Related Mcqs:

1. 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

2. Velocity of a gas in sound is not proportional to (where, T = Absolute temperature of the gas. P = Absolute pressure of the gas. y = Ratio of specific heats (Cp/Cv) ρ = specific weight of the gas) ?

   A. √T
   B. 1/√P
   C. √y
   D. 1/√ρ

3. The type of pump used for lifting large quantity of sewage is a _________________ pump ?

   A. Gear
   B. Centrifugal
   C. Reciprocating
   D. Plunger

4. In Newton’s law of viscosity, which states that the shear stress is proportional to the _____________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, Vg = velocity gradient) ?

   A. V2
   B. 1/V2
   C. 1/Vg
   D. Vg

5. In case of a, centrifugal pump, the ratio h1/h2 is termed as the _____________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller)?

   A. Mechanical
   B. Overall
   C. Volumetric
   D. Impeller

6. Thermal efficiency of an internal combustion engine is around ______________ percent?

   A. 8
   B. 35
   C. 65
   D. 80

7. 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

8. Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by_________________?

   A. Conduction
   B. Convection
   C. Radiation
   D. Both A. & B.

9. For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be___________________?

   A. 100% indirect reduction
   B. 100% direct reduction
   C. 50-60% indirect reduction
   D. 30-40% indirect reduction

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

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