How many battens will be there for a Drawing board?
a) 1
b) 2
c) 3
d) 4
Answer: b
Explanation: Generally drawing board has dimensions of 1000 x 1500, 700 x 1000, 500 x 700, 350 mm x 500 mm, and made of well-seasoned soft wood, so there would be no bending while life increases. And also if a size of drawing board increases widely then the board will be fabricated with another 1 or 2 battens.
The part that doesn’t belong to T-square is __________
a) Working edge
b) Blade
c) Stock
d) Ebony
Answer: d
Explanation: Working edge and Stock are parts of T- square those which make 90 degrees with each other, the blade is the long bar that exists in T-Square. Ebony is part of Drawing board in which T-square is fitted to draw lines.
The angle which we can’t make using a single Set-square is ________
a) 45o
b) 60o
c) 30o
d) 75o
Answer: d
Explanation: 45o can be drawn using 45o Set-square, and 30o, 60o can be drawn using 30o – 60o Set-square, but to draw 75o degrees we need both Set-squares. That is only if we keep 30o of set-square adjacent with 45o set-square we can get 75o. And also multiple angles can be achieved using protractor.
The angle which we can’t make using both the Set-squares is _____________
a) 15o
b) 105o
c) 165o
d) 125o
Answer: d
Explanation: 15o can be made by keeping 45o and 30o adjacent to each other on the line perpendicular to the line for which 15ois made. Likewise for 105o and 165o also if we just change the alignment with the required line it possible. But to make 125o there is no such combination available for Set-squares.
Small bow compass can draw circles less than _____ mm radius.
a) 25mm
b) 30mm
c) 35mm
d) 40mm
Answer: a
Explanation: A normal Small bow compass is capable of drawing circles less than the 25mm radius. This is because of the arrangement of a screw in between the legs of the compass. But any other normal compass can’t give us perfect circles whose radius is less than 25mm.
Which is not the use of divider?
a) To divide curved or straight lines into the desired number of equal parts
b) To draw circles
c) To transfer dimensions from one part of the drawing to another part
d) To set-off given distances from the scale to the drawing
Answer: b
Explanation: Divider can be used for those purposes as mentioned in options. But we cannot use divider as a compass and even if we want the compass to be used as divider we can change the pencil part with needle attachment.
The cardboard scales are available in a set of _______ scales.
a) six
b) ten
c) eight
d) twelve
Answer: c
Explanation: The cardboard scales are available in a set of eight scales. They are designated from M1 to M8 which has scale of 1:1, 1:2.5, 1:10, 1:20, 1:50, 1:200, 1:300, 1:400, and 1:1000. These are standard scales used.
_________ is used to draw curves which are not circular.
a) Compass
b) Protractor
c) French curves
d) Pro circle
Answer: c
Explanation: French curves are used for drawing curves which can’t be drawn with a compass. A faint freehand curve is first drawn through the known points. Longest possible curves exactly coinciding with the freehand curve are then found out from the French curve. Finally, a neat continues curve is drawn with the aid of the French curve.
The areas of the two subsequent sizes of drawing sheet are in the ratio ____
a) 1:5
b) 1:4
c) 1:2
d) 1:10
Answer: c
Explanation: A successive format size (from A0 to A5) is obtained by halving along the length or doubling along the width. So the areas of the two subsequent sizes are in the ratio 1:2. Likewise in reverse order (from A5 to A0), the ratio will be 2:1.
What is the next size of 210 mm x 297 mm in drawing papers?
a) 148 mm x 210 mm
b) 297 mm x 420 mm
c) 420 mm x 594 mm
d) 105 mm x 148 mm
Answer: b
Explanation: 210 mm x 297 mm is A4 size, next one is A3 (297 mm x 420 mm), which came doubling along the width. And the next size is obtained by doubling the width i.e. A2 (420 mm x 594mm) and so on.
The Grade becomes ______ according to the figure placed in front of the letter B, 2B, 3B, 4B etc.
a) harder
b) lighter
c) darker
d) softer
Answer: d
Explanation: The increase in hardness is shown by the value of the figure put in front of the letter H, 2H, 3H, and 4H etc. Similarly, the grade becomes softer according to the figure placed in front of the letter B, 2B, 3B, and 4B etc.
Which of the following instrument is made of thin strips of wood arranged in a line to form a rectangle and on which, the drawing is made?
a) Mini – drafter
b) Drawing Board
c) Protractor
d) Scale
Answer: b
Explanation: The drawing board is made up of thin sheets of seasoned softwood, arranged in a line so as to form a rectangle. Then it is fitted with two battens on the respective parallel sides of the board. The battens are attached with the help of screws.
Which of the following instrument is used to draw circles with more than 150mm radius accurately?
a) Compass
b) Small bow compass
c) Lengthening bar
d) Big bow compass
Answer: c
Explanation: When the circle has a radius larger than 150mm, then using compass may not give the accurate drawing, hence we need to use lengthening bar.
For drawing arcs of radius less than 25mm, which of the following instrument is used?
a) Compass
b) Small bow compass
c) Big bow compass
d) Lengthening bar
Answer: b
Explanation: As it is not possible to draw quality circles with a radius less than 25mm using a compass, hence small bow compass.
Keeping one leg of the compass straight what is the maximum diameter of the circle that can be drawn?
a) 100mm
b) 120mm
c) 300mm
d) 360mm
Answer: b
Explanation: Compass is the drawing instrument used to draw circles and arcs. By keeping one leg with sharp-pointed end straight and the other leg can go to the extent of 120mm, hence the maximum diameter of the circle that can be drawn with the given condition is 120mm.
For what purpose the lead is sharpened to the conical point?
a) To draw long thin lines with uniform thickness
b) To draw long thin lines with non-uniform thickness
c) For sketch works and lettering
d) For drawing thick lines with non-uniform thickness
Answer: c
Explanation: While drawing sharpening the pencil and uniformity are important. Depending on the usage pencils are sharpened to different shapes. Conical point shape is used to sketch and lettering works.
For what purpose the lead is sharpened to chisel point?
a) To draw long thin lines with uniform thickness
b) To draw long thin lines with non-uniform thickness
c) For sketch works and lettering
d) For drawing thick lines with non-uniform thickness
Answer: a
Explanation: The shape of the pencil lead the pointing of the pencil changes the quality of the drawing. Depending on the usage pencils are sharpened to different shapes. Chisel point shape is used for drawing uniform thickness thin lines.
A mini drafter helps in __________
a) Drawing parallel and perpendicular lines
b) Drawing smooth curves
c) Drawing circles
d) Measuring the length of a curve
Answer: a
Explanation: The mini drafter is a device which combines the functions of a T-square, protractor, set square and scale. We can’t draw curves or circles with the help of mini drafter.
The leader lines are used to indicate _________
a) Dimensions of the feature
b) Pinpoint a location
c) Indicate a surface
d) To mark the center of small circles
Answer: b
Explanation: They are drawn usually at an angle to the representation and touch the feature with an indication of an arrow.
Which of the following is pencil grade is used in general for lettering and object lines?
a) F
b) H
c) B
d) 4H
Answer: b
Explanation: In manual drawings medium grade pencils are used in general and hard grade are used for construction lines. For lettering and object lines we use H grade pencils. Grades generally indicate the hardness of the lead, the harder the lead the lighter the mark left.
What is the use of T-squares in the manual drawing?
a) To draw curves
b) To draw concentric circles
c) To draw horizontal and vertical lines
d) To hold the sheet
Answer: c
Explanation: T-square is used in manual drawing to draw horizontal, vertical and diagonal lines. The horizontal part of T is used as a working edge which is used to draw lines on the sheet. It is generally made of wood or plastic and has a shape T.
In the drawing sheet which side of the borderlines more space is kept for the purpose of filing or binding when possible?
a) Left-hand side
b) Topside
c) Right-hand side
d) Bottom side
Answer: a
Explanation: Borderlines are drawn in the drawing to clearly specify working space. While drawing borderlines, for filing or binding the drawings some extra space is left on the left-hand side of the drawing sheet.
For the sheets A0 and A1, what is the width of the border?
a) 10mm
b) 20mm
c) 15mm
d) 5mm
Answer: b
Explanation: Borderlines are drawn in the drawing to clearly specify working space. For the sheets of designation A0 and A1, we keep the border width as 20mm as per the B.I.S recommendations.
Which of the following is used for positioning of the drawing sheet on the drawing board?
a) The grid system
b) Borders
c) Orientation marks
d) Folding marks
Answer: c
Explanation: On the drawing sheet four orientation marks are made for the correct positioning on the drawing board for the purpose of reproduction. The orientation mark made on the drawing sheet coincides with the drawing board and helps incorrect positioning of the sheet.
After folding the sheet what is visible on the top?
a) Drawing
b) Dimensions
c) Title box
d) Alterations
Answer: c
Explanation: Drawings are folded for securing them; they are folded in two ways. One is used when the drawings are filed and the other when they are stored in cabinets. In both cases after folding the drawing sheet, the title box is visible on the top.
How is the line-group is designated?
a) As per the thickness of the thickest line
b) As per the length of the given lines
c) As per the color of the given lines
d) As per the lines are drawn at a point
Answer: a
Explanation: Various lines have various thicknesses. For the given lines concerning the thickest line, lines are grouped as per the line thickness. They are called line-groups.
In a finished drawing drawn with pencil, what are the features of the lines except for construction lines?
a) Dense and thin
b) Dense and clean
c) Faint and clean
d) Faint and very thin
Answer: b
Explanation: The final pencil drawings are having two types of line groups. All lines are expected to be dense and clean except the construction lines.
In a finished drawing drawn with pencil, what are the features of the construction lines?
a) Dense and thin
b) Dense and clean
c) Faint and clean
d) Faint and very thin
Answer: d
Explanation: The final pencil drawings are having two types of line groups. Construction lines are expected to be very thin and faint, as they are just drawn for supporting the main drawing lines.
Which of the following pencil grades are used to draw construction lines?
a) H
b) 2H
c) 3H
d) 4H
Answer: a
Explanation: Construction lines should be faint and very thin, as they are just the supporting lines to ease the drawing of main lines. So an H grade of the pencil is used for this purpose.
Which of the following pencil grades are used to draw outlines?
a) H
b) 2H
c) 3H
d) 4H
Answer: b
Explanation: Outlines should be dense and clean, as they are the most important part of the drawing. So a 2H grade of a pencil is used for this purpose.
Which of the following pencil grades are used to draw dotted lines?
a) H
b) 2H
c) 3H
d) 4H
Answer: b
Explanation: Dotted lines should be clear, as they are the supporting part of the drawing, they make the complete view of the drawing. So a 2H grade of a pencil is used for this purpose.
Which of the following pencil grades are used to draw center lines?
a) H
b) 2H
c) 3H
d) 8H
Answer: c
Explanation: Centre lines should be visible, as they have an important part while drawing cylinders and solids of symmetry. So a 3H or 4H grade of a pencil is used for this purpose.
Which of the following pencil grades are used to draw section lines?
a) H
b) 2H
c) 3H
d) 8H
Answer: c
Explanation: Section lines should be visible, as they are the lines that section the given drawings. So a 3H or 4H grade of a pencil is used for this purpose.
Which of the following pencil grades are used for arrowhead?
a) H
b) 2H
c) 3H
d) 4H
Answer: b
Explanation: Arrowheads are more important when representing a dimension, they should be visible. And their length to width ratio should be 3:1. So a 2H grade of a pencil is used for this purpose.
Which of the following pencil grades are used to draw dimension lines?
a) H
b) 2H
c) 3H
d) 4H
Answer: b
Explanation: Dimension lines should be clean, clear and visible, as they are more important when the drawings go into the production phase. So a 2H grade of a pencil is used for this purpose.
The size of the title block is ________ mm x ________ mm.
a) 25 x 10
b) 100 x 25
c) 65 x 185
d) 185 x 65
Answer: d
Explanation: The size of the title block is 185mm x 65 mm which is recommended by B.I.S. (Bureau of Indian Standards), where 25mm x 10mm is for scale in drawing sheet. Within the title box, there will be so many sections divided like Name of the firm, Drawing No, Title, etc.
Isometric grid paper has horizontal lines and lines inclined _____ to the horizontal.
a) 30°
b) 45°
c) 90°
d) 60°
Answer: a
Explanation: Isometric sketch is one of the pictorial sketching, which is somewhat more complex to sketch than oblique sketching. It is easy to sketch when we use Isometric grid paper, where we have horizontal lines and lines inclined 30° to the horizontal lines.
The general angle range made by the receding construction lines with the horizontal axis of the sketch is ________
a) 30° to 45°
b) 10° to 45°
c) 30° to 90°
d) 30° to 60°
Answer: a
Explanation: The receding construction are drawn into the paper plane making the 2D sketch into a 3D sketch, they are drawn parallel to each other and makes an angle of 30° to 45° with the horizontal plane. They are drawn to the appropriate depth of the sketch.
What are the lines used at the first stage of free-hand sketching an object?
a) Thin construction lines
b) Dark lines
c) Dotted and dark lines
d) Thick lines
Answer: a
Explanation: In free-hand sketching, first we begin we the rough outline of the object using very light and thin lines which are called construction lines. Construction lines guide the one who is sketching to the final sketch with ease. They are very important in the beginning stage of the sketch.
Initial work and construction lines are drawn using __ pencil.
a) 3H
b) 4H
c) H
d) 2H
Answer: c
Explanation: Initial work and construction lines are drawn using H pencil. 2H pencil is used for outlines, dotted lines, dimension lines and arrowheads. 3H, 4H are used for centre lines and section lines.
Centre lines, section lines are drawn using __ pencil.
a) H
b) 2H
c) 3H or 4H
d) HB
Answer: c
Explanation: Centre lines, section lines are drawn using 3H or 4H pencil. Outlines, dotted lines, section-plane lines, dimension lines and arrow heads are drawn using 2H. These different pencils give different shades which give different importance to lines in drawing.
Drawing pencils are graded according to increase in relative __________
a) diameter
b) sharpness
c) length
d) hardness
Answer: d
Explanation: Drawing pencils are graded according to the increase in relative hardness. They are marketed with the labeled as H, 2H, 3H, 4H, 5H, 6H etc. These grades are used for getting accurate, clean and neat drawings.
In engineering drawing, which type of line indicates that there is a change of plane?
a) Continuous thin wavy
b) Long chain thin
c) Continuous thick
d) Medium thick short dashes
Answer: c
Explanation: In engineering drawing, a change of plane is indicated by drawing continuous thick lines. Continuous thin lines are used for indicating dimension line, hatching line, revolved section, etc. Long chain lines are used to indicate center line, cutting lines.
The axis of the cylinder or sphere is denoted by which of the following line?
a) Section line
b) Centre line
c) Hidden line
d) Leader line
Answer: b
Explanation: Centre line shows the axis of the cylinder or sphere. These lines generally pass through the centre of the circle. For a cylinder, they generally are parallel to the height of the cylinder. For circles, two centre lines are drawn perpendicular to each other passing through the centre of the circle.
What is the standard length and width of the arrowhead of dimension lines?
a) 2mm and 2mm
b) 3mm and 1mm
c) 4mm and 2mm
d) 3mm and 2mm
Answer: b
Explanation: Arrowheads of dimension lines have a length of 3mm and 1mm wide. When drawing the arrowheads the ratio, length: width is to be maintained at 3:1. The arrowheads can be drawn with length 6mm and breadth 2mm, since the ratio is the same.
Which type of line is used to join the dimension line and the curve that needs to be dimensioned?
a) Leader line
b) Outline
c) Dimension line
d) Section line
Answer: a
Explanation: Leader lines lead the dimension line to the curve that needs to be dimensioned. It is a bridge connecting two lines. Outlines are the main or most prominent lines of the object when viewed for drawing. Dimension lines are used to denote the particular dimensions.
In unidirectional system the dimensions are ______
a) Placed above the dimension lines
b) Placed below the dimension lines
c) Placed by breaking the dimension line in the middle
d) Placed left side of the dimension line
Answer: c
Explanation: In unidirectional system all dimensions are placed such that they can be read from the bottom of the drawing sheet. The dimension lines are broken near the middle for inserting the dimensions. This is used in mainly large drawings.
In aligned system the dimensions are __________
a) Placed parallel to the dimension line
b) Placed perpendicular to the dimension line
c) Placed left side of the dimension line
d) Placed right side of the dimension line
Answer: b
Explanation: In the aligned system the dimension is placed perpendicular to the dimension line. The dimensions should be placed near the middle and above, but clear of the dimension lines.
In dimensioning, the lines enclosing the dimension line are known as ____
a) Leader line
b) Dimension line
c) Extension line
d) Outline
Answer: c
Explanation: The extension line encloses the dimension line. It starts and ends with the line to be dimensioned. The extension line is extended beyond the dimension line by 4mm. It helps in defining proper boundaries for the dimension line.
The ratio of height to length of an arrow in dimensioning is ___
a) 1:2
b) 1:3
c) 1:4
d) 1:1.5
Answer: b
Explanation: The standard ratio of height to length of an arrow in dimensioning should be kept only 1:3. Even if there are so many types of arrows like oblique stroke, closed, open small open circle etc. Generally closed and filled arrowhead is widely used and with 1:3 ratio.
Dimension lines should be drawn at least ________mm away from the outlines and from each other.
a) 5
b) 6
c) 7
d) 8
Answer: d
Explanation: The standards are made as such that dimension lines should be drawn at least 8 mm away from the outlines and from each other. This gives clear, neat appearance in mentioning dimensions in drawing.
In which of the following type of dimensioning, the dimensions are arranged only in a straight line?
a) Parallel dimension
b) Chain Dimension
c) Combined dimension
d) Aligned dimension
Answer: b
Explanation: In chain dimension, the dimensions are arranged only in a straight line. In this type of dimensioning, the dimensions appear less crowded and make it easier to read. There is almost less confusion while interpreting the dimensions.
The advised position of placement of the dimensions should be ______
a) Inside the view
b) Outside the view
c) On the boundaries of the view
d) Cutting the view
Answer: b
Explanation: It is advised to place the dimensions outside the view. This will bring a clear picture of the view and will help in the understanding of the dimensions. Placing the dimensions outside the view gives a cleaner look.
If there is a need for the center line, then it can be used as a _____
a) Dimension line
b) Leader line
c) Extension line
d) Section line
Answer: c
Explanation: The center line can be used as an extension line. With the help of the center line as an extension line, we can dimension the distance between the centers of the circles from the outline view of the object. This helps in drawing the circle accurately.
As far as possible, the dimension should be given to which of the following lines?
a) Outline
b) Hidden line
c) Center line
d) Leader line
Answer: a
Explanation: Dimensions are given to the outlines of the view. It is advised not to dimension hidden lines as their true shape is not known when they hidden. It is important to dimension those lines whose true shape is properly visible.
Which of the lines is a thin continuous line with the ends terminating in arrowheads and is enclosed by extension lines, outlines or centre lines?
a) Dimension line
b) Leader line
c) Extension line
d) Section line
Answer: a
Explanation: The dimension line is a thin continuous line with the ends terminating in arrowheads and is enclosed by extension lines, outlines or centre lines. The dimension figures are written on the top of the dimension line or aligned at the centre of the dimension line according to the system of dimensioning.
What is the name of the thin continuous line which encloses the dimension lines are generally drawn 1mm away from the outlines?
a) Dimension line
b) Section line
c) Leader line
d) Extension line
Answer: d
Explanation: Extension line is a thin continuous line which encloses the dimension line and they are generally drawn 1mm away from the outlines. They need to draw near to the outlines and far away from the outlines.
What is the inclination of the leader in a drawing?
a) Vertical
b) Horizontal
c) Less than 30˚
d) Greater than 30˚
Answer: d
Explanation: The leaders are drawn at an inclination of more than 30˚. They should not be placed vertical, horizontal and less than 30˚ to the respective feature. The arrowhead should touch the feature they are describing or dimensioning.
In the unidirectional method of dimensioning, dimensions are placed in such a way that they can be read _______________ of the drawing sheet.
a) Right-hand side
b) Left-hand side
c) Bottom edge
d) Top edge
Answer: c
Explanation: Uni-directional system for dimensioning are placed in such a way it is read from the bottom side of the drawings. They are used in large drawings as aircraft, automobiles which are large complex drawing, where it is inconvenient to read the dimensions from the right-hand side.
Which type of lines are used for hatching in a drawing?
a) Chain thick
b) Dashed thick
c) Continuous thin
d) Chain thin double-dashed
Answer: c
Explanation: For the clear understanding of the inner parts of a body, we try to section the drawings, which are represented by hatching. Hatching is done using continuous thin lines.
Which of the following is not the pictorial projection?
a) Oblique projection
b) Isometric projection
c) Orthogonal projection
d) Perspective projection
Answer: c
Explanation: In four different types of projections: Oblique, Isometric, and Perspective projections, we can clearly get the three-dimensional view of the object. Whereas in the orthographic projection, three-dimensional object is represented in the two-dimensional view.
Which of the following does not use the parallel projection technique in pictorial projections?
a) Perspective projection
b) Axonometric projection
c) Isometric projection
d) Oblique projection
Answer: a
Explanation: In pictorial projections, we have parallel projection and perspective projection techniques. Axonometric and oblique projections belong to parallel projections. Axonometric projections are again classified as trimetric, dimetric and isometric. Hence perspective projections cannot be drawn by parallel projection technique.
In perspective projection, which of the following gives the position of the observer’s eye level?
a) Ground line
b) Vanishing point
c) Horizon line
d) Station point
Answer: c
Explanation: The horizon line in perspective projections indicates the eye level of the observer, and helps the viewer to judge the scale of the object and correct perspective to view. Vanishing point lies on the horizon line, where projection lines meet.
The receding axis of the oblique projection makes an angle with the horizontal axis within the range of ______
a) 30° – 90°
b) 0° – 90°
c) 30° – 45°
d) 30° – 60°
Answer: d
Explanation: In oblique projection, one of the axes is inclined at some angle with the horizontal axis, which is called a receding axis, while the other two are perpendicular to each other. This receding axis makes an angle from 30° – 60° with the horizontal axis.
In cavalier oblique projection, the receding axis makes an angle __________ with the horizontal axis.
a) 30°
b) 60°
c) 45°
d) 90°
Answer: c
Explanation: In cavalier projection, true length dimensions are represented along the receding axis, and this axis makes 45° with the horizontal axis. Mostly this type of drawings is used in oblique projections.
Axonometric projection can be sub classified into ______
a) Isometric, trigonometric, trimetric
b) Dimetric, trimetric, trigonometric
c) Isometric, diametric, trimetric
d) Trigonometric, diametric, isometric
Answer: c
Explanation: Isometric – where all the three sides of the object are equally inclined.
Dimetric – where two of the three sides are equally inclined.
Trimetric – where all the three sides of the object are inclined differently.
In _____ projection, one face of the object is kept parallel to the viewer.
a) Axonometric projection
b) Oblique projection
c) Perspective projection
d) Trimetric projection
Answer: b
Explanation: In oblique projection, one face of the objects is kept parallel to the viewer, or two of the axes are visually perpendicular to each other, while the third axis recedes at a convenient angle.
In engineering drawings, the three-view multi-view drawing is standard. What are the collections of three-view drawings?
a) The top, front, and the left-side views
b) The front, bottom and the right-side views
c) The bottom, rare and the top views
d) The top, front and the right side views
Answer: d
Explanation: For the complete descriptions of an object three-view of multi-view projections are required, they are the top, front and the right-side views.
When a portion of the drawing is enlarged for more accurate reading of the drawings, it is called ______
a) Half view
b) Partial view
c) Detailed view
d) Partial view
Answer: c
Explanation: In detailed drawings, a portion of drawings which are small, are enlarged to describe the details completely. Here standard projection view is followed.
Which of the following pencil grade is suitable for sketching?
a) 9H
b) 10H
c) 6H
d) H
Answer: d
Explanation: For sketching we need a soft-grade pencil, mostly HB and H sharpened pencils serves the purpose. As we need dim lines at first then it is made more intense to see the sketch details.
What should be the minimum distance between the hand and the pencil tip while drawing a horizontal line?
a) 5mm
b) 100mm
c) 40mm
d) 80mm
Answer: c
Explanation: Drawing straight lines in sketching is one of the difficult tasks and it requires proficiency. While drawing horizontal lines make sure you maintain a 40mm distance between the pencil tip and the hand.
The sections cut by a plane on a right circular cone are called as ______
a) Parabolic sections
b) Conic sections
c) Elliptical sections
d) Hyperbolic sections
Answer: b
Explanation: The sections cut by a plane on a right circular cone are called as conic sections or conics. The plane cuts the cone on different angles with respect to the axis of the cone to produce different conic sections.
Which of the following is a conic section?
a) Circle
b) Rectangle
c) Triangle
d) Square
Answer: a
Explanation: Circle is a conic section. When the plane cuts the right circular cone at right angles with the axis of the cone, the shape obtained is called as a circle. If the angle is oblique we get the other parts of the conic sections.
Which of the following conics has an eccentricity of unity?
a) Circle
b) Parabola
c) Hyperbola
d) Ellipse
Answer: b
Explanation: Eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix. It is denoted as e. The value of eccentricity can give information regarding which type of conics it is. The eccentricity of a parabola is the unity that is 1.
Which of the following has an eccentricity less than one?
a) Circle
b) Parabola
c) Hyperbola
d) Ellipse
Answer: d
Explanation: Eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix. It is denoted as e. The value of eccentricity can give information regarding which type of conics it is. The eccentricity of an ellipse is less than one.
A plane is parallel to a base of regular cone and cuts at the middle. The cross-section is __________
a) Circle
b) Parabola
c) Hyperbola
d) Ellipse
Answer: a
Explanation: A cone is formed by reducing the cross-section of a circle the point. So there exist circles along the cone parallel to the base. Since the given plane is parallel to the base of the regular cone. The cross-section will be circle.
The curve which has eccentricity zero is _______
a) Parabola
b) Ellipse
c) Hyperbola
d) Circle
Answer: d
Explanation: The eccentricity is the ratio of a distance from a point on the curve to focus and to distance from the point to directrix. For parabola it is 1 and for ellipse it is less than 1 and for hyperbola it is greater than 1. And for circle it is zero.
Representative fraction is the ____________________
a) ratio of the length in drawing to the actual length
b) ratio of the actual length to the length in drawing
c) reciprocal of actual length
d) square of the length in drawing
Answer: a
Explanation: Representative fraction is the ratio of the length of the object represented on drawing to the actual length of the object represented.
The length of the drawing is 50 mm, the scale is given as 1:5. Find the actual length.
a) 50 cm
b) 10 cm
c) 25 cm
d) 10 mm
Answer: c
Explanation: The scale given is 1:5 (reducing scale) that is the drawing is made with 1/5th of actual dimensions. So we have to multiply the drawing length with 5. 50 mm x 5 =250 mm and 1 cm =10 mm. The actual length in cm is 25.
What is the type of scale in which the representative fraction is 1:1?
a) Enlarged scale
b) Reduced scale
c) Full size scale
d) Graphical scale
Answer: c
Explanation: A full size scale is a type of scale in which the length of the drawing and the actual length of the object is of the ratio 1:1. Hence by definition, its representative fraction is 1:1. In full size scale, the drawing is drawn with the actual measurements.
The length of the drawing is 50 mm, the scale is given as 1:5. Find the actual length.
a) 50 cm
b) 10 cm
c) 25 cm
d) 10 mm
Answer: c
Explanation: The scale given is 1:5 (reducing scale) that is the drawing is made with 1/5th of actual dimensions. So we have to multiply the drawing length with 5. 50 mm x 5 =250 mm and 1 cm =10 mm. The actual length in cm is 25.
What is the type of scale in which the representative fraction is 1:1?
a) Enlarged scale
b) Reduced scale
c) Full size scale
d) Graphical scale
Answer: c
Explanation: A full size scale is a type of scale in which the length of the drawing and the actual length of the object is of the ratio 1:1. Hence by definition, its representative fraction is 1:1. In full size scale, the drawing is drawn with the actual measurements.
A scale which is numerically represented on the drawing sheet is called as _____
a) Graphical scale
b) Engineer’s scale
c) Reducing scale
d) Full size scale
Answer: b
Explanation: An engineer’s scale is the representation of the scale used in drawing on the drawing sheet numerically. For example, if the length of the drawing is 5 cm and the actual length is 10m, then it is numerically represented as 5cm = 10m.
Which of the following scale is used in survey maps?
a) Engineer’s scale
b) Diagonal scale
c) Graphical scale
d) Vernier scale
Answer: c
Explanation: Graphical scales are used in survey maps. The graphical scale is drawn on the drawing. When the drawing ages, the engineer’s scale shrinks and may not give accurate results. Hence graphical scale is used as the drawing shrinks, the scale will also shrink.
What is the formula for calculating the length of the scale?
a) Minimum length to be measured x R.F.
b) Minimum length to be measured ÷ R.F.
c) Maximum length to be measured ÷ R.F.
d) Maximum length to be measured x R.F.
Answer: d
Explanation: The length of the scale is calculated by using the following formula,
Length of the scale = R.F. x Maximum length to be measured.
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