In a regenerative surface condenser_____________?
(A) there is one pump to remove air and condensate
(B) there are two pumps to remove air and condensate
(C) there are three pumps to remove air, vapour and condensate
(D) there is no pump, the condensate gets removed by gravity
In a steam power plant, the function of a condenser is__________?
(A) to maintain pressure below atmospheric to increase work output from the primemover
(B) to receive large volumes of steam exhausted from steam prime mover
(C) to condense large volumes of steam to water which may be used again in boiler
(D) all of the above
Edward’s air pump____________?
(A) removes air and also vapour from condenser
(B) removes only air from condenser
(C) removes only un-condensed vapour from condenser
(D) removes air alongwith vapour and also the condensed water from condenser
The cooling section in the surface condenser__________?
(A) increases the quantity of vapour extracted along with air
(B) reduces the quantity of vapour extracted along with air
(C) does not affect vapour quantity extracted but reduces pump capacity of air extraction pump
(D) none of the above
In a surface condenser if air is removed, there is___________?
(A) fall in absolute pressure maintained in condenser
(B) rise in absolute pressure maintained in condenser
(C) no change in absolute pressure in the condenser
(D) rise in temperature of condensed steam
In a shell and tube surface condenser____________?
(A) steam and cooling water mix to give the condensate
(B) cooling water passes through the tubes and steam surrounds them
(C) steam passes through the cooling tubes and cooling water surrounds them
(D) all of the above varying with situation
In jet type condensers___________?
(A) cooling water passes through tubes and steam surrounds them
(B) steam passes through tubes and cooling water surrounds them
(C) steam and cooling water mix
(D) steam and cooling water do not mix
The thermal efficiency of the engine with condenser as compared to without condenser, for a given pressure and temperature of steam, is_____________?
(A) higher
(B) lower
(C) same as long as initial pressure and temperature is unchanged
(D) none of the above
In steam turbines the reheat factor_____________?
(A) increases with the increase in number of stages
(B) decreases with the increase in number of stages
(C) remains same irrespective of number of stages
(D) none of the above
Steam turbines are governed by the following methods_____________?
(A) Throttle governing
(B) Nozzle control governing
(C) By-pass governing
(D) all of the above