480 Important Theory of Machines MCQ Question and Answer | PDF Free Download
1.In gears, interference takes place when
- AThe tip of a tooth of a mating gear digs into the portion between base and root circles
- BGears do not move smoothly in the absence of lubrication
- CPitch of the gears is not same
- DGear teeth are undercut
2.A typewriter mechanism has 7 numbers of binary joints, six links and none of higher pairs. The mechanism is
- AKinematically sound
- BNot sound
- CSoundness would depend upon which link is kept fixed
- DData is not sufficient to determine same
3.A reed type tachometer use the principle of
- ALongitudinal vibration
- BTorsional vibration
- CTransverse vibration
- DDamped free vibration
4.Sensitiveness of the governor is defined as the ratio of the
- AMean speed to the maximum equilibrium speed
- BMean speed to the minimum equilibrium speed
- CDifference of the maximum and minimum equilibrium speeds to the mean speed
- DSum of the maximum and minimum equilibrium speeds to the mean speed
5.The direction of linear velocity of any point on a link with respect to another point on the same link is
- AParallel to the link joining the points
- BPerpendicular to the link joining the points
- CAt 45? to the link joining the points
- DNone of the above
6.Higher pairs are those which have
- APoint or line contact between the two elements when in motion
- BSurface contact between the two elements when in motion
- CElements of pairs not held together mechanically
- DTwo elements that permit relative motion
7.Lower pairs are those which have
- APoint or line contact between the two elements when in motion
- BSurface contact between the two elements when in motion
- CElements of pairs not held together mechanicallyTwo elements that permit relative motion
- DTwo elements that permit relative motion
8.Open pairs are those which have
- APoint or line contact between the two elements when in motion
- BSurface contact between the two elements when in motion
- CElements of pairs not held together mechanically
- DTwo elements that permit relative motion
9.When the two elements of a pair have __________ when in motion, it is said to a lower pair.
- ALine or point contact
- BSurface contact
- CBody contact
- DNone of these
10.The frequency of oscillation at compared to earth will be
- A6 times more
- B6 times less
- C2.44 times more
- D2.44 times less
11.When brakes are applied to all the four wheels of a moving car, the distance traveled by the car before it is brought to rest, will be
- AMaximum
- BMinimum
- CZero
- DNone of these
12.The frictional torque transmitted in a conical pivot bearing with assumption of uniform pressure is __________ as compared to uniform wear.
- ALess
- BMore
- CSame
- DNone of these
13.The frictional torque transmitted in a flat pivot bearing with assumption of uniform pressure is _________ as compared to uniform wear.
- ALess
- BSame
- CMore
- DNone of these
14.Bifilar suspension method is used to find the
- AAngular acceleration of the body
- BMoment of inertia of the body
- CPeriodic time of the body
- DFrequency of vibration of the body
15.Scotch yoke mechanism is used to generate
- ASine functions
- BSquare roots
- CLogarithms
- DInversions
16.V-belts are usually used for
- ALong drives
- BShort drives
- CLong and short drives
- DNone of these
17.A body is said to be under forced vibrations, when
- AThere is a reduction in amplitude after every cycle of vibration
- BNo external force acts on a body, after giving it an initial displacement
- CA body vibrates under the influence of external force
- DNone of the above
18.The lead screw of a lathe with nut forms a
- ARolling pair
- BSliding pair
- CScrew pair
- DTurning pair
19.The C.G. of a link in any mechanism would experience
- ANo acceleration
- BLinear acceleration
- CAngular acceleration
- DBoth angular and linear accelerations
20.When two pulleys are connected by means of a cross belt drive, then both the pulleys will rotate in _________ directions.
- ASame
- BOpposite
- CPerpendicular
- DNone of these