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11th November 2017, 12:26 PM
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Join Date: Aug 2012
Re: ISRO Solved Question Papers

As you Asking for the Question Paper of the ISRO Scientific Engineer Recruitment Exam of Mechanical Engineering The Question Paper is given below


1 The concept of ---------------------------------- derived from the ZEROTH LAW OF THERMODYNAMICS.
TEMPERATURE

2 The concept of ------------------------------------- derived from the SECOND LAW OF THERMODYNAMICS.
ENTROPY

3 The expression for isentropic index [?] in terms of number of degrees of freedom

( n ) ------------------------
1+ [ 2 / n]

4 The critical Reynolds no upto which the viscous flow exists in pipe -------------------
2000

5 Two forces of equal magnitude P acts at right angles to each other and having same directions. Find out the expression for their resultant [R ]--------------------
[2] P

6 The angular frequency of handclock------------------
?/30 rad/s

7 The equation for free torsional vibration----------------------------
[1/2?] [q/I]


8 A thin cylinder is subjected to longitudinal stress s0 and internal pressure P , findout the maximum shearstress developed in it [ q max] ------------------------
0.5 s0

9 Rate of moment of momentum is equal to the -------------------------
Torque applied by the body

10 The expression for loss of energy [he ] due to sudden enlargement of the pipe--------
he =[v1-v2]/2g

11 A spring of stiffness K is divided into n number of springs. Each spring having stiffness ---------------------------
nK

12 The non-dimensional number corresponds to
[inertia force\compressibility force]------------------------------ Euler number

13 Equation for forced vortex flow-----------------------------
v/r = constant

14 The causes of cavitation
Metallic surfaces are damaged
Noise & vibrations

15 How to increase the thermal efficiency in Carnot cycle by-------------------------------
Decreasing low temperature

16 The slenderness ratio in columns can be obtained from the ---------------
Least radius of gyration

17 50:1 gear reduction ratio possible in-----------------
worm gear

18 Wire drawing property named as -------------------------
ductility

19 One man is standing in the elevator and the elevator is moving in the upward direction. What type of reading regarding the weight of man will we get from gauge---------------
The weight of man shown by the gauge will more the actual weight of the man.

20 LMTD for counterflow heat exchanger is compared to parallel to heat exchanger-----
More

21 The free damping equation 2y + 3y +8y =0. Calculate damping factor (D.F )--------
3/8



22 The discharges for the two parallel pipes of same lengths are Q1 & Q2 respectively and their diameters are 200 mm & 800 mm respectively. Calculate the ratio of discharge of smaller pipe to larger pipe.
1/32

23 A compressor is used to compress the air from 5 bar to 10 bar .Calculate its critical pressure [ P?]----------------------
2.64 bar

24 Equivalent twisting moment------------------------------
Te = [T + M]

25 The shear stress distribution in pipe flow -----------------------------


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