The average calorific value of wood is about : __________?

Related Mcqs:

1. A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is _________________?

   A. 0.83
   B. 0.6
   C. 0.4
   D. 0.3
   E. none of the above

2. The calorific value of gaseous fuels is expressed in terms of__________________?

   A. kcal
   B. kcal/kg
   C. kcal/m2
   D. kcal/m²
   E. all of the above

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

   A. producer gas
   B. coal gas
   C. water gas
   D. blast furnace gas
   E. coke oven gas

4. 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

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

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

6. 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

7. 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

8. The specific fuel consumption for a petrol engine first decreases with increase in fuel air ratio and then increases with further increase in fuel air ratio. The minimum value occurs in the range of__________________?

   A. lean mixture
   B. chemically correct mixture
   C. rich mixture
   D. unpredictable
   E. none of the above

9. Hot air standard diesel cycle efficiency with increase in value of C„_______________?

   A. increases
   B. decreases
   C. remains unaffected
   D. depends on other factors
   E. unpredictable

10. Which of the following solid fuel has high caloric value : ___________?

    A. Wood
    B. Peat
    C. Bituminous coal
    D. Anthracite coal

    Submitted by: Faheem Zaman Dhaunroo