13. A journal bearing has an oil film of 0.01 mm thickness and rotates at a speed of 1000 rpm. The power lost in viscous friction is 240 W. a. If the oil film thickness becomes 0.012 mm due to wear of the sleeve and speed remains 1000 rpm, the power lost becomes: i) the same 240 W ii) 280 W iii) 200 W b. If the speed of rotation is increased to 2000 rpm and film thickness remains 0.01 mm, the power lost becomes: i) 120 W ii) 480 W iii) 960 W 14. If the temperature of the oil used in the bearing is increased and the other parameters remained constant. The heat generated in the oil due to viscous friction per second will: i) increase ii) decrease 15. On increasing the pressure on a liquid excessively, a. The volume of the liquid iii) remain constant i) increases ii) decreases iii) remains constant