what are the groups of instruments?
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Define tons of refrigeration and cop.
what is synchronizer
What is the difference between hard water and soft water ?
what are the evidence required for checking when pay money in backdoor job process
How with alloying of steel it is possible to a achieve properties which can not be achieved with heat treatment ?
how can we remove paint from (painted over)plastic or nylon objects with out damaging the object?
If any machinery or transmission needs periodic ana regular lubrication . what is the best method to give it?
Explain how pipe flanges are electrically insulated?
Heavy fuel oil sulfur content and counter measures?
what is the function of platern water wall in a boiler? and difference between with ordinary water wall?
• Describe your management style
sir, please send previous years RRB junior engineer (mechanical) exam papers