Engineering Drawing Practice Test 4

1. In the design of gears tooth profile, we use cycloidal curves.

2. In the formation of the cycloidal curves, the circle which rolls with a fixed point without slipping is called _____________

3. For the cycloidal curves, the normal passes through which of the following?

4. Steps are given to determine the centre of curvature at a given point on an Ellipse. Arrange the steps. Let P be the given point on the conic and F and F1 are the foci.
i. Produce F1G to H so that GH = VF. Join H with F.
ii. Then O is the required centre of curvature.
iii. Draw a line GO parallel to HF and intersecting the axis at O.
iv. Draw a line F1G inclines to the axis and equal to VF1.

5. Mathematical equation for Involute is ___________

6. A curve traced out by a point in a straight line, which rolls without slipping along polygon or a circle is called __________

7. Conic sections are the locus of points whose distance from a focus is a constant multiple of the distance from the ________

8. Conic is a locus of points whose distance from a fixed point is a constant multiple of the distance from the fixed line. The fixed point is called_____

9. Which of the following has an eccentricity less than one?

10. Steps are given to determine the centre of curvature at a given point on a conic. Arrange the steps. Let P be the given point on the conic and F is the focus.
Join P with F.
Draw a line NR perpendicular to PN and cutting PF or PF-extended at R.
Draw a line RO perpendicular to PR and cutting PN-extended at O which is centre of curvature.
At P, draw a normal PN, cutting the axis at N.