39) The base unit of length as per SI is the
Related ISRO Technician-B Turner Question Paper - 2015 (Set - 1) with Answer Key
The try-square is a precision instrument which is used to check the squareness of a surface and the flatness of surfaces.
Un desirable event
An accident is
* Unplanned event
* Non-controlled event
* Undesirable event
Fuel, heat and oxygen
Fire is a combination of Fuel, heat and oxygen.