Mechanical Engineering : Steam Boilers QUESTIONS AND ANSWERS :: part8 : 16 to 20
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
16.In water wall furnace, the heat is transferred to the water-walls by |
convection |
radiation |
conduction |
radiation and conduction |
radiation and convection. |
17.In ordered obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will |
remain unaffected |
improve |
worsen |
may improve/worsen depending on size |
unpredictable. |
18.The balanced draft furnace is one using |
induced draft fan and chimney |
induced draft fan and forced draft fan |
forced draft fan and chimney |
any one of the above |
none of the above. |
19.De aeration of feed water is carried out because it reduces |
cavitation of .boiler feed pumps |
corrosion caused by oxygen |
heat transfer coefficient |
pH value of water |
weight of water to be handled. |
20.The feed check valve is used in order to |
regulate flow of boiler water |
check level of water in boiler drum |
recirculate unwanted feed water |
allow high pressure feed water to flow to drum and not allow reverse flow to take place |
none of the above. |
More Steam Boilers QUESTIONS AND ANSWERS available in next pages
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