Mechanical Engineering - Online Test
Q1. A 10 mm diameter electrical conductor is covered by an insulation of 2 mm thickness. The
conductivity of the insulation is 0.08 W/m-K and the convection coefficient at the insulation
surface is 10 W/m2 -K. Addition of further insulation of the same material will
Answer : Option C
Explaination / Solution:
No Explaination.
Q2. A fillet welded joint is subjected to transverse loading F as shown in the figure. Both legs of the
fillets are of 10 mm size and the weld length is 30 mm. If the allowable shear stress of the weld is
94 MPa, considering the minimum throat area of the weld, the maximum allowable transverse
load in kN is
Answer : Option C
Explaination / Solution:
No Explaination.
Q3. The expression ((x + Y) - |x - y|)/2 is equal to
Answer : Option B
Explaination / Solution:
Q4. A long thin walled cylindrical shell, closed at both ends, is subjected to an internal pressure. The ratio of the hoop stress (circumferential stress) to longitudinal stress developed in the shell is
Answer : Option C
Explaination / Solution:
Q5. Match the following pairs:
Answer : Option C
Explaination / Solution:
No Explaination.
Q6. In a single pass drilling operation, a through hole is 15 mm diameter is to be drilled in a steel
plate of 50 mm thickness. Drill spindle speed is 500 rpm, feed is 0.2 mm/rev and drill point angle
is 118°. Assuming 2 mm clearance at approach and exit, the total drill time (in seconds) is
Answer : Option A
Explaination / Solution:
No Explaination.
Q7. The value of the quantity P, where 
is equal to
is equal to
Answer : Option B
Explaination / Solution:
No Explaination.
Q8. Which one of the following types of stress-strain relationship best describes the behavior of
brittle materials, such as ceramics and thermosetting plastics, (σ = stress and ε = strain)?
Answer : Option D
Explaination / Solution:
No Explaination.
Q9. Considering massless rigid rod and small oscillations, the natural frequency (in rad/s) of
vibration of the system shown in the figure is
Answer : Option D
Explaination / Solution:
No Explaination.
Q10. Details pertaining to an orthogonal metal cutting process are given below.
Chip thickness ratio 0.4
Undeformed thickness 0.6 mm
Rake angle +10°
Cutting speed 2.5 m/s
Mean thickness of primary shear zone 25 microns
The shear strain rate in during the s-1 process is
Answer : Option C
Explaination / Solution:
No Explaination.
