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

Related Mcqs:

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

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

2. 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

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

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

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

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

5. A thin, flat & square plate measuring 2 m × 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m2. The plate temperature will remain constant at 30°C, if the convective heat transfer co-efficient is ________________ W/m2 °C ?

   A. 50
   B. 100
   C. 150
   D. 200

6. Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about ____________________?

   A. 9 : 1
   B. 17 : 1
   C. 23 : 1
   D. 29 : 1

7. Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be________________?

   A. 9.5 : 1
   B. 12.5 : 1
   C. 15.5 : 1
   D. 18.5 : 1

8. Alcohols are not suitable as diesel engine fuel because the cetane number of alcohols is____________________?

   A. Very low which prevents their ignition by compression
   B. Very high which prevents their ignition by compression
   C. Zero
   D. None of these

9. Joule-Thomson co-efficient is the ratio of________________?

   A. Pressure change to temperature change occuring during adiabatic compression of a gas
   B. Pressure change to temperature change occuring during adiabatic throttling of a gas
   C. Temperature change to pressure change occuring during adiabatic compression of a gas
   D. Temperature change to pressure change occuring during adiabatic throttling of a gas

10. The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 – T2)/T1. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T1 and T2 is given by_________________?

    A. T1/(T1-T2)
    B. T2/(T1-T2)
    C. T1/T2
    D. T2/T1