Mechanical Engineering - Online Test
Q1. A shaft has a dimension, 
The respective values of fundamental deviation
and tolerance are
The respective values of fundamental deviation
and tolerance are
Answer : Option D
Explaination / Solution:
No Explaination.
Q2. Which of the following relationships is valid only for reversible processes undergone
by a closed system of simple compressible substance (neglect changes in kinetic
and potential energy?)
Answer : Option D
Explaination / Solution:
No Explaination.
Q3. You are given three coins: one has heads on both faces, the second has tails on both faces, and the third has a head on one face and a tail on the other. You choose a coin at random and toss it, and it comes up heads. The probability that the other face is tails is
Answer : Option B
Explaination / Solution:
No Explaination.
Q4. 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.
Q5. Water has a critical specific volume of 0.003155 / m3 kg. A closed and rigid steel
tank of volume 0.025 m3 contains a mixture of water and steam at 0.1MPa. The
mass of the mixture is 10 kg. The tank is now slowly heated. The liquid level
inside the tank
Answer : Option A
Explaination / Solution:
No Explaination.
Q6. For matrices of same dimension M , N and scalar c, which one of these properties DOES NOT ALWAYS hold ?
Answer : Option D
Explaination / Solution:
Let the matrices
i.e. the property holds always
i.e. property does not hold always.
Q7. 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.
Q8. Consider an incompressible laminar boundary layer flow over a flat plate of length L, aligned with the direction of an incoming uniform free stream. If F is the ratio of the drag force on the front half of the plate to the drag force on the rear half,
then
Answer : Option D
Explaination / Solution:
No Explaination.
Q9. C is a closed path in the z -plane by |z| = 3 The value of the integral 
is
is
Answer : Option C
Explaination / Solution:
Integral,
So, we have the singularity
z j + 2 = 0
z =- 2j
Since, z = -2j lies inside |z| = 3. Therefore, using cauchy’s integral, we get
Q10. 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.
