Engineering Drawing Quiz

The pencil lead graded as 'B' is the softest among the options. The letter 'B' indicates a softer lead, while 'H' indicates a harder lead.

A French curve is a drafting tool used to draw smooth, curved lines that are not a perfect circle or arc. It can be used to create a variety of curves, including those that are elliptical, parabolic, or hyperbolic.

A full scale representation means the drawing is the same size as the real object. This is represented by the ratio 1:1, where both the drawing and the object have the same dimensions.

A title block is a standardized area on a drawing sheet that contains important information about the drawing, such as the title, date, revision number, and the name of the designer. The standard size for a title block in India is 175mm x 90mm.

Lettering on a drawing sheet should be done in capital letters to improve readability and consistency. This ensures that all the text is uniform and easy to read.

The total distance covered by a circle when it makes one complete rotation is the circumference, which is calculated using the formula 2πr, where r is the radius of the circle. Therefore, the distance covered by a rolling circle in one revolution is 2πD, where D is the diameter of the circle.

An involute is a curve that is traced by the end of a taut string as it is unwound from a fixed curve. The most commonly used involute is the involute of a circle, where the string is unwrapped from a circular object.

The parabola is a curve where every point is the same distance from a fixed point (the focus) and a fixed line (the directrix). One common method for drawing a parabola is the tangent method.

A circle has zero eccentricity. Eccentricity helps describe how a circle's shape deviates from a perfect circle. A circle's eccentricity being zero means it has no deviation and is perfectly round.

A circle has 360 degrees. This represents a full rotation around the center point.

When a ball is thrown, its trajectory often resembles a parabolic curve. This curve represents the path the ball takes through the air, influenced by gravity.

A protractor is a tool used to measure and draw angles. It is a semi-circular instrument with markings for angle measurements.

The diagonals of a rhombus bisect each other at right angles. This means they cut each other in half and form four 90-degree angles.

A parabola is a type of conic section created by the intersection of a cone and a plane parallel to its side.

The profile of a gear tooth is designed in the form of an involute curve. This shape ensures smooth and efficient meshing between gears.

The eccentricity of an ellipse is always less than 1. This value determines the ellipse's shape, with a lower eccentricity resulting in a more circular shape.

A cycloid is a curve generated by a point on a circle as the circle rolls along a straight line without slipping. It is a classic example of a parametric curve.

The path traced by the earth while moving around the sun is an ellipse. This elliptical orbit results in variations in the earth's distance from the sun throughout the year.

The diagonals of a rhombus bisect each other at right angles. This means they cut each other in half and form four 90-degree angles.

A parabola is a type of conic section created by the intersection of a cone and a plane parallel to its side.

The profile of a gear tooth is designed in the form of an involute curve. This shape ensures smooth and efficient meshing between gears.

The shape of the reflector of a car's headlight is a parabola, which helps to focus the light into a beam.

A coordinate plane has four quadrants, numbered 1 through 4, starting in the upper right and going counterclockwise.

A point above the Horizontal Plane (HP) and behind the Vertical Plane (VP) is located in the second quadrant.

In engineering drawings, HP stands for Horizontal Plane and VP stands for Vertical Plane. These planes are used to represent objects in 3D space on a 2D drawing.

If a point lies on both the HP and VP, then the point will be located on the XY line, which is the intersection of the HP and VP.

When projecting a plane, we typically neglect the thickness of the plane, focusing on its length and width, as it's considered a 2D representation.

The angle a true line makes with the VP is denoted by the Greek letter beta (β).

The angle between a line and the Horizontal Plane (HP) is denoted by the Greek letter 'theta' (ϴ).

The top view of a pentagonal plate inclined to HP and parallel to VP will appear as a pentagon.

The top view of a rectangular plate parallel to HP and inclined to VP will appear as a rectangle.

The true length of a line is always greater than or equal to its plan length.

If a point is in the second quadrant, its top view will be on the XY line.

A point whose elevation and plan are both below the XY line is situated in the third quadrant.

The projection of a point will always be in one line, connecting its elevation and plan views.

A method of representing 3D objects on a 2D plane using parallel projection lines. The viewer is assumed to be at infinity, ensuring all lines are parallel and orthogonal to the projection plane.

A method of orthographic projection where the top view is placed above the front view, and the right side view is placed on the right side of the front view.

A method of orthographic projection where the top view is placed below the front view, and the right side view is placed on the left side of the front view.

A type of pictorial drawing where all three axes are inclined at 120 degrees to each other, resulting in a slightly distorted view of the object.

The lines in an isometric projection become shorter than their actual lengths to maintain proportionality. The ratio of the actual length to the projected length is √3: √2.

It is the language used by engineers for communicating designs, specifications, and instructions. It involves technical drawings, symbols, and notations.

The standard unit of linear measurement used in engineering drawings and designs within the mechanical industries. It aids precision and standardized communication.

The drawing technique used to create a 3D representation of an object on a 2D plane by creating a distorted view of the object using parallel projection lines.

A specific type of pictorial drawing that shows an object from a single viewpoint, with all lines parallel to the drawing plane. It provides an accurate representation of the object's shape and dimensions.

A curve used to represent the path of a point as a line segment rotates around a fixed point. The curve is not smooth and has specific shapes depending on the angle of rotation.