The following pie-chart shows the percentage distribution of the expenditure incurred in publishing a book. Study the pi…

Who discovered electric generator? 

Shrinkage in concrete can be reduced by using 

parallel rulling straight edge machine is used to draw  

Bench marks are fixed by 

The relatively fixed point of known elevation above datum, is called 

The temperature measuring device ‘Thermometer’ is invented by………. 

Slump test of concrete measures of its