Pick up the wrong statement about supercharging __________________?

Related Mcqs:

1. Supercharging is the process of_____________________?

   A. supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere
   B. providing forced cooling air
   C. injecting excess fuel for raising more load
   D. supplying compressed air to remove combustion products fully
   E. raising exhaust pressure

2. The reason for supercharging in any engine is to________________?

   A. increase efficiency
   B. increase power
   C. reduce weight and bulk for a given out-put
   D. effect fuel economy
   E. none of the above

3. Supercharging is essential in_____________?

   A. diesel engines
   B. gas turbines
   C. petrol engines
   D. aircraft engines
   E. marine engines

4. Pick up the wrong statement?

   A. 2-stroke engine can run in any direction
   B. In 4-stroke engine, a power stroke is obtained in 4-strokes
   C. thermal efficiency of 4-stroke engine is more due to positive scavenging
   D. petrol engines work on otto cycle
   E. petrol engines occupy more space than diesel engines for same power output

5. Pick up the wrong statement?

   A. aluminium in steel results in excessive grain growth
   B. manganese in steel induces hardness
   C. nickel and chromium in steel help in raising the elastic limit and improve the resilience and ductility
   D. tungsten in steels improves magnetic properties and hardenability
   E. sulphur, phosphorous and lead im¬prove machining properties of steel

6. Pick up the wrong statement Nickel and chromium in steel help in _________________?

   A. providing corrosion resistance
   B. improving machining properties
   C. providing high strength at elevated temperatures
   D. raising the elastic limit
   E. improving the resilience and ductility

7. Pick up wrong statement about wrought iron ?

   A. It contains carbon of the order of 0 to 0.25%
   B. It melts at 1535°C
   C. It is very soft and ductile
   D. It can be easily forge welded
   E. It is made by adding suitable percent¬age of carbon to molten iron and subjecting the product to repeated hammering and rolling

8. Pick up the wrong statement about critical condition of steam___________________?

   A. latent heat is zero
   B. liquid directly becomes steam
   C. specific volume of steam and liquid is same
   D. this is the maximum pressure limit
   E. all properties of liquid and steam are same

9. Pick up the wrong statement about water tube boiler in comparison to fire tube boilers ______________________?

   A. former generates steam at high pressure
   B. former occupies less space for same power
   C. rate of steam flow is more in former case
   D. former is used for high installed capacity
   E. chances of explosion are less in former case

10. Pick up wrong statement about desired properties of a good fuel__________________?

    A. high calorific value
    B. produce minimum smoke and gases
    C. ease in storing
    D. high ignition point
    E. ecomomical