Question37:-Design of shafts made of brittle material is based on
A:-Guest's theory
B:-St. Venant's theory
C:-Von-mises theory
D:-Rankine's theory
Correct Answer:- Option-D
Question38:-The highest stress that a material can with stand for a specified length of time with out excessive deformation
is called
A:-fatique strength
B:-endurance strength
C:-creep strength
D:-creep rupture strength
Correct Answer:- Option-C
Question39:-When the addenda of pinion and wheel is such that the path of approach and path of recess are half of their
maximum possible values then the length of path of contact is given by,
r pitch circle radius of pinion
R pitch circle radius of wheel
‘Phi’ pressure angle
A:~((R+r) sinPhi)/(2)°
((R+r) cosPhi)/(2)°
((R+r) tanPhi)/(2)°

Correct Answer:- Option-A
Question40:-In a clock mechanism, the gear train used to connect minute hand to hour hand is
A:-Epicyclic gear train
B:-Reverted gear train
C:-Compound gear train
D:-Simple gear train
Correct Answer:- Option-B
Question41:-The angle between the direction of follower motion and a normal to pitch curve is called
A:-Pitch angle
B:-Prime angle
C:-Base angle
D:-Pressure angle
Correct Answer:- Option-D
Question42:-The ratio of height of Porter Governor (When length of arms and links are equal) to the height of Watt's
Governor is
m-mass of ball and M-mass of the load on sleeve.
(m)/(m+M)°
(M)/(m+M)*
(m+M)/(m)*
D:-* (m+M)/(M)°
Correct Answer:- Option-C

Question43:-To restore stable operating condition in a hydrodynamic journal bearing, when it encounters higher magnitude
loads

A:-Oil viscosity is to be decreased
B:-Oil viscosity is to be increased
C:-Oil viscosity index is to be increased
D:-Oil viscosity index is to be decreased
Correct Answer:- Option-B
Question44:-A flywheel of moment of inertia 9-8 Kg’m*(2)° fluctuates by 30 rpm for a fluctuation of energy of 19360 J. The
mean speed of the flywheel is in rpm
A:-600
8:-900
C:-968
D:-2940
Correct Answer:- Option-A
Question45:-The number of elastic constants for a completely anisotropic elastic material are
‏3ھ‎
‎B:-4