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The relation between shear stress Z and velocity gradient (#) of a fluid given by
0

೫ಎ ചു where A and n are constants. If n <1, What type of fluid will it be?
0

(^) Newtonian fluid ൯) Dilatant
(0 Pseudoplastic (D) Bingham plastic

The speed of water in a hose increased from 2m/s to 25m/s going from hose to the nozzle,
given the absolute pressure in the nozzle is 1x10°N/m* (atmospheric) assuming level
frictionless flow. Calculate the pressure in the hose (density of water 1000 kg/m?) :

^) 4.10x10°N/m? (B) 3.10x10°N/m?
(0) 2.10x10°N/m? (D) 5.24x10°N/m?

Pelton wheel is used in those places where :
(A) high head and low discharge are available
(3) _ low head and high discharge are available
(C) high head and high discharge are available
(D) none of the above

The thermal conductivity of a solid depends upon the solids temperature as K =aT +b,
where a and b are constants. The temperature of the planar layer of this solid as it conducts
heat is given by:

(A) aT +b=x+C, @) न+ = ८ +©,
(0 aT? +b6T - ‏و0 + م0‎ ௫ 473.87 ಲಿಲ್ಲಿ

The thermal resistance of heat conduction through a hollow sphere of inner 7೩೮615 7 ೩೧೮
outer radius r,is:

(A) ‏وعدا‎ @ 2
Ar kr,r,
(€) ‏اف‎ (D) യ്മ

477:77

It is proposed to coat a 1 mm diameter with enamel paint (k = 0.1 w/mk) to increase the heat
transfer with air. If the air side heat transfer coefficient is 100 w/m?k, the optimum thickness
of enamel paint should be :

(^) 0.25mm (B) 1mm
(C) 0.5mm (D) 2mm

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