1. Match List-I with List-ll and select the correct answer using the code given below the lists:
   

   List-I	List-II
   A. Grashof number	1. Mass diffusion
   B. Schmidt number	2. Transient heat conduction
   C. Weber number	3. Free convection
   D. Fourier number	4. Forced convection
   	5. Surface tension
   	6. Radiation

   
   

1. 1. A - 4 , B - 2 , C - 3 , D - 5
      

   
   
   

   2. A - 3 , B - 1 , C - 5 , D - 2
      

   
   
   

   3. A - 5 , B - 1 , C - 2 , D - 4
      

   
   
   

   4. A - 1 , B - 2 , C - 5 , D - 4
      

   
   
   

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   NA

   Correct Option: B

   NA

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2. Grashof number signifies the ratio of
   

1. 1. inertia force to viscous force
      

   
   
   

   2. buoyancy force to viscous force
      

   
   
   

   3. buoyancy force to inertia force
      

   
   
   

   4. inertia force to surface tension force

   
   
   

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   Grashof number = inertia force ×	Buoyancy force
   	(viscous force)2

   
   
   

   Correct Option: B

   Grashof number = inertia force ×	Buoyancy force
   	(viscous force)2

   
   
   

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3. The ratio of momentum diffusivity (υ) to thermal diffusivity (α), is called
   

1. 1. Prandt number
      

   
   
   

   2. Nusselt number
      

   
   
   

   3. Biot number
      

   
   
   

   4. Lewis number

   
   
   

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   Pr =	μCp	=	ρVCp	=	V	=	V
   	k		k		k / ρCp		α

   Correct Option: A

   Pr =	μCp	=	ρVCp	=	V	=	V
   	k		k		k / ρCp		α

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4. For the fluid flowing over a flat plate with Prandtl number greater than unity, the thermal boundary layer for laminar forced convection.
   

1. 1. is thinner than the hydrodynamic boundary layer
      

   
   
   

   2. has thickness equal to zero
      

   
   
   

   3. is of same thickness as hydrodynamic boundary layer
      

   
   
   

   4. is thicker than the hydrodynamic boundary layer
      

   
   
   

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   Pr1 / 3 =	δ	, if Pr > 1 , it means δ < δt
   	δt

   Correct Option: A

   Pr1 / 3 =	δ	, if Pr > 1 , it means δ < δt
   	δt

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5. The heat transfer coefficient h in w/m²K is
   

1. 1. 0.0
      

   
   
   

   2. 4.8
      

   
   
   

   3. 6
      

   
   
   

   4. 750
      

   
   
   

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   For convection Heat flux, q = h(T_f – T_i)
   

   q = kw		dT
   		dy			w

   
   = 0.6 × 1 × 10⁴ = 6000 W/m
   

   ∴ h =	q	=	6000	= 750 W /m2K
   	(Tf – Ti)		8

   Correct Option: D

   For convection Heat flux, q = h(T_f – T_i)
   

   q = kw		dT
   		dy			w

   
   = 0.6 × 1 × 10⁴ = 6000 W/m
   

   ∴ h =	q	=	6000	= 750 W /m2K
   	(Tf – Ti)		8

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