  ### 1.The lower pairs are _________ pairs

• ASelf-closed √2
• BForce-closed
• CFriction closed
• DNone of these

Self-closed √2

Explanation:

The lower pairs are Self-closed pairs.

### 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

One of the links is fixed

Explanation:

### 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

μ₁ = μ/cos β

Explanation:

### 4.A pantograph is a mechanism with

• ALower pairs
• BHigher pairs
• CRolling pairs
• DTurning pairs

Lower pairs

Explanation:

### 5.A ball and a socket forms a

• ATurning pair
• BRolling pair
• CScrew pair
• DSpherical pair

Spherical pair

Explanation:

### 6.In a gear having involute teeth, the normal to the involute is a tangent to the

• APitch circle
• BBase circle
• DDedendum circle

Base circle

Explanation:

### 7.A mechanism is an assemblage of

• CFour or more than four links
• DAll of these

Four or more than four links

Explanation:

### 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

Epicyclic gear train

Explanation:

### 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

Prime circle

Explanation:

### 10.Cylindrical cams can be classified as

• ACircular
• BTangent
• CReciprocating
• DNone of the above

None of the above

Explanation:

### 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

Compound pendulum

Explanation:

### 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

Universal coupling

Explanation:

### 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

All of the above

Explanation:

### 14.The size of cam depends upon

• ABase circle
• BPitch circle
• CPrime circle
• DPitch curve

Base circle

Explanation:

### 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

Crank has a uniform angular velocity

Explanation:

### 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

A large value of pressure angle

Explanation:

### 17.Klein's construction gives a graphic construction for

• ASlider-crank mechanism
• BVelocity polygon
• CAcceleration polygon
• DFour bar chain mechanism

Acceleration polygon

Explanation:

### 18.For simple harmonic motion of the of follower, a cosine curve represents

• BVelocity diagram
• CAcceleration diagram
• DAll of the above

Acceleration diagram

Explanation:

### 19.The locus of a point on a thread unwound from a cylinder will be

• AA straight line
• BA circle
• CInvolute
• DCycloidal

Involute

Explanation:

### 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