Leakage past the piston rings and valve seats in I.C. engines with increase in speed_______________?

Related Mcqs:

1. The top piston ring nearer to the piston crown is known as_____________________?

   A. compression ring
   B. oil ring
   C. scrapper ring
   D. groove ring
   E. leading ring

2. Piston rings are usually made of___________________?

   A. cast iron
   B. aluminium
   C. phosphor bronze
   D. babbitt
   E. carbon steel

3. Piston rings are plated with chromium,cadmium or phosphate in order to__________________?

   A. reduce cost
   B. improve surface finish
   C. prevent clogging
   D. reduce wear and eliminate scuffing
   E. improve heat transfer

4. Diesel engines as compared to petrol engines require ______________________?

   A. bigger flywheel
   B. smaller flywheel
   C. same size flywheel
   D. no flywheel
   E. flywheel whose size may be less or more depending on several other fac-tors

5. The size of inlet valve of.an engine in comparison to exhaust valve is_________________?

   A. more
   B. less
   C. same
   D. more/less depending on capacity of engine
   E. varies from design to design

6. The safety valve at superheater as compared to drum safety valve setting is set at___________________?

   A. higher value
   B. lower value
   C. same value
   D. any value
   E. none of the above

7. The safety valve on boiler drum compared to safety valve on super heater is set at ________________?

   A. same value
   B. higher value
   C. lower value
   D. lower/higher depending on steam flow
   E. unpredicatble

8. In loop scavenging, the top of the piston is________________?

   A. flat
   B. contoured
   C. slanted
   D. depressed
   E. convex shaped

9. In the opposed piston diesel engine, the combustion chamber is located________________?

   A. above the piston (/;) below the piston
   C. between the pistons
   D. any when
   E. there is no such criterion

10. The knocking in diesel engines for given fuel, will be__________________?

    A. enhanced by increasing compression ratio
    B. enhanced by decreasing compression ratio
    C. unaflected by compression ratio
    D. first enhanced by increasig compression ratio upto a limit beyond which it will be suppressed
    E. dependent on other factors