Related Mcqs:

1. Which of the, following is not associated with the functioning of a petrol engine ?

   A. Compression ignition system
   B. Spark plug
   C. Carburettor
   D. Otto cycle

2. Which of the following performance characteristics of a S.I engine is not affected by the front end volatility of the petrol used ?

   A. Vapour locking
   B. Hot starting
   C. Spark plug fouling
   D. All A, B & C

3. 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

4. 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

5. 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

6. 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

7. With increase in compression ratio, the volumetric efficiency of air compressor____________________?

   A. Increases
   B. Decreases
   C. Remain same
   D. May increase or decrease (depends on the suction pressure)

8. The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron ?

   A. 159
   B. 1837
   C. 2537
   D. 10000

9. Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of__________________?

   A. 1 : 1
   B. 1 : 2
   C. 2 : 1
   D. 1 : 4

10. The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K) ?

    A. T
    B. 1/T
    C. T2
    D. 1/T2