Answer / senthil

MAHINDRA
Newton’s Law-Motion
Boy
1. In a drawer, 5 white socks and 8 black socks are there.
To draw one pair of socks, minimum no of socks that has to
be drawn? Ans.3
2. Radius of a cylinder is increased by 30%,then increase in
volume will be -------(height is constant).Ans.69%
le’s Law-Pressure and volume relation
Joule’s Law-Mech. Equivalent of heat
Kirchoff’s Law-Electric circuit
Hooke’s Law-Elasticity
Air velocity-Anemometer
Stagnation pressure-pitot tube
Rpm-Stroboscope
Humidity-Hygrometer
Furnace temp-pyrometer
If a body is at -10 degree C(ice) and if it is to be
converted into saturated vapour ,how much heat is necessary?

To study:
1. Strength of materials-Bending Moment Diagram,Cantilever
beam (Basics)
2. Relative density
3. Natural frequency-spring mass system
4. Heat treatment-very basics
5. Pump efficiency
1. sinhө - hyperbolic
2. Xn+1 = Xn – f ‘ (Xn) / f (Xn) - - - Newtons
Raphson formula
3. 3d3y/dx3 + 7d2y/dx2 - 4 (dy/dx)2 = 4 y2 order
, degree

4. According to Newtonian Law, shear stress is directly
proportional to velocity gradient.
5. in casting molten metal flows through _______. (runner)
6. welding -> preheating -> why
7. which one C% is high
a. 28Cr50
b. 40Cr
c. C35
8.

F



Stress type?
8. What is the type of failure in Key that is used in
Flange Coupling
9. Spring is not subjected to
a. Hoop stress
b. Deflection]
c. Torsional shear
d. Transeverse shear>>Ans
10. Global Warming CO2
11. Principal Stress = 1000 , -600. What is maximum shear
stress
12. Order of efficiency….. 2 Stroke SI,,,,, 4 Stroke CI
13. if Inlet air temp increases, efficiency(petrol engine)
increases but compressor efficiency decreases - - - True
14. In SI knocking is reduced due to increase of
a. Increasing of wall temp
b. Compression ratio
c. Supercharge
d. Engine speed
Specific energy is high?
e. Turning b. drilling c. grinding d. planning
15. Match the following
a. Mohrs circle - Principle stress
b. Martensite - Hard and brittle Phase
c. Degree of freedom - kinetics
d. Section modulus - flexural rigidity
e. Plastic water bottle - blow moulding
16. which cycle uses two isentropic and two isothermal
processes
17. dynamic loading which consideration
a. Elastic limit
b. Poisson ratio
c. Yield strength
d. Endurance limit
18. A material is loaded still yield point and the load is
removed.
a. Increase in yield stress
b. Decrease in yield stress
c. Unchanged yield stress
d. Reaches UTS
19. A thin wire is subjected to tensile load. Temperature
is same. The resistance_______ (remains constant)
20. Aeroplane is flying at 800 kmph. Air temp. is zero.
a. Subsonic
b. Supersonic
c. Sonic
21. match
a. kirchoff law - electrical circuit
b. Daltons law - partial pressure
c. Hooks law - elasticity
d. Joules law - work equivalent to heat

questions of M&M

EXAM CONSISTS OF THREE PARTS
1.TECHANICAL PAPER WRITTEN TEST 2.GROUP DISCUSSION
3.TECHNICLA =
INTERVIEW
HERE NO BODY IS SELECTED FROM MECHANICAL BACKGROUND
WRITTEN TEST CONSISTS OF 50 QUESTIONS..
ALL ARE OF OBJECTIVE TYPE

1.A BALL IS DROPPED FROM A HEIGHT OF 1 METER ON TO THE
GROUND...EVERY =
TIME IT HITS THE GROUND AND REBOUNDS WITH HALF THE VELOCITY
BEFORE =
IMPACT ..WHAT IS THE TOTAL HEIGHT THAT THE BALL TRAVELS...
ANS:2 METERS
IT IS AN INFINITE SERIES...
1+(2/4)+(2/8)+(2/16)+........SO ON
2.FOR A FIXED COMPRESSION RATIO WHICH CYCLE IS MORE EFFICIENT
ANS:NONE OF THESE
HE HASN'T GIVEN THAT OTTO CYCLE IS MORE EFFICIENT THAN
DIESEL CYCLE..
3.IF A SPRING OF STIFFNESS K IS CUT INTO TWO PIECES WHAT IS
THE =STIFFNESS OF EACH PIECE...
ANS:DOUBLED
4.WHICH GEAR HAS NO SELF INTERLOCKING
A)INVLUTE B)STUB C)CYCLOIDAL D)EPICYCOID
5.H7-S6 which type of fit
a)force fit b)running fit c)push fit=20
6.centigrade scale reads half the value of faurenhear .what
is the temp =
in centigradea)40 b)60 c)80 d)160
ans:160
7.power required by drilling can be reduced by increase in=20
a)rake angle b)cutting angle
8.a large blow is to be given to a suspend system so that
there is no =
reaction at the support ,where the is to be applied
a)metacentre b)centre of gravity c)centre of spin
9.machinability can be increased by
a)annealing b)normalising c)spheroidising
10.A DIESEL ENGINE IS PRODUCING 45 KW POWER AND IF IT IS NOT
CONNECTED =
TO ANY ELECTRICAL LOAD THEN THE POWER PRODUCTION OF DIESEL
ENGINE IS
A)45 B)0 C)
11.TWO VESSELS OF 5L,3L CAPACITY HAVE GAS PRESSURES OF 3ATM
AND 5ATM =
RESPECTIVELY,IF BOTH ARE CONNECTED BY A SMALL PIPE ,AND IF THE =
TEMPERATURE IS CONSTANT,THEN WHAT IS THE RESULTANT PRESSURE
A)3.75 B)4 C)5 D)8
ANS:3.75ATM
12.A SYSTEM HAS A TIME PERIOD OF 2SEC WHEN IT'S MASS IS
INCREASED BY =
1KG IT TIME PERIOS INCREASES BY 1SEC.WHAT IS THE MASS OF THE
SYSTEM
ANS:1.6KG
13.AT THE NEUTRAL AXIS OF THE BEAM
ANS:SHEARSTRESS IS MAXIMUM AND BENDING STRESS IS ZERO.
14.FUEL INJECTION PRESSURE IN DIESEL ENGINE IS OF THE ORDER OF
A)40 B)100 C)200 D)500 kgf/cm2
15.NO.OF INSTANTANEOUS CENTRES IF NO.OF LINKS IS 8
ANS:28
16.THE REQUIREMENT OF OXYGEN IS HOWMUCH WHEN 1 gm OF CARBON IS =
BURNT(AIR CONTAINS 23% OF OXYGEN BY WEIGHT)
17.STEEL IS SUBCOOLED TO 0 DEGREES OF CENTIGRADE=20
A)TO AVOID RECONVERSION OF MARTINSITE
18.RATIO OF MODULUS OF RIGIDITY TO BULK MODULUS
19.ADVANCING THE SPARK ,EFFECT ON KNOCK(IN S.I ENGINE)
20.EFFICIENCY OF DIESEL ENGINE IS INCREASED BY
A)SUPER CHARGING B)INFECTION PRESSURE
21.IN TOOL DESIGN
ANS:VT power n=3Dconst
22.ratio of torque of hollow shaft to solid shaft
the outer dia of both is same,the inner dia of hollow shaft
is half the =
outer dia
ans:15/16
23.in the fourier series,odd function contains
a)sine terms b)cosine terms c)none of these
24.if earth stops its rotation about an axis at 45degrees =
lattitude,what will be gvalue(radius of earth 6.87*10 pow(6))
a)6.87 b)9.81 c)68.7
25.father of work study(i havn't remembered last term work
studry of =
not)
a)f.w.taylor b)tensung
26.probablity:in one bag 3w,2b balls another bag 5w ,3b
probability of =
getting a white ball.
27.what type of gear will produce less noise
a)spur b)helical c)epicycloid d)bevel
28.motor cycle what type of chain is used
a)roller chain b)double roller c)bush type
29.which type of bearing efficient for radial loads
a)roller type b)cylindrical c)tapered cylindrical
30.if a ball of 2kg ,when come from a certain height and
falls on a =
spring of k(some value)what will be the deflection of the spring
31.NOx is a function of=20
a)combustion b)
32.lamount boiler is
a)force circulation b)natural circulation c)water tube

Answer / gil b mullero

yes

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