engineering recuitment BARC Stipendiary Trainee Category II 2023 Mock Test Power Systems Circuit Breakers
Which of the following statements is not correct?
1
SF6 is non-toxic and non-flammable gas
2
SF6 has very high dielectric strength roughly 2.4 times of that of air
3
SF6 is yellow in colour
4
SF6 is about 100 times more effective than air at 20°C