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Technical Questions Asked In Cummins

Technical Questions

1.The stiffness coefficient kij; indicates

A.Force at i due to a unit deformation at j
B.Deformation at j due to a unit force at i
C.Deformation at I due to a unit force at j
D.Force at j due to a unit deformation at i

Answer & Explanation

Answer: Option A.

Stiffness coefficient Kij =Force required to produce unit deformation and Kij means force required in I for unit deformation at j.

2.The number of independent elastic constants for a linear elastic isotropic and homogenous material is

A.4
B.3
C.2
D.1

Answer & Explanation

Answer: Option C.

3.CnH2n+2 is the general formula of :

A.Paraffins
B.Naphthenes
C.Olefins
D.Aromatics

Answer & Explanation

Answer: Option A.

4.Naphthenic acid is a:

A.Nitrogen compound
B.Hydrocarbon
C.Oxygen compound
D.None of these

Answer & Explanation

Answer: Option C.

5.Neutral flame is used for welding

A.Brasses only
B.Bronzes only
C.Brasses and bronzes
D.None of these

Answer & Explanation

Answer: Option C.

6.Which of the following has highest thermal diffusivity?

A.Iron
B.Lead
C.Wood
D.None of these

Answer & Explanation

Answer: Option B

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