You would be given minimum 2 drawing questions. one would be a 3d composition or a theme sketch that you are required to color. the second one would be a 2 d composition or a mirroring/ scaling/ rotation of a pattern.

Examples -

3D composition -

1. Create an interesting composition using bread slices, cucumber pieces and a jam bottle. create shade and shadows.
2. Draw earthen pots of different shapes and sizeses. create shades and shadows.
3. draw an interesting composition using 6 tyres. create shades and shadows.
4. there is a glass on a table and inside the glass there are 2 tooth brushes and one tooth paste, and there is a shaving brush lieng besidet the glass on the table. do all the shades and shadows.
5. Using a object with a square, an rectangular object and pyramid, create a composition

Theme Sketch -

1. imagine you are in a museum and there are no people in it. draw what you see.
2. you are a bird flying over the ruins, draw what you see.
3. you are 6 cms in ht and are on an explorer table. there are 2 large books a globe and a map. draw what you see.
4. you are 6 cm in height and are on a newspaper at a door. draw what you see.
5. you are inside a ticket counter ( a ticket issuer). there is a long queue outside the ticket counter. draw what you see.

2D composition -

1. Create an interesting composition using trigonometric shapes. colour using any 3 colours.
2. Design a tshirt graphic on " save girl child"
3. Create a logo for a snack bar using only basic geometric shapes. colour using any 5 colours.
4. Create a graphic on save earth using only geometrical shapes. colour using any 4 colours
5. Slice a rectangle with 3 straight lines and 1 curved line, all freehand lines. colour using any 4 colours.

for the next question - In the 2014 drawing paper for JEE(available on the JEE official website), there's a question asking us to draw a 140mm×210mm rectangle and make the composition in it. How are we supposed to do this without a scale?

Answer - 140 mm : 210mm is a 1:1.5 ratio. In JEE scale is not allowed. hence you need to make an approximation. You can take reference of size of a known object. like for example a full length standard pencil is size is about 19 cm or 190 mm. so you can make an approximation of of how much would be 140 mm. once you determine 140 mm, you need to increase it by 1.5 times to get 210 mm.

hope this is helpfull.