Quiz: Mechanical Engineering

Exam: DFCCIL

Topic: Engineering Drawing

Each question carries 2 mark

Negative marking: 1/3 mark

Time: 15 Minutes

Q1. If all the horizontal or vertical dimensions of the object start from a common extension line situated at one end, the way of dimensioning is called

(a) Chain dimensioning

(b) Parallel Dimensioning

(c) Combined Dimensioning

(d) None of the above

Q2. The included angle of a pentagon is

(a) 68°

(b) 72°

(c) 108°

(d) 112°

Q3. The curve traced out by an end of a string unwound from a circle or polygon, keeping it always tight, is a

(a) Cycloid

(b) Ellipse

(c) Helix

(d) None of the above

Q4. The line joining any point on an Archimedean spiral with the pole is called the

(a) Shortest radius

(b) Radius vector

(c) Vectorial angle

(d) Convolution

Q5. Which one of the following is not a principal plane of projection?

(a) Horizontal plane

(b) Vertical plane

(c) Profile plane

(d) Auxiliary plane

Q6. The Top View of a rectangular shaped room will show

(a) Length and Height

(b) Length and Width

(c) Width and Height

(d) none of the above

Q7. To obtain the point view of a line, the auxiliary plane is set to

(a) perpendicular to true length

(b) parallel to true length

(c) inclined at angle to true length

(d) none of the above

Q8. The scale used for angular measurement is

(a) plain scale

(b) vernier scale

(c) diagonal scale

(d) none of the above

Q9. In the first angle projection method, the direction of arrows on the cutting plane line is

(a) away from POP (plane of projection)

(b) towards the POP

(c) away from the base of solid

(d) towards the base of solid

Q10. Which of the following relationships is true for the first-angle method of projection?

(a) Object-POP-Observer

(b) Object-Observer-POP

(c) POP-Observer-Object

(d) Observer-Object-POP

` Solutions`

S1. Ans.(b)

Sol. In parallel or progressive dimensioning, placement of a number of single dimension lines parallel to one another starting from a common extension line situated at one end is done.

S2. Ans.(c)

Sol. For a regular polygon, included angle is given as (n-2)/n×180°

As in pentagon n=5

Therefore, included angle is (5-2)/5×180°

Which is 108°.

S3. Ans.(b)

Sol. The sum of the distance of a point on the ellipse from the two foci is equal to major axis.

S4. Ans.(b)

Sol. Radius vector is the line joining any point on the curve with the pole.

S5. Ans.(d)

Sol. Auxiliary plane is not the principal plane of projection.\

S6. Ans.(b)

Sol. The Top View of a rectangle shaped room will show both length and width.

S7. Ans.(a)

Sol. To obtain the point view of a line, the auxiliary plane is set perpendicular to true length.

S8. Ans.(d)

Sol. Scale of chords is used for angular measurements.

S9. Ans.(b)

Sol. In the first angle projection, the direction of arrows on the cutting plane line is towards the POP.

S10. Ans.(d)

Sol. For the first angle projection, the setup is

Observer-Object-POP.