64.

65.

66.

67.

68.

050/23

Which of the following statements are true ?
i. Interference occurs in involute gears.
ii. Involute profile gears are easy to manufacture.
iii. With involute tooth form, the centre distance errors do not affect the velocity
ratio.

A) iand ii only B) ii and iii only
C) iand iii only D) i, ii and iii

Match the following.

۲ Q
i. Worm Gear Drive i. Shafts are intersecting at an angle
ர்‌. Oldham’s coupling ர்‌. Approximate straight-line mechanism
iii. Paucellier Mechanism iii. Large speed reduction

iv. Co-axial shafts with a small misalignment
v. Exact straight-line Mechanism
A) Pi- Qiii, Pii— Qiv, Piii — Qii B) Pi-Qiii, Pii— Qiv, Piii- Qv
C) Pi-Qiii, Pii— Qi, Piii- Qii ഉ) Pi- Qiii, Pii— Qi, Piii- Qv

A cantilever beam with length L, moment of inertia of cross section | with respect to
the neutral axis, and modulus of elasticity E carries a machine of weight W at its free
end. Neglecting the mass of the beam, what is the frequency of free vibration of the
system ?

= ‏کا‎
‎_ [3851 _ ഗ്‌

oF we 9) ०7 3Elg

(ae =

_ | Wi 3Elg

0) ०7४ 48816 D) oF we

A single plate clutch having single side friction has outer and inner diameters of 100 mm
and 40 mm respectively. Assuming a uniform pressure of 2 MPa and coefficient of
friction of the liner material is 0.4, the torque carrying capacity of the clutch is
A) 150 Nm B) 372 Nm C) 196 Nm D) 490 Nm

The life of a ball bearing at a load of 10 kN is 8000 hrs. Its life in hours if the load is
increased to 20 KN, keeping all other conditions the same, is
A) 1000 B) 2000 C) 500 D) 4000