1. The unit of temperature in SI unit is: (A) Kilogram (B) Kelvin (C) Centigrade (D) Celsius 2. Crank case dilution is: (A) Dilution of lubricating oil (B) Dilution of diesel in crank case (C) Addition of water in crank ease (D) None of these 3. The top ring on the piston is known as: