480 Important Theory of Machines MCQ Question and Answer | PDF Free Download
1.The lower pairs are _________ pairs
- ASelf-closed √2
- BForce-closed
- CFriction closed
- DNone of these
2.A kinematic chain is known as a mechanism when
- ANone of the links is fixed
- BOne of the links is fixed
- CTwo of the links are fixed
- DTwo of the links are fixed
3.In considering friction of a V-thread, the virtual coefficient of friction (μ₁) is given by
- Aμ₁ = μ sin β
- Bμ₁ = μ cos β
- Cμ₁ = μ/sin β
- Dμ₁ = μ/cos β
4.A pantograph is a mechanism with
- ALower pairs
- BHigher pairs
- CRolling pairs
- DTurning pairs
5.A ball and a socket forms a
- ATurning pair
- BRolling pair
- CScrew pair
- DSpherical pair
6.In a gear having involute teeth, the normal to the involute is a tangent to the
- APitch circle
- BBase circle
- CAddendum circle
- DDedendum circle
7.A mechanism is an assemblage of
- ATwo links
- BThree links
- CFour or more than four links
- DAll of these
8.Which type of gear train is used in clock mechanism to join hour hand and minute hand?
- ASimple gear train
- BCompound gear train
- CReverted gear train
- DEpicyclic gear train
9.A circle passing through the pitch point with its center at the center of cam axis is known as
- APitch circle
- BBase circle
- CPrime circle
- DOuter circle
10.Cylindrical cams can be classified as
- ACircular
- BTangent
- CReciprocating
- DNone of the above
11.When a rigid body is suspended vertically and it oscillates with a small amplitude under the action of the force of gravity, the body is known as
- ASimple pendulum
- BCompound pendulum
- CTorsional pendulum
- DSecond's pendulum
12.The type of coupling used to join two shafts whose axes are neither in same straight line nor parallel, but intersect is
- AFlexible coupling
- BUniversal coupling
- CChain coupling
- DOldham's coupling
13.The pressure angle of a cam depends upon
- AOffset between center lines of cam and follower
- BLift of follower
- CAngle of ascent
- DAll of the above
14.The size of cam depends upon
- ABase circle
- BPitch circle
- CPrime circle
- DPitch curve
15.Klein's construction can be used when
- ACrank has a uniform angular velocity
- BCrank has non-uniform velocity
- CCrank has uniform angular acceleration
- DCrank has uniform angular velocity and angular acceleration
16.For the same lift and same angle of ascent, a smaller base circle will give
- AA small value of pressure angle
- BA large value of pressure angle
- CThere is no such relation with pressure angle
- DSomething else
17.Klein's construction gives a graphic construction for
- ASlider-crank mechanism
- BVelocity polygon
- CAcceleration polygon
- DFour bar chain mechanism
18.For simple harmonic motion of the of follower, a cosine curve represents
- ADisplacement diagram
- BVelocity diagram
- CAcceleration diagram
- DAll of the above
19.The locus of a point on a thread unwound from a cylinder will be
- AA straight line
- BA circle
- CInvolute
- DCycloidal
20.In a circular arc cam with roller follower, the acceleration in any position of the lift will depend only upon
- ATotal lift, total angle of lift, minimum radius of cam and cam speed
- BRadius of circular arc, cam speed, location of centre of circular arc and roller diameter
- CMass of cam follower linkage, spring stiffness and cam speed
- DTotal lift, centre of gravity of the cam and cam speed