143) The reflectivity depends upon

144) The indicated power for multi-cylinder engine will be same as that of a single cylinder engine.

145) In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have

146) The size of a reactor at which the chain reaction can be initiated (i.e. when system becomes critical) with just enough fissionable material (called critical mass of fuel) is known as critical size of reactor.

147) A gas engine has a swept volume of 300 cm³ and clearance volume of 25 cm³. Its volumetric efficiency is 0.88 and mechanical efficiency is 0.90. The volume of the mixture taken in per stroke is