Applied Mechanics and Design - Online Test
Q1. Torque exerted on a flywheel over a cycle is listed in the table. Flywheel energy
(in J per unit cycle) using Simpson’s rule is
Answer : Option B
Explaination / Solution:
No Explaination.
Q2. A band brake having band-width of 80mm, drum diameter of 250mm, coefficient
of friction of 0.25 and angle of wrap of 270 degrees is required to exert a friction
torque of 1000N-m. The maximum tension (in kN) developed in the band is
Answer : Option D
Explaination / Solution:
No Explaination.
Q3. A bracket (shown in figure) is rigidly mounted on wall using four rivets. Each rivet
is 6mm in diameter and has an effective length of 12mm.
Direct shear stress (in MPa) in the most heavily loaded rivet is
Answer : Option B
Explaination / Solution:
No Explaination.
Q4. A mass m attached to a spring is subjected to a harmonic force as shown in
figure. The amplitude of the forced motion is observed to be 50mm. the value of
m (in kg) is
Answer : Option A
Explaination / Solution:
No Explaination.
Q5. For the epicyclic gear arrangement shown in the figure, ω2 = 100rad / s clockwise
(CW) and ωarm = 80rad / s counter clockwise (CCW). The angular velocity ω5 (in rad/s) is
Answer : Option C
Explaination / Solution:
No Explaination.
Q6. A lightly loaded full journal bearing has a journal of 50mm, bush bore of
50.05mm and bush length of 20mm. if rotational speed of journal is 1200rpm
and average viscosity of liquid lubricant is 0.03 Pa s, the power loss (in W) will be
Answer : Option A
Explaination / Solution:
No Explaination.
Q7. For the configuration shown, the angular velocity of link AB is 10 rad/s
counterclockwise. The magnitude of the relative sliding velocity (in ms-1) of slider
B with respect to rigid link CD is
Answer : Option D
Explaination / Solution:
No Explaination.
Q8. Two pipes of inner diameter 100 mm and outer diameter 110 mm each are joined
by flash-butt welding using 30 V power supply. At the interference, 1 mm of
material melts from each pipe which has a resistance of 42.4Ω. If the unit melt
energy is 64.4 MJm-3, then time required for welding (in s) is
Answer : Option C
Explaination / Solution:
No Explaination.
Q9. A massless beam has a loading pattern as shown in the figure. The beam is of
rectangular cross-section with a width of 30mm and height of 100mm.
The maximum bending moment occurs at
Answer : Option C
Explaination / Solution:
No Explaination.
Q10. A massless beam has a loading pattern as shown in the figure. The beam is of
rectangular cross-section with a width of 30mm and height of 100mm.
The maximum magnitude of bending stress (in MPa) is given by
Answer : Option B
Explaination / Solution:
No Explaination.
