Machine Drawing Questions and Answers Part-13

1. Incomplete thread is hatches in assembly of external and internal thread.
a) True
b) False

Answer: b
Explanation: Incomplete threads are not hatches in assembly of external and internal thread; the area common to both is shown hatched at an angle of external thread. Because the not hatching sows the threads are incomplete in nature according to that view incomplete threads are not hatches in assembly of an external and internal thread.

2. Whatever material is cut by the cutting plane, should be _______
a) not hatched
b) hatched
c) empty
d) vertical

Answer: b
Explanation: Whatever material is cut by the cutting plane should be hatched. If material is other than iron, standard conventions for some commonly used materials are being used. Like aluminum material showing by the inclined lines and this is placed at too far distance.

3. The hatching line should be inclined at an angle ________
a) 35°
b) 25°
c) 45°
d) 55°

Answer: c
Explanation: The hatching lines are parallel to each other and it is normally inclined at an angle 45° or 135°.If the object is inclined to the horizontal. The hatching angle is to be measured from the objects horizontal axis and inclined at an angle 45° or 135°.

4. When two different parts are adjacent to each other, then the section line is drawn at an angle _____ and _______
a) 35° and 125°
b) 45° and 135°
c) 45° and 125°
d) 35° and 135°

Answer: b
Explanation: When two different parts are adjacent to each other, then the section line is drawn at an angle 45° and 135°. If one part is hatched at an angle 45° then the second object section line drawn at an angle 135° from horizontal. Due to this section line shows the two different objects. It is easy for understanding that it has two separate objects.

5. For three parts are placed in which of the case is fitted for that ___________
a) Change angle of hatching for third part as 45° or 75°
b) The gap between the section lines for object is same for the entire object
c) There will be no offset for the section line
d) The gap between the section lines for object is not same for the entire object

Answer: c
Explanation: When the three objects is placed adjacent to each other following point is to be noted
1 – Change angle of hatching for third part as 30° or 60°.
2 – Offset the lines keeping the angle as 45° or 135°.
3 – Change the gap between the lines relative to the two objects.
The angle of section lines at 45° is to be kept with reference to the axis of the object.

6. The distance between two section lines is called ________
a) length of the section line
b) width of the section line
c) thickness of the section line
d) pitch of the section line

Answer: d
Explanation: The distance between two section lines is pitch of the section line. There is no fixed point or distance at which the section line is draw. It is generally in between the 1 to 3 mm is depending upon the size of the object. Pitch of section lines is one of the most important topics in section lines.

7. The method which suggests the draw the section lines at equal distances is called _________
a) distance of section lines
b) drawing section lines
c) pitch of section lines
d) angle of section lines

Answer: b
Explanation: For better appearance, the section lines are drawn at a proper distance. The method which suggests the draw the section lines at equal distances is called drawing section lines. The section line is drawn with the help of set square and T- square and draws a section line at 45° or 135°.

8. To project the auxiliary the auxiliary view, an imaginary plane, known as _________
a) reference plane
b) principle plane
c) normal plane
d) inclined plane

Answer: a
Explanation: To project the auxiliary the auxiliary view, an imaginary plane, known as reference plane is placed at the angle which is given the view. Even two views for drawing on which the total details are shown is sufficient. It is easy for drawing.

9. Reference plane is parallel to the direction of view.
a) True
b) False

Answer: b
Explanation: Reference plane is perpendicular to the direction of view. The auxiliary view is drawn to the direction view. The auxiliary view is mostly drawn on the dimension of the side view and top view. This is the basic point for drawing auxiliary view.

10. Dimension of one side of the inclined surface can be ______ projected on the reference plane.
a) indirectly
b) equally
c) directly
d) normally

Answer: c
Explanation: Dimension of one side of the inclined surface can be directly projected on the reference plane. For dimension of the other side, it has to be drawn or transferred from the view. In this method, the auxiliary view may have to be drawn from the suitable distance of the main view; hence the dimension is easily transferred with ruler or divider which is important.