First angle projection

By Rebecca
4 Min Read

1. In the First angle projection the object is kept in _________

a) 1st quadrant
b) 2nd quadrant
c) 3rd quadrant
d) 4th quadrant

Answer:

a) 1st quadrant

Explanation:

Even while we can place an object in any quadrant of the projection planes, every time we do so, the object’s relative location in the projections changes. The 1st angle symbolizes the first stage in the formation of plane projections, and the 1st quadrant represents the 1st angle projection in this case.

2. First angle projection is recommended by _____________

a) USA
b) ISI
c) Bureau of Indian Standards
d) ASME

Answer:

c) Bureau of Indian Standards

Explanation:

The Bureau of Indian Standards recommends the first angle projection, although the United States and other countries favor the third angle projection. The modifications in both projections are a function of their respective places in the projection.

3. In First angle projection the _________ lies between ___________ and ____________

a) object, projection plane, observer
b) projection plane, object, observer
c) reference line, side view, front view
d) reference line, left side view, right side view

Answer:

a) object, projection plane, observer

Explanation:

The observer is always at the top of the right side of the graph. As a result, as the observer watches, the item appears first, followed by the projection plane, which appears as the object in the first quadrant of the first angle projection. As a result, the item is located between the projection plane and the observer.

4. In the First angle projection the positions of the front and top views are __________

a) top view lies above the front view
b) front view lies above the top view
c) front view lie left side to top view
d) top view lie left side to front view

Answer:

b) front view lies above the top view

Explanation:

Due to the fact that the object is in the first quadrant and that the front view projects on the vertical plane while the top view projects on the horizontal plane, the object is considered to be in the first quadrant. The horizontal plane must also be rotated 90 degrees clockwise to indicate the projection, as shown in the diagram.

5. In the first angle projection, the left side view will be the left side of the front view.

a) True
b) False

Answer:

b) False

Explanation:

If we observe the object from its left side, the left side will be projected only if we look at it from the left side of the object, and the impression will fall to the right side of the front view, just as it did on the other side, resulting in the left side view being placed on right side of the front view.

6. In the first angle projection, the front view will be below the top view.

a) True
b) False

Answer:

b) False

Explanation:

Because the object is in the first quadrant and the front view projects on the vertical plane, while the top view projects on the horizontal plane, the object is considered to be in the first quadrant. Furthermore, in order to show the projection, the horizontal plane must be rotated 90 degrees in the clockwise direction. The top view will be placed underneath the front view in this case.

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Posted by Rebecca
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Rebecca is an Independent content writer for breldigital, She writes content on any given topic. She loves to write a case study article or reviews on a brand, Be it any topic, she nails it