# Mcq on impact of jets

## The mechanical Engineering in that the fluid mechanics is crucial role to all Competitive exams, so let's learn about topic of Mcq on impact of jets  to clear all the concepts.So keeping these things, Lets understand the  new concept of Mcq on impact of jets. Mcq on impact of jets

### Objective questions MCQ on impact of jets is as follows:-

1. The Principle of fluid mechanics working on the utilizations of the.....
a) mass
b) Volume
c) Work
d) Velocity

2. Which is not a type of jet engines.
a) Turbo jet
b) Ram jet
c) Scram jet
d) Propulsive jet

3.  The turbojet does not consist of.....
a) Compressor parts
b) Combustion chamber part
c) Gas turbine part
d) Air filter part

4. Which of the following part consists in turbojet engine.
a) Compressor parts
b) Combustion chamber part
c) Gas turbine part
d) All of the above

5. The Jet propulsion of ship in that shallow water is needs to avoid damage of the propeller.
A. True
B. False

6. The Jet propulsion of ship is less efficient than the screw propeller.
A. True
B. False

7. The main reason for more efficiency of screw propeller is due to.......
a) Pressure
b) Temperature
c) Frictional losses
d) Wear and tear

8.  The jet strikes for a curved plate at position of the....
a) Sides
b) Surface
c) Centre
d) Does not strike

9. The efficiency of vane is........
a) 1-V22/ V12
b) 1+(V22/ V12)
c) V22/ V12
d) 1+ V12

10. The strikes of jet for curved plate at its centre of plates.
A. True
B. False

11. The pressure are constant in jet then velocity is...
a) Vr1 < Vr2
b) Vr1 = Vr2
c) Vr1 > Vr2
d) Vr2 is a zero

12.  For the frictionless flow from jet, velocities are...
a) Vr1 < Vr2
b) Vr1 = Vr2
c) Vr1 > Vr2
d) Vr2 is a zero

13. The relative velocity is calculated by using which of the following equations.
a) u – V1
b) V1
c) u/V1
d) u×V1

14. How is absolute velocity at inlet denoting 8n jet propulsion.
a) V
b) V1
c) C
d) v

15. The working principle of Jet propulsion on which of the following in law.
a) Newton’s 1st law
b) Newton’s 2nd law
c) Newton’s 3rd law
d) Thermodynamic properties

16. The Newton third law gives principle of jet propulsion.
A. True
B. False

17. The force analysis on the curved vane is getting by....
a) Velocity triangles
b) Angle of plate
c) Vane angles
d) Plate size

18. The propulsive force driving the jet in....
a) Backward direction
b) Forward direction
c) Perpendicular direction
d) Parallel movement

19. The force exerted by jet of water on the fixed plate is
A. ρAv^2
B. ρA (v-u)^2
C. ρAv^2 sinθ
D. ρAv^2 (1+cosθ)

20. The force exerted by jet of water on the inclined plate is
A. ρAv^2
B. ρA (v-u)^2
C. ρAv^2 sinθ
D. ρAv^2 (1+cosθ)

21. The force exerted by jet of water on the moving vertical plate is
A. ρAv^2
B. ρA (v-u)^2
C. ρAv^2 sinθ
D. ρAv^2 (1+cosθ)

22. The force exerted by jet of water on the moving inclined plate is
A. ρAv^2
B. ρA (v-u)^2 sin^2.θ
C. ρAv^2 sinθ
D. ρAv^2 (1+cosθ)

23. The force exerted by jet of water on the fixed curved plate is
A. ρAv^2
B. ρA (v-u)^2 sin^2.θ
C. ρAv^2 sinθ
D. ρAv^2 (1+cosθ)

24. The force exerted by jet of water on the fixed curved plate at one end tangentially when the plate is symmetric is
A. ρAv^2
B. ρA (v-u)^2 sin^2.θ
C. 2.ρAv^2 cosθ
D. ρAv^2 (1+cosθ)

25. The force exerted by jet of water on the fixed curved plate at one end tangentially when the plate is unsymmetric is
A. ρAv^2 (cosθ+cosϕ)
B. ρA (v-u)^2 sin^2.θ
C. 2.ρAv^2 cosθ
D. ρAv^2 (1+cosθ)

26. The force exerted by jet of water on the  moving curved plate in direction of jet is
A. ρAv^2
B. ρA (v-u)^2 (1+cosθ)
C. ρAv^2 sinθ
D. ρAv^2 (1+cosθ)

27. The work done or power developed by jet of water on the fixed plate is
A. ρAv^2
B. ρA (v-u)^2
C. 0
D. ρAv^2 (1+cosθ)

28. The work done or power developed by jet of water on the inclined plate is
A. ρAv^2
B. ρA (v-u)^2
C. 0
D. ρAv^2 (1+cosθ)

29. The work done or power developed by jet of water on the moving vertical plate is
A. ρAv^2
B. ρA (v-u)^2 × U
C. ρAv^2 sinθ
D. ρAv^2 (1+cosθ)

30. The work done or power developed by jet of water on the moving inclined plate is
A. ρAv^2
B. ρA (v-u)^2 sin^2.θ × U
C. ρAv^2 sinθ
D. ρAv^2 (1+cosθ)

31. The  work done or power developed by jet of water on the fixed curved plate is
A. 0
B. ρA (v-u)^2 sin^2.θ
C. ρAv^2 sinθ
D. ρAv^2 (1+cosθ)

32. The work done or power developed by jet of water on the fixed curved plate at one end tangentially when the plate is symmetric is
A. ρAv^2
B. ρA (v-u)^2 sin^2.θ
C. 0
D. ρAv^2 (1+cosθ)

33. The work done or power developed by jet of water on the fixed curved plate at one end tangentially when the plate is unsymmetric is
A. ρAv^2 (cosθ+cosϕ)
B. ρA (v-u)^2 sin^2.θ
C. 2.ρAv^2 cosθ
D. 0

34. The work done or power developed by jet of water on the  moving curved plate in direction of jet is
A. ρAv^2
B. ρA (v-u)^2 (1+cosθ)
C. ρAv^2 sinθ
D. ρAv^2 (1+cosθ) × U

35. The condition for maximum power in impact of jets is...
A. U= V/2
B. U= V×2
C. U= V/4
D. V= U/2

36. In impact of jets The maximum efficiency corresponding to maximum power is....
A. 66.67%
B. 65%
C. 50%
D. 45%

37. The power developed by the jet striking on fixed plate is zero.
A. True
B. False

38. Lawn sprinkler is a best example of moment of momentum equation.
A. True
B. False

39. The force exerted by jet of water on the  hinged plate in direction of jet is
A. ρAv^2
B. ρA (v-u)^2 (1+cosθ)
C. ρAv^2 cosθ
D. ρAv^2 (1+cosθ)

40. The value of bulk modulus of a fluid is required for a determine to....
A. Reynolds number
B. Mach number
C. Froude number
D. None of the above

41. The pressure at a stagnation point is always low.
A. True
B. False

42. Stagnation point in compressible flow where velocity of the fluid is zero.
A. True
B. False

43. The flow is called hypersonic if the Mach number is....
A. Unity
B. Less than unity
C. 1 to 6
D. More than 6

44. A flow called Sonic if the Mach number is unity.
A. True
B. False

45. The flow is called sonic if the Mach number is....
A. Unity
B. Less than unity
C. 1 to 6
D. More than 6

46. The flow is called sub-sonic if the Mach number is....
A. Unity
B. Less than unity
C. 1 to 6
D. More than 6

47. For the subsonic flow the Mach number is less than unity.
A. True
B. False

48. For the hypersonic flow the Mach number is unity.
A. True
B. False

49. For the hypersonic flow the Mach number is more than 6.
A. True
B. False

50. For the one dimensional flow the flow takes place in a straight line.
A. True
B. False

Here we concluding, If you have any queries about the topic of Mcq on  impact of jets,  then feel free to comment below.

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