Correct answer
A. Twice
Explanation
The correct answer is Twice.
Flanges are connected to pipes by ________?
Because of its very high refractoriness of the order of ________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns?
Clausius-Clapeyron Equation gives accurate result, when the ________?
The most unsuitable reactor for carrying out reactions in which high reactant concentration favours high yields is________?
Washing soda is chemically represented by ________?
Critical speed of rotation, N (in rps – rotation per second) of a trammel is equal to (where, g = acceleration due to gravity = 9.81 m/sec2 and, r = radius of trammel, metre.)?