1. What is bulk modulus of elasticity?
It represents the compressibility of a fluid. It is the ratio of the change in unit pressure to the corresponding volume change per unit of volume.
2. Why entropy decreases with the increase in temperature?
-ds=dQ/T Entropy is inversely proportional to the temperature so, as temp Increases, entropy decreases.
3. 1 hp how much watt?
746.2Watt
4.How to know whether the valve is inlet or exhaust by seeing the engine?
Inlet valve has more diameter than exhaust valve.
5. Give the relationship between Bulk Modulus and Young’s Modulus.
E = 3K (1-2/m) Where, E - Young’s Modulus K - Bulk Modulus 1/m - Poisson’s ratio
6. Define modulus of Rigidity.
The shear stress is directly proportional to shear strain and the constant is called modulus of rigidity.
7. What is compound bar?
A composite bar composed of two or more different materials joined together such that system is elongated or compressed in a single unit.
8. What you mean by thermal stresses?
If the body is allowed to expand or contract freely, with the rise or fall of temperature no stress is developed but if free expansion is prevented the stress developed is called temperature stress or strain.
9. What do you understand by critical points in iron, iron-carbide diagram?
The temperatures at which the phase changes occur are called critical points (or temperatures).
10. Which has more Efficiency Diesel Engine or Petrol Engine?
Diesel engine has the better efficiency out of two.
11. What is Difference between stamina and strength?
Strength is capability over a short length of time and Stamina is the ability to keep going continuously.
12. Distinguish between creep and fatigue?
Creep is low and progressive deformation of a material with time under a constant stress at high temperature applications. Fatigue is the tendency of material to offer resistance to applied stress under repeated or fluctuating loading condition.
13. What is the difference between proof resilience and modulus of resilience?
Proof resilience is the maximum strain energy that can be stored in a material without permanent deformation. Modulus of resilience is the maximum strain energy stored in a material per unit volume.
14. What is Powder Technology?
Powder technology is one of the ways of making bearing material. In this method metals like bronze, Al, Fe are mixed and compressed to make an alloy.
15. What is resilience?
The total strain energy stored in the body is generally known as resilience.
16. State the relationship between Young’s Modulus and Modulus of Rigidity.
E = 2K (1+1/m)
Where,
E - Young’s Modulus
K - Bulk Modulus
1/m - Poisson’s ratio
17. Define strain energy
whenever a body is strained, some amount of energy is absorbed in the body. The energy that is absorbed in the body due to straining effect is known as strain energy.
18. Explain the effects of alloying chromium and nickel in stainless steel.
Addition of nickel and chromium increases the tensile strength and increase in
Resistance to corrosion takes place.
19. Explain water hammer?
The force resulting from changing the speed of the water mass (say in a pipe due to sudden change of flow rate) may cause a pressure rise in the pipe with a magnitude several times greater
than the normal static pressure in the pipe. Pressure head caused by water hammer = C (V - velocity in pipe, C = celerity).
20. What is a Newtonian fluid?
A Newtonian fluid possesses a linear stress strain relationship curve and it passes through the origin. The fluid properties of a Newtonian fluid do not change when any force acts upon it.
http://www.mediafire.com/view/794j6kbvjglp6dt/2.docx
It represents the compressibility of a fluid. It is the ratio of the change in unit pressure to the corresponding volume change per unit of volume.
2. Why entropy decreases with the increase in temperature?
-ds=dQ/T Entropy is inversely proportional to the temperature so, as temp Increases, entropy decreases.
3. 1 hp how much watt?
746.2Watt
4.How to know whether the valve is inlet or exhaust by seeing the engine?
Inlet valve has more diameter than exhaust valve.
5. Give the relationship between Bulk Modulus and Young’s Modulus.
E = 3K (1-2/m) Where, E - Young’s Modulus K - Bulk Modulus 1/m - Poisson’s ratio
6. Define modulus of Rigidity.
The shear stress is directly proportional to shear strain and the constant is called modulus of rigidity.
7. What is compound bar?
A composite bar composed of two or more different materials joined together such that system is elongated or compressed in a single unit.
8. What you mean by thermal stresses?
If the body is allowed to expand or contract freely, with the rise or fall of temperature no stress is developed but if free expansion is prevented the stress developed is called temperature stress or strain.
9. What do you understand by critical points in iron, iron-carbide diagram?
The temperatures at which the phase changes occur are called critical points (or temperatures).
10. Which has more Efficiency Diesel Engine or Petrol Engine?
Diesel engine has the better efficiency out of two.
11. What is Difference between stamina and strength?
Strength is capability over a short length of time and Stamina is the ability to keep going continuously.
12. Distinguish between creep and fatigue?
Creep is low and progressive deformation of a material with time under a constant stress at high temperature applications. Fatigue is the tendency of material to offer resistance to applied stress under repeated or fluctuating loading condition.
13. What is the difference between proof resilience and modulus of resilience?
Proof resilience is the maximum strain energy that can be stored in a material without permanent deformation. Modulus of resilience is the maximum strain energy stored in a material per unit volume.
14. What is Powder Technology?
Powder technology is one of the ways of making bearing material. In this method metals like bronze, Al, Fe are mixed and compressed to make an alloy.
15. What is resilience?
The total strain energy stored in the body is generally known as resilience.
16. State the relationship between Young’s Modulus and Modulus of Rigidity.
E = 2K (1+1/m)
Where,
E - Young’s Modulus
K - Bulk Modulus
1/m - Poisson’s ratio
17. Define strain energy
whenever a body is strained, some amount of energy is absorbed in the body. The energy that is absorbed in the body due to straining effect is known as strain energy.
18. Explain the effects of alloying chromium and nickel in stainless steel.
Addition of nickel and chromium increases the tensile strength and increase in
Resistance to corrosion takes place.
19. Explain water hammer?
The force resulting from changing the speed of the water mass (say in a pipe due to sudden change of flow rate) may cause a pressure rise in the pipe with a magnitude several times greater
than the normal static pressure in the pipe. Pressure head caused by water hammer = C (V - velocity in pipe, C = celerity).
20. What is a Newtonian fluid?
A Newtonian fluid possesses a linear stress strain relationship curve and it passes through the origin. The fluid properties of a Newtonian fluid do not change when any force acts upon it.
http://www.mediafire.com/view/794j6kbvjglp6dt/2.docx
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