# Practice Test: Question Set - 24

**1. The relation between the controlling force (**

*F*) and radius of rotation (_{c}*r*) for a stable spring controlled governor is- (A)

*F*=

_{c}*ar*+

*b*

- (B)

*F*=

_{c}*ar - b*

- (C)

*F*=

_{c}*ar*

- (D)

*F*=

_{c}*a*/

*r*+

*b*

**2. Pitch point on a cam is**

- (A) Any point on pitch curve

- (B) The point on cam pitch curve
having the maximum pressure angle

- (C) Any point on pitch circle

- (D) The point on cam pitch curve
having the minimum pressure angle

**3. The indicator using Watt mechanism is known as**

- (A) Thompson indicator

- (B) Richard indicator

- (C) Simplex
indicator

- (D) Thomson
indicator

**4. When the radius of rotation of balls __________ as the equilibrium speed increases, the governor is said to be unstable.**

- (A) Remains constant

- (B) Decreases

- (C) Increases

- (D) None of these

**5. If the controlling force line for a spring controlled governor when produced intersects the Y-axis at the origin, then the governor is said to be**

- (A) Stable

- (B) Unstable

- (C) Isochronous

- (D) None of these

**6. When the relation between the controlling force (**

*F*) and radius of rotation (_{c}*r*) for a spring controlled governor is*F*=_{c}*ar*+*b*, then the governor will be- (A) Stable

- (B) Unstable

- (C) Isochronous

- (D) None of
these

**7. For an isochronous Hartnell governor (where**

*r₁*and*r₂*= Maximum and minimum radius of rotation of balls respectively,*S₁*and*S₂*= Maximum and minimum force exerted on the sleeve respectively, and*M*= Mass on the sleeve)- (A)

*(m.g + S₁)/(m.g + S₂) = r₁/r₂*

- (B)

*(m.g - S₁)/(m.g - S₂) = r₂/r₁*

- (C)

*S₁/S₂ = r₁/r₂*

- (D)

*S₂/S₁ = r₁/r₂*

**8. The absolute acceleration of any point ‘P’ in a link about center of rotation ‘O’ is**

- (A) Along PO

- (B) Perpendicular to PO

- (C) At 45° to PO

- (D) None of the above

**9. Pulley in a belt drive acts as**

- (A) Cylindrical
pair

- (B) Turning pair

- (C) Rolling pair

- (D) Sliding pair

**10. The frictional torque transmitted by a disc or plate clutch is same as that of**

- (A) Flat pivot
bearing

- (B) Flat
collar bearing

- (C) Conical
pivot bearing

- (D) Truncated
conical pivot bearing

**11. The relation**

*l**= (2/3).(j + 2)*apply only to kinematic chains in which lower pairs are used. This may be used to kinematic chains in which higher pairs are used, but each higher pair may be taken as equivalent to- (A) One
lower pair and two additional links

- (B) Two
lower pairs and one additional link

- (C) Two
lower pairs and two additional links

- (D) Any
one of these

**12. When a mass of a critically damped single degree of freedom system is deflected from its equilibrium position and released, then it will**

- (A) Return
to equilibrium position without oscillation

- (B) Oscillate
with increasing time period

- (C) Oscillate
with decreasing amplitude

- (D) Oscillate
with constant amplitude

**13. Bifilar suspension method is used to find the**

- (A) Angular
acceleration of the body

- (B) Moment
of inertia of the body

- (C) Periodic
time of the body

- (D) Frequency of
vibration of the body

**14. The engine of an aeroplane rotates in clockwise direction when seen from the tail end and the aeroplane takes a turn to the left. The effect of gyroscopic couple on the aeroplane will be**

- (A) To dip the nose and tail

- (B) To raise the nose and tail

- (C) To raise the nose and dip the tail

- (D) To dip the nose and raise the tail

**15. The centre distance between two meshing involute gears is equal to**

- (A) Sum of base
circle radii /

*cosφ*

- (B) Difference
of base circle radii /

*cosφ*

- (C) Sum of pitch
circle radii /

*cosφ*

- (D) Difference
of pitch circle radii /

*cosφ*

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