kom: unit 1: mechanisms: ob jective questions from gate with solutions

7/25/2019 KOM: Unit 1: MECHANISMS: Ob jective Questions From Gate With Solutions

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OBJECTIVE QUESTIONS FROM GATE/IES/IAS

1. Match the items in columns I and II [GATE-2006]Column I Column II

P. Higher kinematic pair 1. Grubler's equation

Q. Loer kinematic pair !. Line contact

". Quick return mechanism #. $uler's equation%. Mobilit& o a linkage (. Planer

). %haper

*. %urace contact+a, P-! Q-* "-( %-# +b, P-* Q-! "-( %-1

+c, P-* Q-! "-) %-# (d) P-2, Q-6, R-5, S-A!"#$%& d

!. /he minimum number o links in a single degree-o-reedom planar mechanism ith bothhigher and loer kinematic pairs is [GATE-2002]+a, ! +b, # (') +d, )

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#. /he number degrees o reedom o a planar linkage ith 0 links and simple re2olute 3oints is

[GATE-

2005]+a,1 +b, ! (') +d,(

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(. 4hen a c&linder is located in a 5-block then number o degrees o reedom hich are arrested

is [GATE-200]+a, ! +b, ( (') * +d, 0

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). /he number o degrees o reedom o a i2e link plane mechanism ith i2e re2olute pairs as

shon in the igure is [GATE-++]

+a, # +b,( (')2 +d, 1

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*. 6 planar mechanism has 0 links and 17 rotar& 3oints. /he number o degrees o reedom o the

mechanism using Grubler's criterion is [GATE-200]+a, 7 () +c, ! +d, #

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8. Match the approaches gi2en belo to perorm stated kinematics9d&namics anal&sis o

machine. [GATE -200+]

6nal&sis 6pproachP. Continuous relati2e rotation 1. :;6lembert;s principle

Q. 5elocit& and acceleration !. Grubler;s criterion

". Mobilit& #. Grasho;s la%. :&namic-static anal&sis (.


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11. /he mechanism used in a shaping machine is [GATE-200]

+a, 6 closed (-bar chain ha2ing ( re2olute pairs+b, 6 closed *-bar chain ha2ing * re2olute pairs

+c, 6 closed (-bar chain ha2ing ! re2olute and ! sliding pairs

(d) A! 9!?$%"9! 1 $ "9!:4$ "49d$%-'%.!7 '.9!

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1!. Match the olloing [GATE-200] /&pe o Mechanism Motion achie2ed

P. %cott - "ussel mechanism 1. Intermittent motion

Q. Gene2a mechanism !. Quick return motion". A-set slider-crank mechanism #. %imple harmonic motion

%. %cotch Boke mechanism (. %traight line motion+a, P-! Q-# "-1 %-( +b, P-# Q-! "-( %-1

(') P- Q- R-2 S-+d, P-( Q-# "-1 %-!

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1#. /he lengths o the links o a (-bar linkage ith re2olute pairs onl& are pq r and s units

p D q D r D s. 4hich o these links should be the i=ed one or obtaining a Edouble crankE

mechanismF [GATE-200]+a, Link o length p +b, link o length q

+c, Link o length r (d) 49!7 1 4$!: "A!"#$%& d

1(. Match List I ith List II and select the correct anser [IES-2002]List I +


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1). 6 round bar 6 passes through the c&lindrical hole in as shon in the gi2en igure. 4hich

one o the olloing statements is correct in this regardF [IES-++5]

+a, /he to links shon rom a kinematic pair.+b, /he pair is completel& constrained.

(') T$ .9% ." 9!'84$$ '!"%.9!;

+d, /he pair is successull& constrained.

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1*. Consider the olloing statements [IES-2000]1. 6 round bar in a round hole orm a turning pair

!. 6 square bar in a square hole orms a sliding pair#. 6 2ertical shat in a ootstep bearing orms a successul constraint.

A these statements

+a, 1 and ! are correct +b, 1 and # are correct

(') 2 .!d .%$ '%%$' +d, 1! and # are correct

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18. Match List I ith List II and select the correct anser using the codes gi2en belo the lists

List I List II [IES-+++]6. ( links ( turning pairs 1. Complete constraint. # links # turning pairs !. %uccessul constraint

C. ) links ) turning pairs #. "igid rame

:. Jootstep bearing (. Incomplete constraint

6 C : 6 C :+a, # 1 ( ! +b, 1 # ! (

+c, # 1 ! ( (d) 2

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10. Consider the olloing statements

1. /he degree o reedom or loer kinematic pair is ala&s equal to one.!. 6 ball-and-socket 3oint has # degrees o reedom and is a higher kinematic pair.

#. Aldham;s coupling mechanism has to prismatic pairs and to re2olute pairs.

4hich o the statements gi2en abo2e is9are correctF


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(.) ,2 .!d +b, 1 and # +c,!# and ( +d,1!# and (

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1. 4hich o the olloing are e=amples o orced closed kinematic pairsF [IES-200]1. Cam and roller mechanism !. :oor closing mechanism

#. %lider-crank mechanism (. 6utomoti2e clutch operating mechanism%elect the correct anser using the codes gi2en belo Codes

(.) , 2 .!d +b, 1 and # +c, ! # and ( +d, 1 ! # and (

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!7. 6ssertion +6, H&draulic luid is one orm a link. [IES-++6]

"eason +", 6 link need not necessaril& be a rigid bod& but it must be a resistant bod&.(.) B A .!d R .%$ 9!d9?9d3.44@ %3$ .!d R 9" $ '%%$' $4.!.9! 1 A+b, oth 6 and " are indi2iduall& true but " is not the correct e=planation o 6+c, 6 is true but " is alse

+d, 6 is alse but " is true

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kom: unit 1: mechanisms: ob jective questions from gate with solutions

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