40 TOP FURNACE TECHNOLOGY Online Test – Multiple Choice Questions and Answers

1. Which of the following is a periodic furnace?


2. Which furnace employs natural draft ?


3. Dampers are located


4. Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about __________ percent


5. Which of the following furnaces will have maximum thermal efficiency ?


6. Which of the following is the most important deterrants to an extended use of pulverised coal in boiler firing ?


7. Test specimen for determination of refractoriness under load (RUL) of a refractory is heated in a


8. Which of the following is a directly fired intermittant furnace ?


9. In furnaces operating at very high temperature (say) 1250°C, e.g. soaking pit), the maximum heat transfer takes place by


10. In a heating process, a heat flow diagram in which the quantities of heat in the various items of a heat balance are represented by the width of a band is called the


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