# Practice Test: Question Set - 01

**1. The motion between a pair which takes place in __________ is known as incompletely constrained motion.**

- (A) One
direction only

- (B) Two
directions only

- (C) More
than one direction

- (D) None
of these

**2. A torsional system with discs of moment of inertia**

*I₁*and*I₂*as shown in the below figure, is gear driven such that the ratio of speed of shaft*B*to shaft*A*is '*G*'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft*B*at the speed of shaft*A*is equal to- (A)

*G*.

*I₂*

- (B)

*G²*.

*I*₂

- (C)

*I₂*/

*G*

- (D)

*I₂*/

*G²*

**3. The frictional torque transmitted in a flat pivot bearing, considering uniform pressure, is (where**

*Î¼*= Coefficient of friction,*W*= Load over the bearing, and*R*= Radius of bearing surface)- (A)

*(1/2) Î¼ W R*

- (B)

*(2/3) Î¼ W R*

- (C)

*(3/4) Î¼ W R*

- (D)

*Î¼ W R*

**4. A typewriter mechanism has 7 numbers of binary joints, six links and none of higher pairs. The mechanism is**

- (A) Kinematically
sound

- (B) Not
sound

- (C) Soundness
would depend upon which link is kept fixed

- (D) Data
is not sufficient to determine same

**5. The magnitude of velocities of the points on a rigid link is**

- (A) Directly
proportional to the distance from the points to the instantaneous center and is
parallel to the line joining the point to the instantaneous center

- (B) Directly
proportional to the distance from the points to the instantaneous center and is
perpendicular to the line joining the point to the instantaneous center

- (C) Inversely
proportional to the distance from the points to the instantaneous center and is
parallel to the line joining the point to the instantaneous center

- (D) Inversely
proportional to the distance from the points to the instantaneous center and is
perpendicular to the line joining the point to the instantaneous center

**6. The maximum efficiency of spiral gears is (where**

*Î¸*= Shaft angle, and*Ï†*= Friction angle)- (A)

*sin*(

*Î¸*+

*Ï†*) + 1/

*cos*(

*Î¸*-

*Ï†*) + 1

- (B)

*cos*(

*Î¸*-

*Ï†*) + 1/

*sin*(

*Î¸*+

*Ï†*) + 1

- (C)

*cos*(

*Î¸*+

*Ï†*) + 1/ cos (

*Î¸*-

*Ï†*) + 1

- (D)

*cos*(

*Î¸*-

*Ï†*) + 1/

*cos*(

*Î¸*+

*Ï†*) + 1

**7. If the opposite links of a four bar linkage are equal, the links will always form a**

- (A) Triangle

- (B) Rectangle

- (C) Parallelogram

- (D) Pentagon

**8. The velocity of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by**

- (A)

*Ï‰R cosÎ¸*

- (B)

*Ï‰(R - r₁) cosÎ¸*

- (C)

*Ï‰(R - r₁) sinÎ¸*

- (D)

*Ï‰r₁ sinÎ¸*

**9. Two systems shall be dynamically equivalent when**

- (A) The
mass of two are same

- (B) C.G.
of two coincides

- (C) M.I.
of two about an axis through e.g. is equal

- (D) All
of the above

**10. The motion of a shaft in a circular hole is an example of**

- (A) Completely
constrained motion

- (B) Incompletely
constrained motion

- (C) Successfully
constrained motion

- (D) None
of these

**11. A rotary internal combustion engine has __________ cylinders.**

- (A) Four

- (B) Five

- (C) Six

- (D) Seven

**12. Cam size depends upon**

- (A) Base circle

- (B) Pitch circle

- (C) Prime circle

- (D) Outer circle

**13. A**

*point**B*on a rigid link*AB*moves with respect to*A*with angular velocity Ï‰ rad/s. The total acceleration of*B*with respect to*A*will be equal to- (A) Vector sum of radial component and Coriolis component

- (B) Vector sum of tangential component and Coriolis component

- (C) Vector sum of radial component and tangential
component

- (D) Vector difference of radial component and
tangential component

**14. The equation of motion for a vibrating system with viscous damping is**

*(d²x/dt²)*+*(c/m).(dx/dt)*+*(s/m).x = 0,*if the roots of the equation are __________ then the system will be under damped.

- (A) Equal

- (B) Real

- (C) Complex conjugate

- (D) None of these

**15. The purpose of a link is to**

- (A) Transmit
motion

- (B) Guide
other links

- (C) Act
as a support

- (D) All of the above

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