Fluid Mechanics for Chemical Quiz 3

1 / 50

**Boundary layer separation occurs when the______?**

2 / 50

**Choose the correct set of dimensions of viscosity that are equivalent (where, F, M, L, T are dimensions for force, mass, length and time respectively) ?**

3 / 50

**Check valves are used________?**

4 / 50

**Buoyant force___________?**

5 / 50

**Choking in case of pipe flow means that a_____?**

6 / 50

**Centrifugal pumps as compared to reciprocating pumps___________?**

7 / 50

**Buckingham-? theorem states that in any physical problem including ?n? quantities having ?m? dimensions, the quantities can be arranged into ______ independent dimensionless parameters?**

8 / 50

**Centrifugal pump is normally classified on the basis of the_________?**

9 / 50

**Capacity of a hydraulic accumulator is defined in terms of maximum_______?**

10 / 50

**Cavitation in a centrifugal pump can be avoided by keeping the___________?**

11 / 50

**Cocks are used to control _____?**

12 / 50

**Deformation drag, which is caused by widespread deformation of fluid around the immersed body______?**

13 / 50

**Critical velocity in a pipe flow__________?**

14 / 50

**Check valve provided in the discharge line of a centrifugal pump serves the purpose of controlling the________?**

15 / 50

**Cd is always _______ Cc?**

16 / 50

**Consider two pipes of same length and diameter through which water is passed at the same velocity. The friction factor for rough pipe is f1 and that for smooth pipe is f2. Pick out the correct statement ?**

17 / 50

**Boundary layer thickness in laminar flow over a flat plate increases as(where, d = distance from the leading edge.) ?**

18 / 50

**Curve III in the bellow diagram represents a/an_________?**

19 / 50

**Centrifugal pump can?t be used to pump _______?**

20 / 50

**Cd for the orifice plate varies from _____?**

21 / 50

**Co-efficient of velocity is _____ the coefficient of discharge?**

22 / 50

**Check in a centrifugal pump is_________?**

23 / 50

**Disc compensators are provided in large diameter fuel gas carrying pipelines to__________?**

24 / 50

**Check valve is used for _________ flow?**

25 / 50

**Co-efficient of discharge (Cd) is defined as actual discharge/theoretical discharge and is equal to Cc . Cv; where Cc = Co-efficient of contraction and Cv = co-efficient of velocity. Cd of an orifice is usually about___________?**

26 / 50

**Creeping flow around a sphere is defined, when particle Reynolds number is_____?**

27 / 50

**Choose the set of pressure intensities that are equivalent ?**

28 / 50

**Capillary tube method of viscosity measurement is based on the _________?**

29 / 50

**Centrifugal compressors compared to reciprocating compressors___________?**

30 / 50

**Boundary layer thickness in turbulent flow over a flat plate increases as(where, d = distance from the leading edge.) ?**

31 / 50

**Differential manometer measures the_____?**

32 / 50

**Dimension of surface tension is (where, F = force, L = length) ?**

33 / 50

**Dimension of absolute viscosity is__________?**

34 / 50

**Diaphragm pumps are used to transport__________?**

35 / 50

**Consider a centrifugal pump having a specific impeller diameter, fixed impeller speed pumping a liquid of constant density at a particular discharge capacity. With decrease in the capacity of the pump, the ________ decreases?**

36 / 50

**Capacity of a rotary gear pump can be varied by___________?**

37 / 50

**Cp/Cv is termed as___________?**

38 / 50

**Diaphragm valves are used for handling ________ fluids?**

39 / 50

**Capillary rise of mercury in a small diameter tube is proportional to (where, d = diameter of the tube, ? = surface tension of mercury)______?**

40 / 50

**Dean number is concerned with the______?**

41 / 50

**Design of the casing of centrifugal pump should be such as to minimise the_________?**

42 / 50

**Cavitation can be prevented by_________?**

43 / 50

**Centre of pressure in an immersed body is _______ the centre of gravity?**

44 / 50

**Centre of pressure of a plane surface of arbitrary shape immersed vertically in a static mass of fluid_________?**

45 / 50

**Differential manometer measures the______?**

46 / 50

**Cavitation occurs in a centrifugal pump when the suction pressure is_________?**

47 / 50

**Brownian movement is prominent in the particle size range of ______ microns in case of settling of a particle in a fluid?**

48 / 50

**Dimension of kinematic viscosity is_______?**

49 / 50

**Colebrook equation for friction factor in turbulent flow is given by, f-0.5 = -4 loge [(?/D) + (1.26/NRe ?F). It reduces to Nikuradse equation for a value of (?/D) equal to ___________?**

50 / 50

**Cavitation in a pump creates so many undesirable effects. Out of the following, which is not an undesirable effect created by cavitation ?**

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