1. What is thermodynamics?
Thermodynamics is the science of energy transfer which deals with the relations among heat, work and properties of systems.
2. What is unavailable energy?
Unavailable energy which is usually rejected as waste in the sink.
3. What are Point functions in thermodynamics?
Points functions are those for which the change depends on only the end states and not on the path followed. Hence point functions are inexact differentials.
4. What are Path functions in thermodynamics?
Path functions are those for which the change depends not only on the end states but also on the path followed. Hence path functions are exact differentials.
5. When a system is said to be in thermodynamic equilibrium?
A system is said to be in thermodynamic equilibrium if it maintains thermal, mechanical and chemical equilibrium.
6. What is the difference between threading and tapping?
A threading operation is performed on a turning machine and produces an external thread,
While tapping is normally performed on a drilling machine and produces an internal thread.
7. What is the difference between brazing and soldering?
In brazing the filler metal melts at a temperature above 450°C (840°F).
In soldering the filler metal melts at a temperature of 450°C or below.
8. What is specific weight?
Specific Weight is defined as the weight per unit volume.
Weight per unit volume = mass per unit volume *g
9. What is turbulent flow?
In turbulent flow fluid layers mix macroscopically and the velocity/temperature/mass concentration at any point is found to vary with reference to a mean value over a time period.
10. What is circulation in context of fluid mechanic?
Circulation is defined as the line integral of velocity about this closed path.
11. What is vorticity?
Vorticity is defined as circulation per unit area.
12. What are inversions of the mechanisms?
The process of obtaining different-different mechanisms by fixing different links in a kinematic chain is known as inversion of the mechanism.
13. What is Dynamic friction?
The friction experienced by the body when the body is in motion. The dynamic friction is also called kinetic friction and is less than the static friction.
14. What abrasive material would one select for grinding a cemented carbide cutting tool?
A diamond wheel
15. What is Grain boundary?
A surface defect representing the boundary between two grains. The crystal has a different orientation on either side of the grain boundary.
16. What do you understand by theory of machines?
The subject Theory of Machines may be defined as that branch of Engineering-science, which deals with the study of relative motion between the various parts of a machine, and forces which act on them.
17. What is Dynamic?
It is that branch of Theory of Machines which deals with the forces and their effects, while acting upon the machine parts in motion
18. What is Strain?
It is the elongation per unit length of the material.
19. What is true strain?
Elongation per unit length calculated using the instantaneous dimensions.
20. What is non-steady flow of fluid?
If at any point in the fluid, the flow characteristics change with time, the flow is described as unsteady.
Thermodynamics is the science of energy transfer which deals with the relations among heat, work and properties of systems.
2. What is unavailable energy?
Unavailable energy which is usually rejected as waste in the sink.
3. What are Point functions in thermodynamics?
Points functions are those for which the change depends on only the end states and not on the path followed. Hence point functions are inexact differentials.
4. What are Path functions in thermodynamics?
Path functions are those for which the change depends not only on the end states but also on the path followed. Hence path functions are exact differentials.
5. When a system is said to be in thermodynamic equilibrium?
A system is said to be in thermodynamic equilibrium if it maintains thermal, mechanical and chemical equilibrium.
6. What is the difference between threading and tapping?
A threading operation is performed on a turning machine and produces an external thread,
While tapping is normally performed on a drilling machine and produces an internal thread.
7. What is the difference between brazing and soldering?
In brazing the filler metal melts at a temperature above 450°C (840°F).
In soldering the filler metal melts at a temperature of 450°C or below.
8. What is specific weight?
Specific Weight is defined as the weight per unit volume.
Weight per unit volume = mass per unit volume *g
9. What is turbulent flow?
In turbulent flow fluid layers mix macroscopically and the velocity/temperature/mass concentration at any point is found to vary with reference to a mean value over a time period.
10. What is circulation in context of fluid mechanic?
Circulation is defined as the line integral of velocity about this closed path.
11. What is vorticity?
Vorticity is defined as circulation per unit area.
12. What are inversions of the mechanisms?
The process of obtaining different-different mechanisms by fixing different links in a kinematic chain is known as inversion of the mechanism.
13. What is Dynamic friction?
The friction experienced by the body when the body is in motion. The dynamic friction is also called kinetic friction and is less than the static friction.
14. What abrasive material would one select for grinding a cemented carbide cutting tool?
A diamond wheel
15. What is Grain boundary?
A surface defect representing the boundary between two grains. The crystal has a different orientation on either side of the grain boundary.
16. What do you understand by theory of machines?
The subject Theory of Machines may be defined as that branch of Engineering-science, which deals with the study of relative motion between the various parts of a machine, and forces which act on them.
17. What is Dynamic?
It is that branch of Theory of Machines which deals with the forces and their effects, while acting upon the machine parts in motion
18. What is Strain?
It is the elongation per unit length of the material.
19. What is true strain?
Elongation per unit length calculated using the instantaneous dimensions.
20. What is non-steady flow of fluid?
If at any point in the fluid, the flow characteristics change with time, the flow is described as unsteady.
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