Discussion
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- Question
The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as
Options- A. Wien's law
- B. Stefan's law
- C. Kirchhoff's law
- D. Planck's law
- Correct Answer
- Kirchhoff's law
- 1. The knocking tendency in spark ignition engines can be decreased by adding dopes like tetra ethyle lead and ethylene dibromide.
Options- A. Agree
- B. Disagree Discuss
- 2. The parts of circular cross-section which are symmetrical about the axis of rotation are made by
Options- A. hot forging
- B. hot spinning
- C. hot extrusion
- D. hot drawing Discuss
- 3. The principle of transmissibility of forces states that, when a force acts upon a body, its effect is
Options- A. same at every point on its line of action
- B. different at different points on its line of action
- C. minimum, if it acts at the centre of gravity of the body
- D. maximum, if it acts at the centre of gravity of the body Discuss
- 4. The section modulus of a circular section about an axis through its C.G., is
Options- A. ?d2/4
- B. ?d2/16
- C. ?d3/16
- D. ?d3/32 Discuss
- 5. In oblique cutting system, the cutting edge of the tool
Options- A. may clear the width of the workpiece
- B. may or may not clear the width of the workpiece
- C. may not clear the width of the workpiece
- D. should always clear the width of the workpiece Discuss
- 6. The device for smoothening out the power impulses from the engine is called
Options- A. clutch
- B. differential
- C. flywheel
- D. torque converter Discuss
- 7. Reynolds number (RN) is given by (where h = Film coefficient, l = Linear dimension, V = Velocity of fluid, k = Thermal conductivity, t = Temperature, ? = Density of fluid, cp = Specific heat at constant pressure, and ? = Coefficient of absolute viscosity)
Options- A.
- B.
- C.
- D.
Discuss
- 8. The forced-fed lubrication system means that the oil is delivered to the engine by
Options- A. gravity
- B. the pressure created by the oil pump
- C. splashing action of the crankshaft
- D. none of these Discuss
- 9. All the steel trusses of the bridges, have one of their end roller supported, and other end hinged. The main advantage of such a support is that the truss remains stable.
Options- A. True
- B. False Discuss
- 10. Free convection flow depends on
Options- A. density
- B. coefficient of viscosity
- C. gravitational force
- D. all of these Discuss
More questions
Correct Answer: Agree
Correct Answer: hot spinning
Correct Answer: minimum, if it acts at the centre of gravity of the body
Correct Answer: ?d3/32
Correct Answer: may not clear the width of the workpiece
Correct Answer: flywheel
Correct Answer:
Correct Answer: the pressure created by the oil pump
Correct Answer: True
Correct Answer: all of these
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