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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