Amount of vaccum level required in high speed train loco is A. 50 cm B. 55 cm C. 56 cm D. None of these

The correct answer is: None of these.

The amount of vacuum level required in a high-speed train locomotive is not a fixed value. It depends on a number of factors, including the weight of the train, the speed of the train, and the type of track. In general, however, the vacuum level required in a high-speed train locomotive is between 50 and 60 cm of mercury.

Option A: 50 cm is a possible value for the vacuum level required in a high-speed train locomotive, but it is