angles in engineering drawings?
A) Linear dimensioning
B) Radial dimensioning
C) Angular dimensioning
D) Chain dimensioning
Which of the following types of lines is used to indicate the theoretical or exact boundary of an object in an engineering drawing?
A) Hidden lines
B) Object lines
C) Centerlines
D) Cutting plane lines
In engineering drawing, what does the term "scale factor" refer to?
A) The size of the drawing sheet used for the drawing
B) The ratio between the size of the drawing and the actual object
C) The level of detail to be shown in the drawing
D) The thickness of lines in the drawing
Which of the following statements is true regarding the concept of scale in engineering drawing?
A) Scale determines the size of the drawing sheet used for the drawing.
B) Scale indicates the level of detail to be shown in the drawing.
C) Scale determines the relationship between the size of objects in the drawing and their actual size.
D) Scale is used to represent the thickness of lines in the drawing.
Solution:
A) Architectural scale
B) Radial dimensioning
A) Tolerance is the permissible variation in the dimensions of an object.
C) Dimension line
A) Surface finish symbol
B) To indicate the location of a feature or note
C) Angular dimensioning
B) Object lines
B) The ratio between the size of the drawing and the actual object
C) Scale determines the relationship between the size of objects in the drawing and their actual size.
LINE DIAGRAM
Which of the following types of lines is used to represent visible outlines or edges of an object in a line diagram?
A) Hidden lines
B) Object lines
C) Construction lines
D) Centerlines
In a line diagram, what does a dashed line usually indicate?
A) Hidden features or edges
B) Dimension lines
C) Cutting planes
D) Symmetry lines
Which type of line is used to represent the boundaries of an object when it extends beyond the drawing's limits?
A) Extension line
B) Leader line
C) Border line
D) Break line
What is the purpose of a break line in a line diagram?
A) To show the dimension of an object
B) To indicate symmetry in an object
C) To show a break or interruption in an object
D) To represent a hidden feature or edge
In a line diagram, which type of line is used to indicate the center of a circle or arc?
A) Hidden line
B) Centerline
C) Object line
D) Construction line
Which of the following is true regarding the thickness of lines in a line diagram?
A) All lines have the same thickness.
B) Hidden lines are thicker than object lines.
C) Object lines are thicker than hidden lines.
D) The thickness of lines varies depending on the drawing standards.
What type of line is used to indicate a revolved or symmetrical feature in a line diagram?
A) Cutting plane line
B) Phantom line
C) Hidden line
D) Section line
Which type of line is used to indicate the intersection of two surfaces in a line diagram?
A) Section line
B) Hidden line
C) Object line
D) Phantom line
In a line diagram, what does a dotted line usually indicate?
A) Construction features or auxiliary views
B) Cutting planes or sections
C) Centerlines or symmetry
D) Dimension lines or extensions
What is the purpose of a border line in a line diagram?
A) To indicate the limits of the drawing
B) To show the dimension of an object
C) To represent a hidden feature or edge
D) To highlight important features of the object
Solution:
B) Object lines
A) Hidden features or edges
D) Break line
C) To show a break or interruption in an object
B) Centerline
D) The thickness of lines varies depending on the drawing standards.
B) Phantom line
A) Section line
C) Centerlines or symmetry
A) To indicate the limits of the drawing
ORTHOGRAPHIC PROJECTION
What is the purpose of an orthographic projection in engineering drawing?
A) To show the three-dimensional form of an object
B) To represent an object in its true size and shape
C) To indicate the scale of the drawing
D) To provide sectional views of an object
In orthographic projection, which view is typically used to represent the true shape and size of an object's top surface?
A) Front view
B) Top view
C) Side view
D) Isometric view
What is the primary difference between the first-angle projection and the third-angle projection methods?
A) The orientation of the object in relation to the projection planes
B) The scale used for the drawing
C) The number of views required for complete representation
D) The use of different projection techniques for curved surfaces
Which of the following is true regarding the placement of views in orthographic projection?
A) The front view is always placed above the top view.
B) The top view is always placed above the front view.
C) The front view is always placed to the left of the top view.
D) The top view is always placed to the left of the front view.
In orthographic projection, what is the purpose of the hidden lines?
A) To indicate the dimensions of the object
B) To represent hidden or obscured features of the object
C) To show the location of holes or openings in the object
D) To indicate the direction of movement of the object
Which type of line is typically used to represent the edges or outlines of an object in orthographic projection?
A) Hidden line
B) Object line
C) Construction line
D) Centerline
Which of the following statements is true regarding the use of auxiliary views in orthographic projection?
A) Auxiliary views are used to show the internal features of an object.
B) Auxiliary views are always placed to the right of the front view.
C) Auxiliary views are used to show the object from a different angle or direction.
D) Auxiliary views are not commonly used in orthographic projection.
What is the purpose of dimension lines in orthographic projection?
A) To indicate the scale of the drawing
B) To show the relationship between different views of an object
C) To represent hidden or obscured features of the object
D) To indicate the dimensions of the object
In orthographic projection, what does the term "third-angle projection" refer to?
A) The position of the object in relation to the projection planes
B) The use of three different views to represent the object
C) The orientation of the object in relation to the observer
D) The use of three-dimensional isometric views for representation
Which type of view is typically used to represent the right side of an object in orthographic projection?
A) Front view
B) Top view
C) Right-side view
D) Isometric view
Solution:
B) To represent an object in its true size and shape
B) Top view
A) The orientation of the object in relation to the projection planes
D) The top view is always placed to the left of the front view.
B) To represent hidden or obscured features of the object
B) Object line
C) Auxiliary views are used to show the object from a different angle or direction.
D) To indicate the dimensions of the object
A) The position of the object in relation to the projection planes
C) Right-side view
ISOMETRIC PROJECTION
What is the purpose of an isometric projection in engineering drawing?
A) To show the three-dimensional form of an object
B) To represent an object in its true size and shape
C) To indicate the scale of the drawing
D) To provide sectional views of an object
In isometric projection, which angles are typically used to represent the three axes of the object?
A) 30°, 60°, 90°
B) 45°, 45°, 90°
C) 60°, 60°, 120°
D) 90°, 90°, 90°
Which of the following statements is true regarding the use of isometric projection?
A) Isometric projection is used to represent curved surfaces more accurately than other projection methods.
B) Isometric projection provides a realistic view of an object with a sense of depth and distance.
C) Isometric projection is limited to representing objects with symmetrical shapes.
D) Isometric projection is not commonly used in engineering drawing.
In isometric projection, which view typically represents the true shape and size of an object's front face?
A) Front view
B) Top view
C) Side view
D) Isometric view
What is the purpose of the isometric scale in isometric projection?
A) To indicate the scale of the drawing
B) To show the dimensions of the object
C) To represent hidden or obscured features of the object
D) To accurately represent the angles of the object's axes
Which type of line is typically used to represent the edges or outlines of an object in isometric projection?
A) Hidden line
B) Object line
C) Construction line
D) Centerline
Which of the following statements is true regarding the use of dimension lines in isometric projection?
A) Dimension lines are not used in isometric projection.
B) Dimension lines are used to indicate the scale of the drawing.
C) Dimension lines are used to indicate the dimensions of the object in isometric view.
D) Dimension lines are used to represent hidden or obscured features of the object.
What is the purpose of the auxiliary view in isometric projection?
A) To show the internal features of an object
B) To indicate the direction of movement of the object
C) To provide additional views of the object from different angles
D) To represent hidden or obscured features of the object
In isometric projection, what does the term "isometric scale" refer to?
A) The position of the object in relation to the projection planes
B) The ratio of the dimensions of the isometric view to the actual object
C) The orientation of the object in relation to the observer
D) The use of three-dimensional views for representation
Which type of view is typically used to represent the top face of an object in isometric projection?
A) Front view
B) Top view
C) Right-side view
D) Isometric view
Solution:
A) To show the three-dimensional form of an object
B) 45°, 45°, 90°
B) Isometric projection provides a realistic view of an object with a sense of depth and distance.
A) Front view
A) To indicate the scale of the drawing
B) Object line
C) Dimension lines are used to indicate the dimensions of the object in isometric view.
D) To represent hidden or obscured features of the object
B) The
PICTORIAL VIEW
What is the purpose of a pictorial view in engineering drawing?
A) To show the three-dimensional form of an object
B) To represent an object in its true size and shape
C) To indicate the scale of the drawing
D) To provide sectional views of an object
Which of the following types of pictorial views provides the most realistic representation of an object?
A) Isometric view
B) Perspective view
C) Oblique view
D) Orthographic view
Which of the following statements is true regarding the use of pictorial views?
A) Pictorial views are used to represent objects with complex geometry.
B) Pictorial views provide accurate dimensional information of an object.
C) Pictorial views are limited to representing objects with symmetrical shapes.
D) Pictorial views are not commonly used in engineering drawing.
In a perspective view, what characteristic gives the impression of depth and distance?
A) Use of parallel projection
B) Use of isometric scale
C) Use of foreshortening
D) Use of hidden lines
What is the purpose of the vanishing point in a perspective view?
A) To indicate the scale of the drawing
B) To represent hidden or obscured features of the object
C) To accurately represent the angles and foreshortening of the object
D) To provide a point of reference for the placement of the object
Which type of line is typically used to represent the edges or outlines of an object in a perspective view?
A) Hidden line
B) Object line
C) Construction line
D) Centerline
Which of the following statements is true regarding the use of dimension lines in pictorial views?
A) Dimension lines are not used in pictorial views.
B) Dimension lines are used to indicate the scale of the drawing.
C) Dimension lines are used to indicate the dimensions of the object in the pictorial view.
D) Dimension lines are used to represent hidden or obscured features of the object.
What is the purpose of foreshortening in a pictorial view?
A) To show the dimensions of the object accurately
B) To represent hidden or obscured features of the object
C) To provide a sense of depth and distance in the view
D) To indicate the direction of movement of the object
In a perspective view, what does the term "horizon line" refer to?
A) The position of the object in relation to the projection planes
B) The line where the sky and ground appear to meet in the view
C) The orientation of the object in relation to the observer
D) The use of three-dimensional views for representation
Which type of view provides a pictorial representation where the front face of the object is parallel to the picture plane?
A) Isometric view
B) Perspective view
C) Oblique view
D) Orthographic view
Solution:
A) To show the three-dimensional form of an object
B) Perspective view
A) Pictorial views are used to represent objects with complex geometry.
C) Use of foreshortening
C) To accurately represent the angles and foreshortening of the object
B) Object line
C) Dimension lines are used to indicate the dimensions of the object in the pictorial view.
C) To provide a sense of depth and distance in the view
B) The line where the sky and ground appear to meet in the view
C) Oblique view
SECTIONAL DIAGRAM
What is the purpose of a sectional diagram in engineering drawing?
A) To show the three-dimensional form of an object
B) To represent an object in its true size and shape
C) To indicate the scale of the drawing
D) To provide a detailed view of the internal structure of an object
Which of the following types of lines is commonly used to represent the cutting plane in a sectional diagram?
A) Hidden line
B) Object line
C) Section line
D) Extension line
In a sectional diagram, what does the hatch pattern on the sectioned area represent?
A) The material of the object
B) The direction of light
C) The scale of the drawing
D) The thickness of the object
Which of the following statements is true regarding the use of sectional diagrams?
A) Sectional diagrams are used to represent objects with symmetrical shapes.
B) Sectional diagrams provide a realistic view of an object with a sense of depth and distance.
C) Sectional diagrams are limited to representing objects with simple geometry.
D) Sectional diagrams are used to show the internal features of an object.
What is the purpose of dimension lines in a sectional diagram?
A) To indicate the scale of the drawing
B) To show the relationship between different sections of the object
C) To represent hidden or obscured features of the object
D) To indicate the dimensions of the object in the sectioned view
Which type of line is typically used to represent the edges or outlines of an object in a sectional diagram?
A) Hidden line
B) Object line
C) Construction line
D) Centerline
Which of the following statements is true regarding the use of cutting plane lines in a sectional diagram?
A) Cutting plane lines are used to indicate the scale of the drawing.
B) Cutting plane lines are used to represent hidden or obscured features of the object.
C) Cutting plane lines are used to show the direction of movement of the object.
D) Cutting plane lines are used to define the location and extent of the sectioned area.
What is the purpose of the arrowheads on a sectional diagram?
A) To indicate the scale of the drawing
B) To represent hidden or obscured features of the object
C) To show the direction of the sectioned view
D) To indicate the dimensions of the object in the sectioned view
In a sectional diagram, what does the term "section line" refer to?
A) The position of the object in relation to the projection planes
B) The line representing the cutting plane
C) The orientation of the object in relation to the observer
D) The use of three-dimensional views for representation
Which type of view is typically used to represent the sectioned view of an object in a sectional diagram?
A) Front view
B) Top view
C) Section view
D) Isometric view
Solution:
D) To provide a detailed view of the internal structure of an object
C) Section line
A) The material of the object
D) Sectional diagrams are used to show the internal features of an object.
D) To indicate the dimensions of the object in the sectioned view
A) Hidden line
D) Cutting plane lines are used to define the location and extent of the sectioned area.
C) To show the direction of the sectioned view
B) The line representing the cutting plane
C) Section view