Superheating of steam is done at_________________?

Related Mcqs:

1. One kg of steam sample contains 0.8 kg dry steam; it’s dryness fraction is__________________?

   A. 0.2
   B. 0.8
   C. 1.0
   D. 0.6
   E. 0.5

2. In an experiment to determine dryness fraction of steam, the mass of water separated was 1.2 kg in 15 mts and the mass of steam passed out in same time was 4.8 kg. Dryness fraction is__________________?

   A. 40%
   B. 25%
   C. 50%
   D. 80%
   E. 90%

3. Expanding steam to a very low pressure (high vacuum) in steam engines is _________________?

   A. desirable
   B. economical
   C. essential
   D. optional
   E. uneconomical

4. Vacuum for reciprocating steam engines compared to steam turbines is__________________?

   A. more
   B. equal
   C. less
   D. could be more or less depending on the size of plant
   E. none of the above

5. In carburettors, the top of the fuel jet with reference to the level in the float chamber is kept at_________________?

   A. same level
   B. slightly higher level
   C. slightly lower level
   D. may be anywhere
   E. varies from situation to situation

6. The dry saturated steam at very low pressure, (5-10 kg/cm2) when throttled to atmosphere will become________________?

   A. wet
   B. superheated
   C. remain dry satruated
   D. dry
   E. none of the above

7. Which of the following is steam dbal?

   A. non-coking bituminous coal
   B. brown coal
   C. pulverised coal
   D. coking bituminous coal
   E. none of the above

8. The change in internal energy in steam engines equals to__________________?

   A. work done during the rankine cycle ;
   B. work done during compression.
   C. work done during adiabatic expansion
   D. change in enthalpy
   E. none of the above

9. The steam temperature with increase in load in case of a boiler fitted with radiation super heater________________?

   A. increases
   B. decreases
   C. remains unaffected
   D. first increases and then decreases
   E. unpredictable

10. In ordetjo obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will _________________?

    A. remain unaffected
    B. improve C. worsen
    C. may improve/worsen depending on size
    D. unpredictable