Will you please give me ISRO Engineer mechanical engineering recruitment examination ?

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A manometer measures the pressure differential between two locations of a pipe carrying water. If the manometric liquid is mercury (specific gravity 13.6) and the manometer showed a level difference of 20 cm, then the pressure head difference of water between the two tapings will be
Flow takes place at Reynolds Number of 1500 in two different pipes with relative
roughness of 0.001 and 0.002. The friction factor
a) Will be higher for the pipe with relative roughness of 0.001
b) Will be higher for the pipe having relative roughness of 0.002 1
c) Will be the same in both the pipes -/
d) In the two pipes cannot be compared on the basis of data given

A liquid compressed in cylinder has a volume of 0.04 m%t 50 kg/cm2 and a volume of
0.039 m3 at I50 kg/cm2. The bulk modulus of elasticity of liquid is
a) 400 kg/cm2 b) 40 x 1 o6 kg/cm2 c) 40 x lo5 kg/cm2 d) 4000 kg/cm2

A fluid jet is discharging from a 100 mrn nozzle and the vena contracta formed has a
diameter of 90 mm. If the coefficient of velocity is 0.95, then the coefficient of
discharge for the nozzle is
a) 0.7695 b) 0.81 c) 0.9025 d) 0.855
A fully developed laminar viscous flow through a circular tube has the ratio of
maximum velocity to average velocity as
a) 3.0 b) 2.0 r) 2.5 d) 1.5

If the surface tension of water-air interface is 0.073 N/nn, the gauge pressure inside a
rain drop of 1 mm diameter will be
a) 0.146 ~/m' b) 73 ~/m' c) 146 ~ / m ' d) 292 ~/m' u
A stream function is given by (x2 - -y2). The potential function of the flow will be
a) 2xy + f(x) b) 2 (x2 - 9) c) -2xy + constant d) 2xy + f (y)

The temperature profile between two metal wai!s joined
- . together is shown in Fig. From the figure it can be concluded
that z 55cc
I I
a) Eleat flo145 from .A, to B b) Heat flows frorr B to A
e) Heat is generated at the interface d) A is bad conductcji- of heat

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