1st April 2020, Period 6, Class XII, Engineering Graphics, Topic: Isometric Projection - 7
Dear Students,
Good Morning and a warm welcome to today's class.
It feels really nice to meet up for yet another class this morning. From your interactions and responses on the previous blogs / EG WhatsApp Group, I am pleased to say that you all are doing good work. However, I expect an even better response in all the future classes.
Recall that in the last 6 sessions, you have leant the basics of Isometric Projection that included:
1. Essentials of Isometric Projection,
2. Planar figures,
3. Frustums,
4. Single Solids and
5. Combination of Solids.
'Combination of Solids' is the last topic in Unit 1 and we will spend a few more classes in grasping this topic in a manner that is nothing less than perfection.
We expect a total of 25 to 28 marks being alloted to this unit in the Final CBSE Examination 2021.
I encourage you to ask your doubts and queries by writing in the comments section at the end of the blog and I promise to make sincere efforts at resolving them while you are still working on the exercise.
CW and HW
Exercise - 7 comprising 3 questions, appears below, which you need to solve in your Drawing Files (or loose A4, photocopy sheets) and send them as IMAGES on the EG WhatsApp Group specially created for this purpose.
Please retain this work (Exercise-wise solutions) which will be checked and verified physically once you are asked to submit when school reopens.
However, those who are not able to finish working on the answers, you may send your response anytime during the day...
Today we will solve some questions on Isometric Projection of Combination of solids.
Exercise - 7
Instruction: Mention titles, all dimensions and indicate the direction of viewing.
Q 1. Draw Isometric Projection of a square prism of base side 30 mm and height 60 mm (all base sides equally inclined to the VP) placed centrally on top of a hexagonal slab of side 40 mm and height 30 mm.
Q 2. Draw Isometric Projection of a hemisphere of diameter 50 mm placed centrally on top of a Square prism of side 40 mm and height 50 mm.
Q 3. Draw Isometric Projection of a triangular prism of base side 30 mm and height 60 mm (one base side is perpendicular to the VP) placed centrally on top of a pentagonal slab of side 40 mm and height 30 mm.
Sir, could you please elaborate on the method to draw a hemisphere, that is, to convert the ellipse to hemisphere.
ReplyDeleteHritish
This comment has been removed by the author.
DeleteGood morning sir
ReplyDeleteGood morning sir.
ReplyDeleteGood morning sir
ReplyDeleteGood morning Sir
ReplyDeleteGood morning sir
ReplyDeleteGood Morning students. The class begins at 11.35 am.
ReplyDeletegood morning sir
ReplyDeleteGoooood moorrning sir
ReplyDeleteGood morning sir
ReplyDeleteSyed Hamza Ali
12-D
As expalined earlier, in making a hemisphere, we first draw the ellipse as we always did. And draw a semi circle.
ReplyDeleteGood morning sir
ReplyDelete- Alan Bobby
- 12 D
Good morning sir
ReplyDeleteThis comment has been removed by the author.
ReplyDeleteGood morning sir
ReplyDeleteSirji how to do the first question
ReplyDeleteGo over the theory and text in another 10 mins and start with the exercise questions.
ReplyDeleteSir i didn't get it, how do i draw the edges of the square prism equally inclined to the VP
DeleteThis comment has been removed by the author.
ReplyDeletegood morning sir
ReplyDeletegood morning sir
ReplyDeleteGood morning sir
ReplyDeleteBenil xii c
For Q 1, please refer to the helping figure i sent on the EG Whatsapp group.
ReplyDeleteWhat you could have done is to locate the mid points of the rhombus and connect to get a square base.
ReplyDeleteNow finish your work during the day and sent your answers on the EG WhatsApp group. I will individually check your work..