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2nd September 2014, 08:44 AM
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Bharat Earth Movers Limited Mechanical Engineering previous year question papers

Will you please share with me the Bharat Earth Movers Limited Mechanical Engineering previous year question papers?
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  #2  
2nd September 2014, 09:58 AM
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Join Date: Apr 2013
Re: Bharat Earth Movers Limited Mechanical Engineering previous year question papers

As you want to get the Bharat Earth Movers Limited Mechanical Engineering previous year question papers so here it is for you:

1. A hydraulic pres has a ram of 15 cm diameter and plunger of 1.5 cm.
It is required to lift a mas of 1000kg. The force required on plunger is
nearly equal to
a) 10N b) 100N c) 100N d) 1ON
Ans.
2. If the stream function is given by Ψ= 3xy, then the velocity at a point
(2, 3) wil be
a) 7.21 unit b) 18 unit c) 10.82 unit d) 54 unit
Ans.
3. The corect sequence of the centrifugal, pump components through
which the fluid flows is
a) Impeler, Suction pipe, Fot valve and strainer, Delivery pipe
b) Fot valve and strainer, Suction pipe, Impeler, Delivery pipe
c) Impeler, Suction pipe, Delivery pipe, Fot valve and strainer
d) Suction pipe, Delivery pipe, Impeler, Fot valve and strainer
Ans.
4. The relation p = constant, where y is the ratio of the specific heats of
ideal gas, is applicable to
a) Any adiabatic proces
b) Only reversible adiabatic proces
c) Only ireversible adiabatic proces
d) Only isothermal proces
Ans.5. Acros a normal shock
a) static presure and the static temperature rise
b) entropy remains constant
c) velocity and static presure decrease
d) density and temperature decrease
Ans.
6. A necesary precaution in selection of pumps for paralel operations is
that
a) H-Q characteristics of both should be identical
b) Both pumps should be centrifugal type
c) Both pumps should be identical
d) There should not be change from positive to negative slope In H-Q curve
Ans.
7. A metalic cube of side 10 cm, density 6.8 gm/c is floating in liquid
mercury (density 13.6gm/c), with 5 cm height of cube exposed above
the mercury level. Water (density 1 gm/c) is filed over this, to
submerge the cube fuly. The new height of cube exposed above mercury
level is
a) 4.6 cm b) 5.4 cm c) 5.0 cm d) 5.8 cm
Ans.
8. The presure drop for a relatively low Reynolds number flow in a 600
mm, 30 m long pipeline is 7OkPa. What is the wal shear stres?a) 0 Pa b) 140 Pa c) 70 Pa d) 350 Pa
Ans.
9. The radiative heat ransfer rate per unit area (W/m2) betwen two
plane paralel grey surfaces (emisivity 0.9) maintained at 400 K and
300 K is (Stefan Boltzmann constant σ = 5.67 x 10 W/m2k4)
a) 1020 b) 464 c) 812 d) 567
Ans.
10. At the eye tip of a centrifugal impeler, blade velocity is 200 m/s
while the uniform axial velocity at the inlet is 150 m/s. If the sonic
velocity is 300 m/s, then the inlet Mach number of the flow wil be
a) 0.75 b) 0.6 c) 0.90 d) 0.83
Ans.
11. The transition Reynolds number for flow over a flat plate is 5* 105. What is the distance from the leading edge at which transition wil ocur
for flow of water with a uniform velocity of 1 m/s? (For water. the
kinematic viscosity, v = 0.86* 10-6 m2/s)
a) 0.43m b) 1m c) 43m d) 103m
Ans.
12. For a reciprocating water pump having cylinder dia d and crank
radius r, if W is the weight of water lifted, the coeficient of discharge isa) 2 b) 2
2 c) 2 d) 2
Ans.
13. Both fre vortex and forced vortex can be expresed mathematicaly
in terms of tangential velocity V at the coresponding radius r. Chose
the corect combination
Fre vortex Forced vortex
a) V r x const. Vr = const.
b) V2 x r = const. V = r x const.
c) V x r = const. V2 = r x const.
d) V x r = const. V = r x const.
Ans.
14. A bucket of water is hanging from a spring balance. An iron piece is
suspended into water without ouching sides of bucket from another
support. The spring balance reading wil
a) Remain same
b) Decrease
c) Increase
d) Increase/decrease depending on depth of immersion
Ans.
15. A single-stage impulse turbine with a diameter of 120 cm runs at
3000 rpm. If the blade sped ratio is 0.42 then, the inlet velocity of steam
wil be
a) 79m/s b) 18m/s c) 450m/s d) 90m/sAns.


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