Steam Boilers, Engines, Nozzles and Turbines The velocity of flue gases (V) through the chimney under a static draught of (H') metres is given by V = 2gH' V = 2g/H' V = H'/2g V = 2g H' V = 2gH' V = 2g/H' V = H'/2g V = 2g H' ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The critical pressure ratio (p₂/p₁) is given by (p₂/p₁) = [2/(n + 1)] n/(n-1) (p₂/p₁) = [(n + 1)/2] n - (1/n) (p₂/p₁) = [2/(n - 1)] n/(n + 1) (p₂/p₁) = [(n - 1)/2] n + (1/n) (p₂/p₁) = [2/(n + 1)] n/(n-1) (p₂/p₁) = [(n + 1)/2] n - (1/n) (p₂/p₁) = [2/(n - 1)] n/(n + 1) (p₂/p₁) = [(n - 1)/2] n + (1/n) ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The critical pressure ratio for gases is 0.582 0.577 0.546 0.528 0.582 0.577 0.546 0.528 ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The efficiency of an impulse turbine is maximum when (where Vb = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle) Vb = 0.5 V² cosα Vb = V² cosα Vb = 0.5 V cosα Vb = V cosα Vb = 0.5 V² cosα Vb = V² cosα Vb = 0.5 V cosα Vb = V cosα ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines A safety valve usually employed with stationary boilers is Dead weight safety valve Lever safety valve High steam and low water safety valve All of the listed here Dead weight safety valve Lever safety valve High steam and low water safety valve All of the listed here ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines In order to compare the capacity of boilers, the feed water temperature and working pressure are taken as 50°C and 1.1 bar pressure 100°C and normal atmospheric pressure 100°C and 1.1 bar pressure 50°C and normal atmospheric pressure 50°C and 1.1 bar pressure 100°C and normal atmospheric pressure 100°C and 1.1 bar pressure 50°C and normal atmospheric pressure ANSWER DOWNLOAD EXAMIANS APP
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