Which of the following gases has the highest calorific value ________________?

Related Mcqs:

1. Which of the following coals has the highest calorific value_________________?

   A. anthracite coal
   B. bituminous coal
   C. lignite
   D. peat
   E. wood

2. Calorific value of coal is of the order of _______________________?

   A. 200-400 kcal/kg
   B. 800-1200 kcal/kg
   C. 2000-4000 kcal/kg
   D. 5000-8000 kcal/kg
   E. 8000-10,000 kcal/kg

3. The average calorific value of wood is about : __________?

   A. 33500 kj/kg
   B. 25000 kj/kg
   C. 23000 kj/kg
   D. 19700 kj/kg

   Submitted by: Faheem Zaman Dhaunroo

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. Gardually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of__________________?

   A. higher effectiveness of boiler
   B. high calorific value coal being burnt
   C. fouling of heat transfer surfaces
   D. raising of steam temperature
   E. leakage of air

6. The temperature of flue gases at air heater outlet should be__________________?

   A. 100°C
   B. above dew-point temperature of flue gases
   C. below dew-point temperature of flue gases
   D. less than wet bulb temperature of flue gases
   E. above wet bulb temperature of flue gases

7. In the case of petrol engine at maximum output, the percentage of CO in exhaust gases is ____________________?

   A. Zero
   B. 5-10%
   C. Depends on load and quality of fuel
   D. Considerable percent

8. In the case of compression ignition engine, the %age of CO in exhaust gases is________________?

   A. Zero
   B. 5-10%
   C. Depends on load
   D. Considerable percent

9. For very great pressures, viscosity of moss gases and liquids__________________?

   A. remains same
   B. increases
   C. decreases
   D. shows erratic behavior
   E. none of the above

10. Auto-ignition reaction time for petrol engine first decreases with increase in fuel air ratio, reaches a minimum value and then increases with subsequent increase in fuel air ratio. The minimum value occurs in the region of________________?

    A. Lean mixture
    B. Chemically correct fuel air ratio
    C. Rich mixture
    D. Unpredictable