Ssc jen 2008 mechanical objective paper

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@ ! dkWij ds (b) ,syqfefu;e ds
(c) xzsQkbV ds (d) ,-lh-,l-vkj- pkyd ds
2. fdl izdkj ds osYMu esa fi?kyh gqbZ /kkrq ds dqaM dk
iz;ksx fd;k tkrk gSa
(a) oS|qr /kkrqey (b) fuefTtr vkdZ
(c) ,e-vkbZ-th- (d) Vh-vkbZ-th-
3. lknk vkSj VDdj ;k ewB osYMks dk iz;ksx yxHkx fdruh
eksVkbZ rd ds nzO;ksa ij fd;k tk ldrk gS
(a) 25 mm (b) 40 mm (c) 50 mm (d) 70 mm
4. vkdZ osYMu esa, bysDVªksM vkSj dk;Z ds chp vkdZ cukbZ
tkrh gS
(a) /kkjk ds izokg }kjk (b) oksYVrk }kjk
(c) nzO; dh eksVkbZ }kjk (d) laidZ izfrjks/k }kjk
5. bysDVªksM ds foysiu ds fy, iz;qDr lkexzh dks dgrs gSa
(a) j{kh ijr (b) ca/kd
(c) /kkrqey (d) xkyd
6. fuEufyf[ky esa ls osYMu dh dkSulh izfØ;k v{k;h
bySDVªksMks dk iz;ksx djrh gS
(a) ystj osYMu (b) ,e-vkbZ-th- osYMu
(c) Vh-vkbZ-th- osYMu (d) vk;u che osYMu
7. jsr lapjd esa] lkWapk isVh ds lcls uhps okys Hkkx dks
dgrs gS
(a) 'khkkZ/kZ ;k dksi (b) phd
(c) Mx (d) lkWapk isVh ry
8. ckyw dh iSVuZ Qyd ij uje vkSj lkWaps ds fiNyh vkSj
dBksj dqVkbZ ;k jSafeax djus ds fy, dkSuls lapdu
;a= dk iz;ksx fd;k tkrk gS
(a) fodaid ;a= (b) ckyw iz{ksid
(c) fuihMu ;a= ;k LDohftax
(d) foyxd ifV~Vdk
9. lkjs lkWaps esa ckyw dh ,dleku dBksjrk izkIr djus ds
fy, fuEufyf[kr esa ls dkSuls lapdu ;a= dk iz;ksx
fd;k tkrk gS
(a) Mk;Ýke lapdu (b) lapdu ifV~Vdk
(c) ckyw iz{ksid (d) fuihMu ;a=
10. dks'k lapdu dk eq[; ykHk ;g gSa fd
(a) /kkfRod iSVuZ dk iz;ksx fd;k tkrk gS
(b) lkWaps etcwr gksrs gS
(c) iryh dkWVsa ljyrk ls fey ldrh gS
(d) mPp mRiknu nj laHko gS
1. For Arc heating electrode is mode by–
(a) Copper (b) Aluminium
(c) Graphite (d) A. C. S. R conductor
2. In which type of welding a pool of molten metal is
used
(a) Electric slog (b) SubmergedArc welding
(c) M. I. G (d) T. I. G.
3. What is the max size of plate thickness for a simple
or couison welding–
(a) 25mm (b) 40mm (c) 50mm (d) 70mm
4. InArc welding the electric arc is produced between
the work and electrode by.
(a) Flow of current (b) by Voltage
(c) Thickness of fluid (d) Contact resistance
S The material used for the electrode is called
(a) Protective layer (b) Binder
(c) Slag (d) Flux
6. Which of the following welding processes uses non-
consumable electrodes?
(a) Laser welding (b) MIG welding
(c) TIG welding (d) Ion beam welding
7. In sand moulding, the bottommost part of the flask
is called :
(a) Cope (b) Cheek
(c) Drag (d) Flask bottom
8. In order to ram the sand softer on the pattern face
and harder at the back of the mould, which of the
following types of moulding machines is used?
(a) Jolt (b) Sand slinger
(c) Squeezing (d) Stripper plate
9. Uniform sand hardness is obtained throughout the
mould by which of the following moulding
machines?
(a) Diaphragm moulding
(b) Stripper plate (c) Sand slinger
(d) Squeezing
10. The main advantage of shell moulding is that
(a) A metallic pattern is used
(b) The moulds are stronger
(c) Thin sections can be easily obtained
(d) High production rate is possible
SSC J.En. 2008

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$1. Reaming is the operation of:
(a) Enlarging the end of a hole cylindrically
(b) Cone shaped enlargement of the end of a hole
(c) Smoothing and squaring the surface around a
hole
(d) Sizing and finishing a hole
12. Zeroth law of thermodynamics defines
(a) Internal energy (b) Enthalpy
(c) Temperature (d) Pressure
13. Ideal gas equation is–
(V = specific volume, m = mass of gas)
(a) pV = RT (b) pV = mRT
(c) pVn
= C (d) pVy
= C
14. Dryness fraction of steam is defined as
(a) Mass of dry steam / mass of water vapour in
suspension
(b) Mass of water vapour in suspension / Mass of
dry steam
(c) Mass of dry steam / Mass of sry steam + mass
of water vapour in suspension
(d) Mass of water vapour in suspension / Mass of
dry steam + Mass of dry steam
15. Lancashire Boiler is a
(a) Water tube boiler (b) Fire tube boiler
(c) Locomotive boiler (d) High pressure boiler
16. Range of compression ratio for diesel engine
(a) 8 to 10 (b) 16 to 20
(c) 10 to 15 (d) None of these
17. The two stroke cycle engine has
(a) One suction valve and one exhaust valve
operated by one cam
(b) One suction valve and one exhaust valve
operated by two cams
(c) Only ports covered and uncovered by piston to
effect charging and exhausting
(d) None of the above
18. Morse test is used for multi-cylinder spark ignition
engine to determine
(a) Thermal efficiency (b) Mechanical efficiency
(c) Volumetric efficiency
(d) Relative efficiency
19. For diesel engine, the method of governing
employed is
(a) Quality governing (b) Quantity governing
(c) Hit and miss governing
(d) None of the above
11. ifjos/ku ,d izfØ;k gS
(a) fdlh fNnz ds fljs dks csyukdkj ckus dh
(b) fdlh fNnz ds fljs dks 'kadq ds vkdkj esa ckus dh
(c) fNnz ds fxnZ i`B dks el`.k vkSj vk;rkdkj djus dh
(d) fdlh fNnz dk vkekiu vkSj ifjdj.k djus dh
12. mekxfrdh dk 'kwU; fu;e ifjHkkfkr djrk gS
(a) vkarfjd mtkZ dks (b) ,UFkSYih dks
(c) rkieku dks (d) nkc dks
13. xSl dk vfHky{kf.kd lehdj.k feyrk gS
(V = fof'kV vk;ru, m = xSl dk nzO;eku)
(a) pV = RT (b) pV = mRT
(c) pVn
= C (d) pVy
= C
14. Hkki dk 'kqdrka'k fdl izdkj ifjHkkfkr fd;k tkrk gS
(a) 'kqd Hkki dk nzO;eku / fuyacu esa ty oki dk
nzO;eku
(b) fuyacu esa ty oki dk nzO;eku / 'kqd Hkki dk
nzO;eku
(c) 'kqd Hkki dk nzO;eku / 'kqd Hkki dk nzO;eku +
fuyacu esa ty oki dk nzO;eku
(d) fuyacu esa ty oki dk nzO;eku / fuyacu esa ty
oki dk nzO;eku + 'kqd Hkki dk nzO;eku
15. yadk'kk;j ckW;yj gS
(a) ty ufydk ckW;yj (b) vfXu ufydk ckW;yj
(c) jsy batu ckW;yj (d) mPp nkc ckW;yj
16. Mhty batu ds fy, laihMu vuqikr dk ifjlj gks
ldrk gS
(a) 8 to 10 (b) 16 to 20
(c) 10 to 15 (d) buesa ls dksbZ Hkh ugha
17. nks LVªksd pØ batu esa gksrs gSa
(a) ,d pwk.k okYo vkSj ,d jspu okYo tks ,d dSe
}kjk pyk, tkrs gS
(b) ,d pwk.k okYo vkSj ,d jspu okYo tks nks dSe
}kjk pyk, tkrs gS
(c) dsoy }kj tks vkos'ku rFkk jspu ds fy, fiLVu
}kjk vko`r vkSj vuko`r fd, tkrs gS
(d) mi;qZDr esa ls dksbZ ugha
18. ekslZ ijh{k.k dk iz;ksx cgqcsyu LQqfyZax izYoyu batu
ij D;k Kkr djus ds fy, fd;k tkrk gS
(a) rkih; n{krk (b) ;kaf=d n{krk
(c) vk;rfud n{krk (d) vkisf{kd n{krk
19. Mhty batu ds fy, iz;qDr vf/kfu;a=.k dh fof/k gS
(a) xq.krk vf/kfu;a=.k (b) ek=k vf/kfu;a=.k
(c) ?kkrpwd vf/kfu;a=.k
(d) mi;qZDr esa ls dksbZ Hkh ugha

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P' Francis turbine is a
(a) Axial flow turbine (b) Radial flow turbine
(c) Impulse turbine (d) Outward flow turbine
21. In laminar, incompressible flow in a circular pipe,
the ratio between average velocity and maximum
velocity would be
(a) –1/2 (b) 1/3 (c) 2/3 (d) 1/2
22. A per law of fluid motion for steady stream flow,
the frictional resistance
(a) Varies proportionally to pressure
(b) Varies in inverse proportion to pressure
(c) Does not depend on pressure
(d) First increases then decreases
23. Which one of the following assumptions
Bermoulli’s theorem is not correct?
(a) Flow should not be unsteady
(b) Flow should be continuous
(c) The fluid should be compressible
(d) Flow should be frictionless
24. What will be the maximum hydraulic efficiency in
case of direct impact of jet on a series of the flaw
vanes mounted on the periphery of a large wheel?
(a) 33% (b) 50%
(c) 66% (d) Cannot be a fixed value
25. Constant efficiency curve of turbine is drawn
between (on both oxes)
(a) Power speed (b) Efficiency speed
(c) Efficiency Power
(d) Efficiency Head
26. Specific speed of a centrifugal pump is defined as
the speed at which the pump would deliver
(a) 1 HP (b) 1 kW
(c) 1 m3
/sec (d) 1000 kg/sec
27. The crippling load for both ends fixed long column
is given by
(a)
2
2
ELπ
l
(b)
(
2
EL
4
π
l
(c)
2
2
4 ELπ
l
(d)
2
2
2 ELπ
l
28. Rankine theory is valid for
(a) Long column (b) Short column
(c) Both (d) None of the above
29. Poisson’s ratio is used in
(a) One dimensional body
(b) Two dimensional body
(c) Three dimensional body
(d) Both two three dimensional body
20. ÝSaflal Vjckbu gS
(a) v{kh; izokg Vjckbu (b) f=T; izokg Vjckbu
(c) vkosx Vjckbu (d) cfg%izokg Vjckbu
21. fdlh xksy uyh esa Lrjh;] vlaihM~; izokg esa vkSlr osx
vkSj vf/kdre osx ds chp vuqikr gksxk
(a) –1/2 (b) 1/3 (c) 2/3 (d) 1/2
22. fLFkj /kkjkjs[kh izokg ds fy, rjy ?kkZ.k ds fu;e ds
vuqlkj ?kkZ.k izfrjks/k esa ifjorZu gksrk gSa
(a) nkc ds lekuqikrh (b) nkc ds O;qRØekuqikrh
(c) nkc ij fuHkZj ugha djrk
(d) igys crk gS fQj ?kVrk gS
23. cjuwyh fl}kUr dh fuEufyf[kr esa ls dkSulh ekU;rk
lgh ugha gS
(a) izokg vfLFkj ugha gksuk pkfg,
(b) izokg larr gksuk pkfg,
(c) rjy laihM~; gksuk pkfg,
(d) izokg ?kkZ.kjfgr gksuk pkfg,
24. fdlh fo'kky ifg, dh ifjf/k ij vkjksfir likV Qydksa
dh Js.kh ij ,d tsV ds izR;{k la?kV~V ds ekeys esa
vf/kdre nzoh; n{krk D;k gksxh
(a) 33% (b) 50%
(c) 66% (d) dksbZ fu;r eku ugha gks
25. Vjckbuksa ds ,dleku n{krk oØ ;k nksuksa v{kks ij [khaps
tkrs gSa
(a) 'kfDr vkSj pky ds chp
(b) n{krk vkSj pky ds chp
(c) n{krk vkSj 'kfDr ds chp
(d) n{krk vkSj nkcksPprk ds chp
26. vidsUnzh iEi dh fof'kV pky dh ifjHkkkk ml pky ds
:i esa dh tkrh gS ftl ij iEi 1 ehVj nkcksPprk ds
varxZr folftZr djsxk
(a) 1 HP (b) 1 kW
(c) 1 m3
/sec (d) 1000 kg/sec
27. yacs LraHk dk {k; Hkkj] ftlds nksuksa fljs vkc} gksa]
feyrk gS
(a)
2
2
ELπ
l
(b)
2
2
EL
4
π
l
(c)
2
2
4 ELπ
l
(d)
2
2
2 ELπ
l
28. jSafUdu fl}kUr oS/k gSa
(a) yacs LraHk ds fy, (b) NksVs LraHk ds fy,
(c) nksuksa ds fy,
(d) mi;qZDr esa ls fdlh ds fy, Hkh ugha
29. Ioklksa vuqikr dk iz;ksx fd;k tkrk gS
(a) ,dfofe; fiaM esa (b) f}fofe; fiaM esa
(c) f=fofe; fiaM esa
(d) f}fofe; ,oa f=fofe; nksuksa fiaM es

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Q01 Which is the correct expression
(a)
1
E 2C 1
m
 
= + 
 
(b)
(c) (d)
31. At the point of contra flexure
(a) Shear force changes its behaviour
(b) Bending moment changes its behaviour
(c) Shear force is maximum
(d) Shear force is minimum
32. Proof resilience in a member is stored strain energy:
(a) Per unit Volume (b) In whole Volume
(c) Per unit area (d) Per unit length
33. In double slider crank chain, the number of revolute
pairs is/are
(a) 1 (b) 2 (c) 3 (d) 4
34. Oldham’s coupling is inversion of
(a) 4-bar chain (b) 6-bar chain
(c) Single slider crank chain
(d) Double slider crank chain
35. The product of module and circular pitch is–
(a) 1.0 (b) (c) (d)
36. The path of contact in cycloidal gear is
(a) Straight line (b) Curved line
(c) Circle (d) None of the above
37. Which one of the following is a gravity controlled
type governor?
(a) Hartnell governor (b) Hartung governor
(c) Watt governor (d) Pickering governor
38. The friction torque, transmitted in case of pivot
bearing for uniform ratio of wear is equal to
(a) (b)
(c)
1
WR
3
µ (d) 3 WRµ
30. lgh O;tad dkSulk gSa
(a) (b)
(c) (d)
31. izfr vkueu ds fcUnq ij
(a) vi:i.k cy viuk O;ogkj cny ysrk gSa
(b) cadu vk?kw.kZ viuk O;ogkj cny ysrk gSa
(c) vi:i.k cy vf/kdre gksrk gS
(d) vi:i.k cy U;wure gksrk gS
32. fdlh vo;o esa izek.k fod`fr mtkZ gksrh gS HkaMkfjr
fod`fr mtkZ
(a) izfr bdkbZ vk;ru (b) laiw.kZ vk;ru esa
(c) izfr bdkbZ {ks=Qy (d) izfr bdkbZ yackbZ
33. f}lihZ ØSad psu esa fjoksY;wV ;qXeksa dh la[;k gksrh gS
(a) 1 (b) 2 (c) 3 (d) 4
34. vksYSe ;qXeu fdldk O;qRØe.k gSa
(a) prqnZaM psu dk (b) kV~nZaM psu dk
(c) ,d lihZ ØSad psu dk
(d) f}lihZ ØSad psu dk
35. ekWM~;wy vkSj O;klh; fip dk xq.kuQy fdlds cjkcj
gksrk gSa
(a) 1.0 (b) (c) (d)
36. pØth; fx;j esa laidZ dk iFk gksrk gS
(a) _tq js[kk (b) oØ js[kk
(c) o`r (d) mi;qZDr esa ls dksbZ Hkh ugha
37. fuEufyf[kr esa ls dkSulk xq:Ro fu;af=r izdkj dk
xouZj gS
(a) gkVZusy xouZj (b) gkVkZax xouZj
(c) okV xouZj (d) fidfjax xouZj
38. fo?kkZ.k ds ,dleku vuqikr ds fy, likV dhyd
cs;fjax ds ekeys esa izsfkr yvk?kw.kZ cjkcj gksrk gS
(a) (b)
(c)
1
WR
3
µ (d) 3 WRµ