Mechanical Engineering - Online Test
Q1. In a quadratic function, the value of the product of the roots (α, β) is 4. Find the value of 
Answer : Option A
Explaination / Solution:
Q2. A triangular–shaped cantilever beam of uniform–thickness is shown in the figure.
The Young’s modulus of the material of the beam is E. A concentrated load P is
applied at the free end of the beam.
The area moment of inertia about the neutral axis of a cross-section at a distance
x measured from the free end is
Answer : Option B
Explaination / Solution:
No Explaination.
Q3. If a mass of moist air contained in a closed metallic vessel is heated, then its
Answer : Option A
Explaination / Solution:
Given that mass of moist air contained in a closed metallic vessel is heated, means its specific
humidity (𝜔) is constant.
So, from the psychometric chart, 
We can say that at constant specific humidity, as temperature increases relative humidity
decreases i.e.,(Φ2<Φ1)
Q4. For a ductile material, toughness is a measure of
Answer : Option B
Explaination / Solution:
Explanations:-
Since, toughness has ability to absorb energy up to fracture
Since, toughness has ability to absorb energy up to fracture
Q5. 
Choose the correct expression for f(x) given in the graph.
Answer : Option C
Explaination / Solution:
No Explaination.
Q6. A triangular–shaped cantilever beam of uniform–thickness is shown in the figure. The Young’s modulus of the material of the beam is E. A concentrated load P is applied at the free end of the beam.
The maximum deflection of the beam is
Answer : Option D
Explaination / Solution:
No Explaination.
Q7. In a counter-flow heat exchanger, water is heated at the rate of 1.5kg/s from 40°C to 80°C by
an oil entering at 120°C and leaving at 60°C. The specific heats of water and oil are
4.2kJ/kg.K and 2kJ/kg.K respectively. The overall heat transfer coefficient is 400 W/m2.K.
The required heat transfer surface area (in m2) is
Answer : Option D
Explaination / Solution:
Given counter flow Heat Exchanger
Q8. The function of interpolator in a CNC machine controller is to
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. The Laplace Transform of f(t) = e2t sin(5t) u(t) is
Answer : Option A
Explaination / Solution:
Q10. A cantilever beam of length L and flexural modulus EI is subjected to a point load P at the free
end. The elastic strain energy stored in the beam due to bending (neglecting transverse shear)
Answer : Option A
Explaination / Solution:
