Otto cycle used in spark ignition petrol engines is also known as the constant ________________ cycle?

Related Mcqs:

1. Air standard Otto cycle is more efficient than the diesel cycle for the same__________________?

   A. Heat addition & compression ratio
   B. Heat addition & pressure
   C. Compression ratio & pressure
   D. Cylinder dimension & rpm

2. Air-petrol ratio in an automotive petrol engine is around ________________?

   A. 14 : 1
   B. 22 : 1
   C. 25 : 1
   D. 4 : 1

3. Carnot cycle is also termed as the constant _________________ cycle in thermodynamics?

   A. Entropy
   B. Pressure
   C. Volume
   D. Heat

4. Spark plug is provided in a/an_________________?

   A. Engine having carburettor
   B. Diesel engine
   C. Compression ignition engine
   D. Both B. & C.

5. In practice, the compression ratio of compression-ignition (CI) engine ranges from ______________________?

   A. 15 to 25
   B. 5 to 10
   C. 40 to 55
   D. 60 to 70

6. Thermodynamic cycle involved in the working of a thermal power plant is the ______________ cycle ?

   A. Joule
   B. Carnot
   C. Rankine
   D. Brayton

7. Gas turbine normally employs a constant _______________ cycle?

   A. Pressure
   B. Temperature
   C. Volume
   D. None of these

8. Glycerine is used as a coolant in cooling of some engines instead of water, because___________________?

   A. Its higher boiling point (290°C) increases its heat carrying capacity
   B. Comparatively less weight of coolant is required
   C. Smaller radiator can be used
   D. All a, b & c

9. Co-efficient of performance of a Carnot cycle refrigerator operating between – 23°C and + 27°C is ________________?

   A. 3
   B. 5
   C. 0.5
   D. 1.5

10. Moist air is cooled along the line of constant ________________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs ?

    A. Enthalpy
    B. Relative humidity
    C. Wet bulb temperature
    D. Dew point temperature