11. Demand factor is defined as___________? A. average load/maximum load. B. maximum demand/connected load C. connected load/maximum demand. D. average load x maximum load ✅ The correct answer is option B.
12. The percentage O2 by Weight in atmospheric air is____________? A. 18% B. 23% C. 77% D. 79% ✅ The correct answer is option B.
13. Which of the following device is used to measure vacuum? A. Barometer B. Hygrometer C. U-tube manometer D. Venturi metre ✅ The correct answer is option C.