Instruction
- Total number of questions : 20
- Time allotted : 30:00 Minutes:Seconds.
- Each question carry 1 mark, no negative marks.
- DO NOT refresh the page.
- All the best
Engineering Graphics [ Question No: 1 To 20 ] :
To show the cross-section of a crane hook in machine drawing, the type of section used is :
A CAD drawing hatches incorrectly and reports an area of zero for a closed-looking outline. The likely cause is
What is a block in a CAD drawing?
Which entry method suits tracing an outline whose successive side lengths are known?
Why can angles not be set out in isometric with a protractor?
A cone of 60 mm base diameter and 80 mm slant height develops as a sector whose angle is about
In the lune method the sphere is divided into
A section is measured directly from the elevation of an obliquely cut prism and reported as the true shape. The figure will be
For that same cut, the minor axis of the ellipse measures
Cutting a vertical square prism by a plane inclined to its base gives a section whose shape is
A solid resting on an edge of its base has that edge
For that same component, dimensioning from a datum instead holds the last feature's position to
Dimensions should be placed
Shafts, bolts, nuts, keys, rivets and webs are conventionally
Hatching of a sectioned surface is drawn as
A cutting plane on a drawing is indicated by a
A hidden edge is shown on an orthographic drawing as a
The front view of an object should be chosen as the one that
The pitch of a helix is the distance advanced along the axis in
The latus rectum of a conic is the chord through the focus drawn
Total number of questions : 20
Number of answered questions : 0
Number of unanswered questions : 20
Engineering Graphics [ Question No: 1 To 20 ] :
To show the cross-section of a crane hook in machine drawing, the type of section used is :
Your Answer : (Not Answered)
Correct Answer : A
The section used is a revolved section.
A revolved section shows the shape of a part's cross-section by cutting it at a point, turning the section through 90° and drawing it on the view itself. It suits long members whose section changes along their length, such as crane hooks, spokes, arms and ribs.
A full section and a half section show the interior of a whole object rather than the section of a slender member. A removed section is the same idea drawn away from the view, usually where there is no room on the view itself, so the standard choice for a crane hook is the revolved section.
A CAD drawing hatches incorrectly and reports an area of zero for a closed-looking outline. The likely cause is
Your Answer : (Not Answered)
Correct Answer : B
Correct answer: a gap between two entities at a corner
Hatching and area measurement both need a genuinely closed boundary, and an outline that merely looks closed at screen resolution may have a gap of a fraction of a unit at a corner. Zooming in on each corner, or using the drawing’s own boundary check, finds it - and snapping to endpoints in the first place prevents it.
What is a block in a CAD drawing?
Your Answer : (Not Answered)
Correct Answer : B
Defining a bolt, a symbol or a standard detail once and inserting it repeatedly saves work and keeps every instance identical. Redefining the block updates every insertion at once, which is its greatest practical benefit.
Which entry method suits tracing an outline whose successive side lengths are known?
Your Answer : (Not Answered)
Correct Answer : B
A chain of known displacements maps directly onto relative entry, since each side is given as an offset from the previous corner. The drawback is that an error early in the chain carries through to every point after it, which absolute entry avoids.
Why can angles not be set out in isometric with a protractor?
Your Answer : (Not Answered)
Correct Answer : B
Only lengths along isometric lines survive the projection in a predictable ratio; an angle between two such lines opens or closes according to the plane it lies in. A 90 degree corner of the object appears as either 60 or 120 degrees on the drawing.
A cone of 60 mm base diameter and 80 mm slant height develops as a sector whose angle is about
Your Answer : (Not Answered)
Correct Answer : B
Correct answer: 135 degrees
The sector angle is the base circumference divided by the circumference of a full circle of the slant height: \[ \theta = \frac{r}{L} \times 360 = \frac{30}{80} \times 360 = 135^\circ. \] Note the base radius is used, not the diameter - the 60 mm given is the diameter.
In the lune method the sphere is divided into
Your Answer : (Not Answered)
Correct Answer : C
Correct answer: vertical segments between meridian planes
The lune method cuts the sphere into orange-peel segments between meridians and flattens each. It is the alternative approximation to the zone method, and the choice between them is usually settled by how the material is to be cut and joined rather than by accuracy.
A section is measured directly from the elevation of an obliquely cut prism and reported as the true shape. The figure will be
Your Answer : (Not Answered)
Correct Answer : D
Correct answer: too small in the direction of the inclination
An inclined face is foreshortened in a principal view: the elevation shows its projected length rather than its real one, and the projection is always the shorter. Measuring from the elevation therefore understates the section in the direction of the inclination, which is precisely why an auxiliary view is projected.
For that same cut, the minor axis of the ellipse measures
Your Answer : (Not Answered)
Correct Answer : D
Correct answer: 60 mm
The minor axis is the diameter itself, 60 mm, whatever the inclination. It lies perpendicular to the direction in which the cut is stretched, so the obliquity does not affect it. Only the major axis lengthens, which is why the ellipse becomes more eccentric as the cut is made shallower.
Cutting a vertical square prism by a plane inclined to its base gives a section whose shape is
Your Answer : (Not Answered)
Correct Answer : C
Correct answer: a rectangle longer than the base in one direction
The cut still crosses the same two pairs of faces, so the figure remains a rectangle; but the distance between the two faces it crosses obliquely is stretched by the inclination, while the other pair is unaffected. One dimension of the base is therefore preserved and the other lengthened.
A solid resting on an edge of its base has that edge
Your Answer : (Not Answered)
Correct Answer : D
Correct answer: parallel to one principal plane and in the other
Resting on a base edge means that edge lies in the horizontal plane, and it is drawn parallel to the vertical plane so that it appears in true length in the elevation and the tilt can be measured. The base is then inclined to the horizontal plane, touching it along that line rather than over its whole area.
For that same component, dimensioning from a datum instead holds the last feature's position to
Your Answer : (Not Answered)
Correct Answer : A
Correct answer: plus or minus 0.2 mm
Measuring from a datum makes each feature’s position depend on one dimension only, so the last hole is held to the tolerance of its own dimension - plus or minus 0.2 mm - regardless of how many features lie between it and the datum. Compare the chain arrangement, where the same tolerances accumulate to plus or minus 0.8 mm.
Dimensions should be placed
Your Answer : (Not Answered)
Correct Answer : B
Correct answer: outside the outline of the view wherever possible
Dimensions placed outside the outline keep the view itself clear and avoid extension lines crossing the drawing. They are arranged so that the shorter dimensions lie nearest the view and the longer ones outside them, so that extension lines do not cross dimension lines. Dimensioning inside the outline is done only where clarity actually demands it.
Shafts, bolts, nuts, keys, rivets and webs are conventionally
Your Answer : (Not Answered)
Correct Answer : A
Correct answer: shown unsectioned even when the plane passes through them
Sectioning a solid shaft, bolt, nut, key, rivet or web would show a solid area of hatching that conveys nothing, and in the case of a web would falsely suggest a solid flange. The convention is to draw such parts unsectioned even when the cutting plane passes along them, so the drawing shows the shape rather than the cut.
Hatching of a sectioned surface is drawn as
Your Answer : (Not Answered)
Correct Answer : D
Correct answer: thin lines at 45 degrees, evenly spaced
Hatching is drawn thin so it does not compete with the outline, at 45 degrees to the principal outline, and evenly spaced with the spacing chosen to suit the size of the area. Where 45 degrees would run parallel to an outline, another angle is used. Adjacent parts in an assembly are hatched in opposite directions or at different spacings so the joint is visible.
A cutting plane on a drawing is indicated by a
Your Answer : (Not Answered)
Correct Answer : B
Correct answer: long chain line thickened at its ends and changes of direction
The cutting plane is a long chain line, thin along its length but thickened at each end and at every change of direction, with arrows at the ends showing the direction of viewing and capital letters identifying the section. The thickening marks exactly where the plane begins, ends and steps, which is what an offset section needs.
A hidden edge is shown on an orthographic drawing as a
Your Answer : (Not Answered)
Correct Answer : C
Correct answer: short-dashed thin line
A hidden edge is one that exists but cannot be seen from that direction, and it is drawn as a thin line of short dashes. Keeping it thin and dashed distinguishes it at a glance from a visible outline, which is continuous and thick, and from a centre line, which is a long chain. Line type is the drawing’s vocabulary and each type means one thing.
The front view of an object should be chosen as the one that
Your Answer : (Not Answered)
Correct Answer : C
Correct answer: shows the most characteristic shape with fewest hidden lines
The front view sets the arrangement of everything else, so it should be the one that conveys most at a glance: the outline that identifies the object, in the position it occupies in use or manufacture, with as few hidden edges as possible. Area on the sheet and proportion are irrelevant, and choosing the view with most hidden lines is the opposite of the rule.
The pitch of a helix is the distance advanced along the axis in
Your Answer : (Not Answered)
Correct Answer : C
Correct answer: one complete revolution
The pitch is the axial advance for one full turn, so the helix rises by its pitch each time it goes round. Together with the diameter it fixes the helix completely: the helix angle is the arctangent of the pitch divided by the circumference, and every property of a screw thread follows from those two dimensions.
The latus rectum of a conic is the chord through the focus drawn
Your Answer : (Not Answered)
Correct Answer : B
Correct answer: perpendicular to the axis
The latus rectum is the focal chord at right angles to the axis, and its length is a natural measure of how open the curve is. For a parabola it is four times the distance from vertex to focus, which is the quickest way of setting out the width of the curve once the focus is fixed.
Marks
Total number of questions : 20
Number of answered questions : 0
Number of unanswered questions : 20