ISRO Technician-B Fitter Question Paper - 2016 (Set - 3) with Answer Key

ISRO Technician-B Fitter Question Paper - 2016 (Set - 3) with Answer Key

21) Which of the following statements are true 1. Stress and Pressure are measured in units of Load/Area 2. Intensity of Pressure at a point is same in all directions whereas Stress depends on load and direction. 3. Pressure and Stress are scalar.

Answer is:

1 and 2 only

22) Poisson's ratio of which of t he following materials is nearly zero.

Answer is:

Cork

Explanation:

Poisson's ratio is defined as the ratio of Lateral strain and longitudinal strain.

Poisson's ratio of which of t he following materials is nearly zero.

23) The stress developed in a thin spherical shell (thickness t and diameter D) subjected to an internal pressure P is:

Answer is:

(PD/4t)

24) Endurance limit depends on 1. Material 2. Size 3. Surface finish 4. Type of loading

Answer is:

1, 2, 3, 4

25) Shot peening increases the fatigue life of springs because it results in

Answer is:

Residual compression at surface

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