the questions with 2 marks, means that there is 2 answers are correct

(i) The Heat Traanfer Vector, Q (ii) Convection heat uranter depends genenaify os What is ahwou true about Q for heat conduction? which parameten ? a) The dsrecton of heat flow is parallel to the b) The direction of heat flow is perpendicutar to a) A,p,Cp,v(x,y,z,t), (es) ,k,,Cz,(x,y,z,t),c,G Gometry the isotierm. e) u,k,p,C,,v(x,y,z,t) c) The direction of heat flow is parallel to d) k,Cp,y(x,y,z,t), Geometry the local surface area e) H,k,,Gp, , Geonetry d) The direstion of beat fow is perpendicular to the local surfice area. (iii) What is true aboet the "heat trassfer [1 mark) [1 mark| coefficient n ? (iv) A plate of thichsess L suspended vertically in cool air at T. Which of the following beundary conditions apply ? a) h=f(x,Re,Pr) (b) h=kfhurd.(T/ay)y=d/(TzTs) a) T=Tm at x=0 and L. b) T(L/2)/x=0 for all times. c) T(L/2)/x=0 for t=0 only d) h=1/L0thrdx (d) k,T(L,t)/x=h[T(L,t)T] c) k,dT(L,t)/x=h[T(L,t)Tm] [2 marks] (2 marks ) (v) What is abways true when using the (vi) What is the meaning of the Fourier number, Fo? a) Characteristic length is equal to the dfameter a) Fot2t/a b) Conductivity k is for the fluid (b) Relative rate of heat conducted to thermal c) Conductivity k is for the solid (d) Lumped analysis is valid for Bi