Heating of dry steam above saturation temperature is known as_____________________?

Related Mcqs:

1. Heating wet steam at constant temperature is heating it at constant_________________?

   A. volume
   B. pressure
   C. entropy
   D. enthalpy
   E. none of the above

2. The saturation temperature of steam with increase in pressure increases____________________?

   A. linearly
   B. rapidly first and then slowly
   C. slowly first and then rapidly
   D. inversely
   E. none of the above

3. 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

4. Heating value of fuel used is as on fired basis. If it is reported for dry or moisture free fuel, then latter should be multiplied by the following factor to correct for as fired value ___________________?

   A. (1- moisture content)
   B. (1 + moisture content)
   C. 1 + moisture content
   D. 1 – moisture content

5. The dry saturated steam at very high pressure (150-200 kg/cm2) when throttled to atmosphere will become_______________?

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

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. Latent heat of dry steam at atmospneric pressure is equal to____________________?

   A. 539 kcal/kg
   B. 539 BTU/lb
   C. 427 kcal/kg
   D. 100 kcal/kg
   E. 471 kcal/kg

8. If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by___________________?

   A. throttling calorimeter
   B. separating calorimeter
   C. combined separating and throttling calorimeter
   D. bucket calorimeter
   E. none of the above

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

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

10. 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