ISRO Technical Assistant Mechanical Question Paper

16) A 5 m long ladder is resting on a smooth vertical wall with its lower end 3m from the wall. What should be the coefficient of friction between the ladder and the floor for equilibrium?

Answer is:

(3/8)

17) Newton's law of viscosity states that for a Newtonian fluid, the

Answer is:

Shear stress is proportional to rate of shear strain

Explanation:

According to Newton’s law of viscosity, the shear stress on a layer of a fluid is directly proportional to the rate of shear strain. Ideal fluid is a fluid with zero viscosity. Real fluids possess viscosity.

Newton's law of viscosity states that for a Newtonian fluid, the

18) Anodizing is the most commonly applied surface treatment for the alloys of

Answer is:

Aluminium

19) For a cemented carbide turning tool, Tailor's tool life exponent is 0.25. If the cutting speed halved, the tool life will increase by

Answer is:

Sixteen times

20) For the same maximum pressure and heat input, the maximum air standard efficiency is for

Answer is:

ISRO Technical Assistant Mechanical Question Paper - 2017 with Answer Key

16) A 5 m long ladder is resting on a smooth vertical wall with its lower end 3m from the wall. What should be the coefficient of friction between the ladder and the floor for equilibrium?

(3/8)

17) Newton's law of viscosity states that for a Newtonian fluid, the

Shear stress is proportional to rate of shear strain

18) Anodizing is the most commonly applied surface treatment for the alloys of

Aluminium

19) For a cemented carbide turning tool, Tailor's tool life exponent is 0.25. If the cutting speed halved, the tool life will increase by

Sixteen times

20) For the same maximum pressure and heat input, the maximum air standard efficiency is for

Diesel cycle