DRDO STA B mechanical Engineering Exam Question Paper

[SRPRADHANS]

Previous year mechanical question for senior technical assistant for drdo ,please send me all

[Raman Vij]

Hello friend as you want the DRDO STA B mechanical Engineering Exam Question Paper so here I am providing you the same please have a look…….

If 100ns is Memory Access Time & 125 microsec is 1frame period. The no. of line that
can be supported in a Time Divison Switch is
a)125 Lines
b)625 Lines
c)525 Lines
d)465 Lines

The no. of edjes in disjoint Hamilton circuit in a complex graph with 17 edges is
a) 8
b) 9
c) 136
d) 17^2

15 persons in a club sit every day ina dinner table such that every member has different
neighbour. This arrangement will last for how many days .
Assume a system has 16MB cache mean Disk Access Time & cache Access time is 76.5
ns & 1.5 overall mean Access time us 465ms for each tripling the memory the miss rate is
halved. The memory required to bring down the mean Access time to 24ns is
a) 16 MB
b) 24 MB
c) 32 MB
d) 48 MB

Average transfer speed of a i/p serial line is minimum 25,000 Bytes & maximum 60000
Bytes. Polling Strategy adopted takes 4microsec(whether there is any i/p byte or not). It is
assured that byte that retrived from controller before next byte arrives are lost. Then the
maximum safe polling interveal is
a) 12
b) 12.33
c) 12.67
d) 32

A harddisk has a rotation speed of 4500RPM. then the latency time is
a) .4
b) .6
c) .7
d) .9

Suppose all elements above the principal diagonal od n x n matix A are zero. If non zero
elements of the lower triangular Matrix is stored in an array B with A[1][1] stored at
B[1]. The addressing formula to the nonzero element in A[i][j]=?
a) A[i][j]
b) i(j-1)/2 +i
c) j(i-1)/2 +i
d) i(i-1)/2 +j

The minumum number of comparisons requied to find the second smallest element in a
1000 element array is
a) 1008
b) 1010
c) 1999
d) 2000

The internal path length of a Bonary Tree with 10nodes is 25. The external path length is
a) 25
b) 35
c) 40
d) 45

Average No. of Comparisons required to sort 3 elements is
a) 2
b) 2.33
c) 2.67
d) 3

In a switch the mean arrival rate of packets is 800 Packets/sec and the the mean service
rate is 925 Packets/sec
a) .008 Sec
b) .08 sec
c) .8 sec
d) 1.1 sec

What is Interface Control Information?
The minumum no. of Multiplications needed to compute x^768 is
a) 9
b) 10
c) 425
d) 767

Find values for a,b,c,d
c 1 1 1
0 a 1 b
1 0 d 0
(967)basex = 321base9

PART II Genreal 50 General Non-Technical[4 Options]
{ >20 questins were from Mathematic}
----------------------------------------
The area of red planet where the Mars Rover Landed?

In Which Day world Telecom Day Celebrated?
Laser is used for what?
a) Treatment of Cancer
b) Treatment of Eyes
c) Treatment of Heart
d) Treatment of Kidney

Which country is not a Member of SAARC
a) Bangladesh
b) Myanmar
c) Maldives
d) Nepal

The New Biotechnology Software intorduced by TCS is?
What is Wi Fi?
Which is the fastest Cruise Missile?

I am preparing for the DRDO STA B paper, can someone give me question paper of the DRDO STA B mechanical Engineering Exam?

[Kiran Chandar]

As per your request, I am giving you DRDO STA B Mechanical engineering paper. have a look.








Here, I am giving you syllabus of the DRDO STA B mechanical Engineering.

Engineering Mechanics: Free body diagrams and equilibrium; trusses and frames; virtual work; kinematics and dynamics of particles and of rigid bodies in plane motion, including impulse and momentum (linear and angular) and energy formulations; impact.

Strength of Materials: Stress and strain, stress-strain relationship and elastic constants, Mohr’s circle for plane stress and plane strain, thin cylinders; shear force and bending moment diagrams; bending and shear stresses; deflection of beams; torsion of circular shafts; Euler’s theory of columns; strain energy methods; thermal stresses.

Theory of Machines: Displacement, velocity and acceleration analysis of plane mechanisms; dynamic analysis of slider-crank mechanism; gear trains; flywheels.

Vibrations: Free and forced vibration of single degree of freedom systems; effect of damping; vibration isolation; resonance, critical speeds of shafts.

Design: Design for static and dynamic loading; failure theories; fatigue strength and the S-N diagram; principles of the design of machine elements such as bolted, riveted and welded joints, shafts, spur gears, rolling and sliding contact bearings, brakes and clutches.

Fluid Mechanics: Fluid properties; fluid statics, manometry, buoyancy; control-volume analysis of mass, momentum and energy; fluid acceleration; differential equations of continuity and momentum; Bernoulli’s equation; viscous flow of incompressible fluids; boundary layer; elementary turbulent flow; flow through pipes, head losses in pipes, bends etc.

Heat-Transfer: Modes of heat transfer; one dimensional heat conduction, resistance concept, electrical analogy, unsteady heat conduction, fins; dimensionless parameters in free and forced convective heat transfer, various correlations for heat transfer in flow over flat plates and through pipes; thermal boundary layer; effect of turbulence; radiative heat transfer, black and grey surfaces, shape factors, network analysis; heat exchanger performance, LMTD and NTU methods.

Thermodynamics: Zeroth, First and Second laws of thermodynamics; thermodynamic system and processes; Carnot cycle. irreversibility and availability; behaviour of ideal and real gases, properties of pure substances, calculation of work and heat in ideal processes; analysis of thermodynamic cycles related to energy conversion.

Applications: Power Engineering: Steam Tables, Rankine, Brayton cycles with regeneration and reheat. I.C. Engines: air-standard Otto, Diesel cycles. Refrigeration and air-conditioning: Vapour refrigeration cycle, heat pumps, gas refrigeration, Reverse Brayton cycle; moist air: psychrometric chart, basic psychrometric processes. Turbomachinery: Pelton-wheel, Francis and Kaplan turbines — impulse and reaction principles, velocity diagrams.

Engineering Materials: Structure and properties of engineering materials, heat treatment, stress-strain diagrams for engineering materials.

Metal Casting: Design of patterns, moulds and cores; solidification and cooling; riser and gating design, design considerations.

Forming: Plastic deformation and yield criteria; fundamentals of hot and cold working processes; load estimation for bulk (forging, rolling, extrusion, drawing) and sheet (shearing, deep drawing, bending) metal forming processes; principles of powder metallurgy.

Joining: Physics of welding, brazing and soldering; adhesive bonding; design considerations in welding.

Machining and Machine Tool Operations: Mechanics of machining, single and multi-point cutting tools, tool geometry and materials, tool life and wear; economics of machining; principles of non-traditional machining processes; principles of work holding, principles of design of jigs and fixtures