Power Plant Engineering In Ee - Study Mode

[#61] The draught in locomotive boilers is produced by
Correct Answer

(C) steam jet

[#62] The percentage O 2 by volume in atmosphere air is
Correct Answer

(A) 21%

[#63] In a surface condenser if air is removed, there is
Correct Answer

(A) fall in absolute pressure maintained in condenser

[#64] Economiser is used to heat
Correct Answer

(B) feed water

Explanation

Solution: An economiser is used to heat feed water . Feed water: This is the water supplied to the boiler to generate steam. The economiser increases the temperature of the feed water by utilizing the heat from the flue gases exiting the boiler. Purpose: By heating the feed water, the economiser improves the overall efficiency of the boiler by recovering waste heat, thus reducing fuel consumption. Not used for: Heating air or flue gases, although it works with the heat from flue gases to perform its function.

[#65] Where unpulverised coal has to be used and boiler capacity is large, the stoker which is used is
Correct Answer

(B) overfeed stoker