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The ability to do work is called energy.

Inclination of tyre from vertical is called camber.

In a square engine the stroke length and cylinder diameter are same.

For drawing parallel lines to a given line through a given point we make use of arcs. By cutting the given line using an arc with centre as the given point and of convenient radius, then using the same radius cutting an arc with centre with the new intersection point and so on we make the parallel line

The line bisecting the major axis at right angles and terminated by curve is called the minor axis. The line which passes through the focus and perpendicular to the major axis is latus rectum. Tangent is the line which touches the curve at only one point.

First angle projection is recommended by Bureau of Indian Standards but USA and other countries recommend third angle projection. The changes in both the projections are relative positions in projection

For Whitworth thread the angle between the two flanks is 55 degrees.
For British association thread the angle between the two flanks is 47.5 degrees.
The depth of thread is 0.6 times the pitch with rounded tops and bottoms.

For a buttress thread the distance between the crest and root (d) is 0.75 times the pitch, for square thread ?d? is 0.5 times the pitch, for a Whitworth external thread ?d? is 0.64 times the pitch.

RF is a ratio of size taken on drawing sheet to the actual size of the object.
R.F < 1 for big objects like airplane, ship, tree, lathe etc.
R.F = 1 for objects in common use. May be a book, shoe, pencil, pen, cell phone, remote etc.
R.F >1 for small size objects like a wrist watch, pencil cell, thread needle, button etc.

Inclined letters are Single-stroke letters which lean to the right making a slope of 75 degree with the horizontal as per the guidance of Indian Standards. Also known as Italic lettering. Not recommended for beginners until you have mastered in vertical lettering. Inclined and vertical lettering should never appear on the same drawing

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