38) "V" blocks of grade 'B' are made of
Answer is:
Closed grain cast iron
!["V" blocks of grade 'B' are made of](https://mcqfinder.in/uploads/images/question-papers/isro-technician-b-turner-2015-set-1/isro-technician-b-turner-2015-set-1-id-38-e.jpg)
Related ISRO Technician-B Turner Question Paper - 2015 (Set - 1) with Answer Key
Answer is:
Try square
Explanation:
The try-square is a precision instrument which is used to check the squareness of a surface and the flatness of surfaces.
![Which one of the following instruments is used to check squareness and flatness of the job?](https://mcqfinder.in/uploads/images/question-papers/isro-technician-b-turner-2015-set-1/isro-technician-b-turner-2015-set-1-id-40-e.jpg)
Answer is:
Un desirable event
Explanation:
An accident is
* Unplanned event
* Non-controlled event
* Undesirable event
![An accident is](https://mcqfinder.in/uploads/images/question-papers/isro-technician-b-turner-2015-set-1/isro-technician-b-turner-2015-set-1-id-41-e.jpg)
Answer is:
Fuel, heat and oxygen
Explanation:
Fire is a combination of Fuel, heat and oxygen.
![Fire is a combination of](https://mcqfinder.in/uploads/images/question-papers/isro-technician-b-turner-2015-set-1/isro-technician-b-turner-2015-set-1-id-42-e.jpg)