If the resultant of two equal forces has the same magnitude as either of the forces then the angle between the two forces is

30°

60°

90°

120°

method of sections in truss analysis is generally found useful to determine

Forces in all members

Forces in selective members

Weights of the members

Bending of members

Maximum range of projectile motion in a plane land is possible for angle of inclination


0°

90°

23.5°

45°

A1embert's principle

provides no special advantage on ewton's law

is not applicable for kinetic problem

is not dependent on inertial effect

converts a kinetic problem into an equivalent static problem

5)If a lid cyEnder and a hollow cylinder of the same mass are allowed to roll down an inclined plane simultaneously then

Hollow cylinder reach the ground first

Solid cylinder reach the ground first

Both reaches the ground at the same rime

Unpredictable


The resultant ofthe two forces P and Qis R. ifQis doubled, the new resultant force is perpendicular to then

Q

R

2R

P 2R

Two objects moving with uniform speeds are 5 m apart, after 1 second when ey move towards each other and are 1 m apart, when they move in same tion. The speeds of the objects are

(1)2m/sec and 2m/sec

3m/sec and 2m/sec

3m/secand 3m/sec

4m/sec and 6m/sec

A ball is dropped vertically downward from the top of a building and another one is thrown horizontally, which will strike ground first?

(I)one dropped vertically

One thrown horizontally

(3)Both will strike simultaneously

It will depend

The linear acceleration of a body of radius with an angular acceleration of a. rad/s2,is


alpha =alpha r

alpha =alpha.r

alpha] alpha

alpha =alpha2r

10) Two forces act at a point. The first force has X and Y Components of3N and -5N respectively. The resultant of these forces falls on the x-axis and has a magnitude of -4N. The X and Y components of the second force is









11) A cantilever bean of length L is subjected to a moment M at a free end. The moment ofinertia ofthe beam Cross section about the neutral axis is 1and the Young modules is E. The Magnitude oftile maximum deflection is


Ml2/2EI

Ml2/EI

4Ml2/EI

4Ml2/EI

12) The elongation ofa Conical bar under its own weight is__that ofprismatic bar of tbe same length

Equal to

Half

One-third

Two-third

13) Tbe beam is said to be of Unifoml strength, if

Bending moment is same througbout the beam


Deflection is same throughout the beam

Bending stress is same throughout the beam

Shear stress is same throughout the beam

14) For a simply supported beanl oflength the bending moment M is described as M 0 X Where a is constant. The shear force will be zero at.

The supports

x=root of L

X

X L

15) The Poisson's ratio for cast iron varies from

0.23 to 0.27

0.25 to 0.33

0.31 to 0.34

0.32 to 0.42

16) Two tapering bars of the same material are subjected to a tensile load P The lengths of both the bars are the same. The larger diameter of each of the bars is
D. The diameter of the bar A at its smaller end is D/2 and that ofthe bar B is D/3. What is theratio ofelongation ofthe barA to thatofbarB.

3:2

2:3

4:9

I:3

17) Plane stress at a point in a body is defined by principal stresses 3cr and cr. The ratio of the normal stress to the maximum shear stresses on the plane the maximum shear stre i









18) The outside diameter of hollow shaft is twice that of its inside diameter. The torque carrying capacity of this shaft is A solid shaft of the same material has the diameter equal to the outside diameter of the hollow shaft. The solid shaft can carry a torque ofM. The ratio ofMt1/Mt2 is

15/16

3/4

1/2



19) the width of a simply supported beam carrying an isolated load at its centre is doubled, the deflection of the beam at the centre is changed by

1/2

1/8





20) When two mutually perpendicular principal stresses are unequal but like, the maximum shear stress is represented by

The diameter of the Mohr's Circle

Half the diameter of the Mohr's Circle

One third the diameter of the Mohr's Circle

One fourth the diameter of the Mohr's Circle

21) The driving and driven shafts connected by a Hooke's joint will have equal speeds, if
Sinalpha=thita

Tane=±root of cos alpha

Tane=alpha

Cot alpha=e

22) A shaft between two bearings is rotating with a disturbing mass 25 kg at a radius of 2 cm. What is the balancing mass to he kept at a radius of 5 cm?

12.5Kg

5Kg

IOKg

25Kg

23) In an epicyclic gear train the number of teeth on Sun and annulus are 80 and 200 respectively. The number ofteeth on planet Gear are


60

30

90

100

24) According to Kennedy's theorem, if three bodies are moving relative to each other, their relative instantaneous centres will lie on


Straight line

Ellipse

Parabola

Circle

25) When the crank is at the inner dead center, in a horizontal reciprocating engine, then the velocity of the piston will be


Zero

Maximum

Minimum

Infinity

26) The ratio ofthe height ofa porter governer (when the length ofarms and links are equal) to the height of a Watt's govemer is m Mass ofthe ball, and M Mass of the load on the sleeve
m M m+M m+M









27) Minimurri numberofteethofstandardproportion withinvolute profile and 20° pressure angle spur gear is

12

18

32

20

28) The engine of an aeroplane rotates in clockwise direction when seen from the tail end and the aeroplane takes a tum to the left. The effect ofthe gyroscopic couple on the aeroplane will be

To raise the nose and dip the tail

To dip the nose and raise the tail

To raise the nose and tail

To dip me no e and tail

29) The Conolis component of acceleration

Lags the sliding Velocity by 90

Leads the sliding Velocity by 90

Lags the sliding Velocity by 180

Leads the sliding Velocity by 180

30) The number oflnstantaneous Centers in a 6 link mechanism are



15

10



31) The space Centrode of a Circular disc on a straight line path is

A Circle

Aparabola

A Straight line

Ahyperbola

32) The Cam follower extensively used in air craft engine is

Knife edge follower

Flat faced follower

Spherical faced followed

Roller follower


33) The Minimum number of teeth in a rack and pinion for a 20° pressure angle teeth is

20

18

22

24

34) A shaft carrying three rotors will have

No node

One node

Two nodes

Threenodes

35) In vibration isolation system, if then the phase difference between the
transmitted force and the di turbmg force is


0°

90°

180°

270°

36) The door closers operated nonnally at

Over damping

Under damping

Critical damping

No damping


37) In a spring-mass system, if the mass is halved and the spring stiffness is doubled, the natural frequency is

Halved

Doubled

Unchanged

Quadrupled

38) In a spring mass system, 4 kg mass is uspended through a spring of stiffness 100 N/m. What is the circular frequency of the system?

rad/s

rad/s

rad/s

rad/s

39)6The degrees offreedom of a simple pendulum is given by

2



0

1

40) Natural frequency oftransverse vibrations ofa shaft carrying load at the centre of the span is


" t5
- 4.987 H

18


HZ -Z
" t5

41) Which ofthe following is Trapezoidal thread


ACME

Square

Buttress

Metric
42) A car moving with uniform acceleration covers 450 m in a 5 seconds interval, and covers 700 m in the next 5 seconds interval. The acceleration of the car is
50 25 10
43) Two parallel and coplanar shafts are connected by

Spur gears Bevel gears



Spiral gears Double helical gears


44) Theefficiency ofselflockingscrew jackisalways

Less than 50% Greater than 50%



Equal to 50% Always 100%


45) The fatigue life ofa part can be improved by

Electro plating Polishing



Shot peening Heattreatment


46) The following is an antifriction bearing

Journal bearing Sleeve bearing



Foot step bearing Ball and roller bearing


10

505/A 47) As per the uniform wear theory. brakes and clutches friction radius is equal to
R+r R2 r2 R2 +r2
R+r
2 2 2Rr
48) Starting friction is low in

Hydro Static lubrication Hydro dynamic lubrication



Mixed or semi fluid lubrication Boundary lubrication


49) According to IBR, safety factor of rivet should be less than
3
50) In case of single welded butt joint the thickness ofplate must be

10-12mm 1-6mm



8-10 rnm 12-15 rnm


51) A fluid is a substance that


Always expands until it fills any container



Is practically incompressible



Cannot remain at rest under action of any shear force



Cannot be subjected to shear force


52) Pascals law states that pressure at a point is equal in all directions in a

Liquid at rest Fluid at rest



Laminar flow Turbulent flow


53) Specify which ofthe following must be fulfilled by the flow of any fluid, real or ideal, laminar or turbulent


Newton's law of Viscosity



Velocity at boundary must be zero relatively to boundary



The continuity equation



Velocity normal to a solid boundary is zero


11 [P.T.a.



505/A


54) The flow offluid through a pipe is laminar when

The fluid is ideal



The fluid is Viscous



The Reynolds number is less than 2000



There is considerable lateral dispersion


55) For Viscous flow through pipes the friction factor is gi en as
1600/Re 1000/Re 16/Re 32/Re
56) Reynolds number may be defined as the ratio of

Viscous forces to internal forces



Elastic forces to pressure forces



Internal forces to Viscous forces



Gravity forces to intertial forces


57) The loss ofhead (or energy) due to velocity ofliquid aI the outlet ofthe pipe is given as
V4 4g V4 /2g V2 /4g 2g
58) In turbulent flow the friction factor for smooth pipe depends upon

The Reynolds number and the relative roughne



The relative roughness only



The size of the pipe and the discharge only



The Reynolds number only


59) The concept of boundary layer is introduced by


Prandtl

Reynold

Euler

Nusselt
60) In the equation for capillary rise or fall ofa liquid h 4 17 case fwd, the value of e for water is
0° 10°


180°
12
505/A

61) The product of Reynolds number and Prandtl number gives

Pecletnumber Grasshof number



Nusselt number Mach number


62) The effectiveness ofa heat exchanger is tlle ratio of two heat transfer which is defined as tile ratio of


Ideal to actual Ideal to maximum



Actual to Maximum Maximum to actual


63) The roof of a house ha been given a coating of shining metal paint. Consequently tile temperature inside the room will


Rise No effect



Cannot be decided Fall


64) Which of tile following does not pertain to transient heat conduction

Biot number Fourier number



Heisler chart Interchange factor


65) In free convection heat transfer, transition from laminar to turbulent flow is governed by

Reynolds number



Grashof number



Reynolds number and Grashof number



Grashofnumber and Prandtl number


66) Absorptivity of a body is equal to its emissivity


For a polished body



Under tllennal equilibrium condition



At one particular temperature



At shorter wave lengths


13 [P.T.a.
505/A


67) The log mean temperature difference is given hy

(01 Log,COI 1°2







Log,COI

68) In a counter flow heat exchanger, cold fluid enters at 30° C and leaves at 50° C where as the hot fluid enters at 150° C and leaves at 130° C. The mean temperature difference is


100°C


69) Forced convection in a hquid bath is caused by

Density difference brought about by temperature gradients



Molecular energy interaction



Flow of electrons in a random fashion



Intense stirring by an external agency


70) The value of an extensive property is essentially dependent on

Mass or extent of the system



Interaction of system with its surroundings



Path followed by the system is going from one state to another



Nature ofboundaries, rigid or flexible


71) The process of converting ice directly to steam is called

Equalent evaporation Sublimation



condensation Critical evaporation


72) The gas with highest value ofadiabatic index is
Helium Nitrogen Oxygen Methane
73) The gas at pressure p in the vessel is compre ed suddenly to half of its original volume. Then pressure of the gas after a long time becomes

1/2P 2p



Less than 2p Greater than 2p


14
505/A

74) The entTOpy of universe tends to


Becomes zero



Remains constant



Maximum



Attain a certain finite minimum value


75) Which air standard cycle consists of two isothermals connected by two constant volume proce se

Brayton cycle Ericsson cycle



Stirling cycle Atkainson cycle


76) Stainless steel contains following elements

Cr, Fe, Sn, Ni Cr, Sn, Cu, Ni



Cr, Ni, Fe, C Fe, Pb, Sn, C


77) The binding material for cemented carbide is
Iron Chromium Nickel Cobalt
78) Fastest method at case hardening a samples is

Carburizing Nitriding



Induction hardening Cyaniding


79) Austempering produces

Hard surface and tough core



Hard core and tough surface



Hard surface and hard core



Tough surface and tough core


80) In cold working material gets stronger due to


Wear mechanism Slip system



Twin mechanism Dislocation multiplication


81) How many necks appears during tensile test ofspecimen prepared according to ASTM standard

One Two



Three Unpredictable


15 IP.T.O.
505/A


82) Gibbs phase rule for binary phase diagram is








83) Chip flow over rake face is

Sliding model Sticking model



Sliding and sticking model Sticking and sliding model


84) Discontinuous chips during machining forms when

Work is brittle, speed isJow Work is brittle, speed is high



Work is ductile, speed is low Work is ducWe, speed is high


85) In grinding wheel, when the bonding agent is strong, so upon grinding hard materials, slowly all the abrasives wear out and grinding wheel is rubbing over work without cutting. This phenomenon is called
Glazing Loading Dressing Truing
86) For unconventional machining processes, following is the decreasing order at tool wear.

USM>EDM>ECM USM>ECM>EDM



ECM EDM USM ECM> USM EDM


87) The accuracy of machining in Abrasive jet machining with increase in stand off distance

Increases Decreases



Increases then decreases Decreases then increases


88) Larger clearance angles are used in drills to machine ductile materials because
duct(I) ile materials have tendency for Elastic recovery Tough Larger elongation Malleable
89) Fast(I) est method of produciShaping ng gears Rolling is Robbing Extrusion
16

SOS/A 90) In principle of jig design, 3 hemispherical pins are provided in base. lndentify the wrong statement in this regard


It ensures machining in one plane



It arrests 5 degrees at freedom



It positions the tool



For heavier work pieces we use 3 hemispherical plugs.


91) In which of the welding techrnque, the weld pool is protected by inert gas?


SMAW

TIG welding

SAW

Resistance weeding
92) In arc welding process the current value is decided by


Thickness at plate Length at weld portion



Voltage across arc Speed at travel


93) The problem of arc blow will be very serious in


DC electrode positive DC electrode negative



DC bare electrode AC


94) Maximum reduction can be given to any material in tube drawing using


Tube sinking Drawing with floating mandrel



Drawing with fixed mandrel Drawing with moving mandrel


95) The process in which during forging material moves towards centre


Edging Fullering



Hubbing Open die forging


96) In wire drawing operation the bright shining surface on wire is obtained if


Not using a lubricant Using thin film lubricant



Using solid lubricant Good surface finish dies



Mandrel Tool Post Arbor Fixture


97) Which of the following is used to hold cutter in milling machine?
17 [P.T.O.
505/A

98) Core in the centrifugal casting is made of


Carbon steel Core sand



Wax 0 core is used


99) Aholeat1mm is to be drilled in glass. It could best be done by


Laser drilling Plasma arc drilling



USM EDM process


100)In limits and fits system shaft basis system is one whose


Lower deviation is zero Upper deviation is zero



Minimum clearance is zero Maximum clearance is zero


101)According to Taylor's principle" No Go" gauge checks


Only one feature at a time Only important dimensions at a time



All the dimensions at a time Only related dimensions at a time


102)Tolerance of hole are shown in figure. Maximum size of Go gauge according to workshop design


us

I."



. 30.02 30.023

30.017 30.053
I 03)Rapid plane in NC machine programming is

Imaginary plane just above the work piece



Imaginary plane just below the work piece



Plane on which work is kept



Plane at tool change


18
SOS/A

104)Power consumption in metal cutting is mainly due to

Tangential component at force Longitudinal component at force



Normal component at force Friction at tool chip interface


105)Rake angle in twist drill varies from the centre ofthe drill towards periphery according to
Increases and then decreases Decreased and then increases

Increases continuously Decreases continuously
106)Ll is expressed as (in APT)




Ll=LINEILFT TANTO CI, RGT TANTO C2



Ll=LINEIRGT TANTOCI, LFT TANTO C2



Ll=LINEILFT TANTOC1, LFT TANTO C2



Ll=LINEIRGT TANTOCI, RGT TANTO C2


107)Diamond pin location is used in fixture because

It does not wear out



Adjust centre to centre distance between 2 holes



Easy to clamp



Easy to manufacture


l08)Extrusion force does not depend upon
Extrusion ratio Type of extrusion process

Material of die Working temperature

109) Steel balls are manufactured by
Casting Machining Cold heading Sintering 19 [PoToao
505/A

110) Pinch effect in welding is result of
Expansion at gases in arc Electromagnetic forces

Electric forces Surface tension at molten metal
111) Project completion time in PERT follows


Beta distribution ormal distribution



Poisson distribution Binomial distribution


112) Inventory control in production planning and control aims at


Achieving optimization



Ensuring against market fluctuations



Acceptable customer service at low capital inve ODem in inventory



Discounts allowed in bulk purchase


113) Which of the following is independent sales forecase'l

Productivity Inven 1)-control



Production Planning Produ tion control


114) In CNC milling axis represents

Tool axis Vork axis



Table axis Both work and tool axis


115) In PERT critical activity has

Maximum flqat Zero float



Minimum float Minimum cost


116) In linear progranuning problem ifthe new constraint is added, what will change?


Feasibility Optimality



Both feasibility and optimality 0 change


0.5 0.66 0.84 0.95


117)A network has 3 activities on critical path with mean time as 8 and 6 and . variance as 1,4 and 9. The probability at finishing the project in 17 days is
20

505/A 118)Ifthe demand for an item is doubled and the ordering cost halved, the economic order quantity


Remains unchanged Increased by .fi



is doubled is halved


119) Simplex problem is considered as unbounded when

All the variables in entering column are negative



Variables in basis are negative



All the values in row are negative



Artificial variable is in the basis


120)A bank queue is having 3 counters with 30 system capacity cater to the whole campus. If arrival rate is 10/hr and service rate is 12/hr on FCFS basis the system can be represented as:


M1M130: FCFS/3/ 00 M1M13: FCFS/ oo /30



M1M13: FCFS/30/ 00 M1M13: FCFS/IO/12


121)Tolerances are provided because

Machines are not accurate



Machine environment follows a normal distribution



Quality ofFit will come only when there is range



Ease ofmanufacturing


122)Earthquakes produces the follOving type ofvibrations

Torsional Transverse



Seismic Longitudinal


123)ln PERT activity time is considered as Beta distribution because
It is unimodel It cuts 2 intercepts on x-axis

Both I and 2 are correct It is continuous distribution
21 [P.T.D.

505/A
124)The thennal efficiency of an ideal Rankine cycle is less than that of Carnot cycle operating between the same maximum and minimum temperature limits because

Heat addition does not takes place at constant temperature



The expansion process is not reversible and adiabatic



Heat rejections does not take place at constant temperature



The compression process is not reversible and adiabatic



125)In stearn power plant, what is the outcome ofregenerative feed heating
Increase in specific output
Increase in cycle efficiency
. Improved quality of exhaust steam
Reduced condenser load Select the cor rect answer
and only only

and

126)In the case of a Diesel cycle, increasing cuttoffratio will increase


Efficiency Mean effective pressure



The Maximum pressure The engine weight



127)The COP ofa domestic refrigerator as compared to that ofan air conditioner is in general

High Low



Same COP depends on dry bulb temperature



128)Assertion :Heat pump used for heating is a definite advancement over the simple electric heater. Reasons The heat pump is far more economical in operation than electric heater.


Both A R are correct and R is correct explanation ofA.



Both A R are correct and R is not correct explanation ofA



A is true R is false



A is false R is true


22

505/A


129)A pelton wheel is ideally suited for

High head and low discharge High head and high discharge



Low head and Low discharge Mediwnhead and medium discharge


130)Match List and List -II List List -II
A. Pelton wheel I) Medium discharge, low head
B. Francis turbine 2) High discharge, low head
C. Kaplan turbine Medium discharge, medium head
Low discharge, high head

C-3 C-4

C-3 C-2
131)In reaction turbines, the draft tube is used

For the safety of turbine



To Convert the kinetic energy of flow by a gradual expansion



To destroy undesirable eddies



To reduce viscosity of fluid


132)Which one ofthe following iscorrect? In a gas turbine cycle with regeneration

Pressure ratio increases Work output decreases



Thermal efficiency increases Head input increases


133)Agas turbine workingonBrayton cycle produces 4000 kw ofnetpower. Ifits work ratio is what is the power consumed by the compressor?


2000 KW 4000 KW



6000 KW 8000 KW


23 [P.T.D.


SOS/A 134) Which one of the following pairs represents the specific speeds of turbine and pump respectively?
NQ'12 NpU2 NQ"2 NpU2


H ll4
H H
NpU2 NQ,n NpU2 NQ"2


H3J4 and H H 5/4 and H 314
135) Adiabatic saturation process for moist air involves

Cooling and humidification Cooling and dehumidification



Change in WET Constant relative humidity


136) Ifthe specific healS ofdry air and water vapour are IkJ/kgk and 1.88 kJ/kg-k and the humidity ratio is 0.011, the specific heat of moist air will be

1.0207 kJ/kgk 1.869 kJ/kgk



1.891 kJ/kgk 0.9793 kJ/kgk


137)For air with a relative humidity of80%


The DBT is less than the WET The OPT is less than WET



The OPT and WET are equal DBT and DPT are equal


138)


An air standard Otto cycle has the following shape on a thermodynamic plane. The X and Y coordinates respectively are
VandP VandS VandT SandP
139)Which gas power cycle consists of 4 processes during which work alone is transferred during two processes and heat alone is transferred during the other two processes?


Atkinson cycle Carnot cycle



Diesel cycle Otto cycle


24
505/A

140)Theboreandstroke ofthecylinder ofa6cyLinderengineworki.ngonan otto cycle are 20 em and 30 cm respectively. The total clearance volume is 30001t cm3. What is the compression ratio?
5
141)TheefficiencyofsuperheatRankinecycle ishigherthanthat ofsimpleRankine cycle because


The enthalpy of steam is lower for superheat cycle



The mean temperature of heat addition is higher for superheat cycle



The temperature of steam in the condenser is high



The quality of steam in the condenser is low


142) Collapsibility of green sand mold can be increased by adding


Water Clay



Wood flour Synthetic resin


143)In a gravity feed system in casting, the cross section area ofhorizontal runner

Remains sanle Keeps on increasing



Keeps on decreasing Depends upon material


144)Circular billet forging is a case of
Plane stress Plane strain

Unidirectional stress Unidirectional strain
L45) Work hardeni.ng exponent of any material can be calculated by calculating

Maximum true stress Maximum true strain

Maxllnllffi engineering stress Maximum engineering strain
2S [P.T.a.

505/A 146) Identify the wrong statement. Ifsidecuttingedgeangle ofasingle pointcutting tool increases

Tool life increases Chips becomes thinner



Chips becomes wider Temperature over rake face increases


147) Identify the wrong statement related to back rake angle in single point cutting tool. Increase in back make angle

Lip angle increases



Tool life initially increases



Contact length on rake face will decrease



Cutting forces will be relatively low


148)Increase in semi die angle in metal forming, the die life

Increases



Decreases



Initially increases then decreases



Initially decreases then increases


149)Dead metal zenes form in extrusion process because

Higher extrusion pressure



Slip lines do not appear in certain regions



Lack ofsmooth flow of material



Improper lubrication


1SO)Maximum reduction can be given to any material in what kind ofrolling mill?

Planetary mill Sendzmier mill

3highmill 4highmill
•••


26