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- Question
Two shafts 'A' and 'B' are made of same material. The shaft 'A' is of diameter D and shaft 'B' is of diameter D/2. The strength of shaft 'B' is __________ as that of shaft 'A'
Options- A. one-eighth
- B. one-fourth
- C. one-half
- D. four times
- Correct Answer
- one-eighth
- 1. The moment of a force
Options- A. is the turning effect produced by a force, on the body, on which it acts
- B. is equal to the product of force acting on the body and the perpendicular distance of a point and the line of action of the force
- C. is equal to twice the area of the traingle, whose base is the line representing the force and whose vertex is the point, about which the moment is taken
- D. all of the above Discuss
- 2. When a body is subjected to a direct tensile stress (?) in one plane, then tangential or shear stress on an oblique section of the body inclined at an angle ? to the normal of the section is
Options- A. ? sin 2?
- B. ? cos 2?
- C. ?/2 sin 2?
- D. ?/2 cos 2? Discuss
- 3. Which of the following bladings will give maximum pressure rise in a centrifugal compressor, assuming the same overall dimensions, blade inlet angle and rotational speeds?
Options- A. Forward curved blades
- B. Backward curved blades
- C. Radial blades
- D. all of these Discuss
- 4. PERT requires
Options- A. single time estimate
- B. double time estimate
- C. triple time estimate
- D. none of these Discuss
- 5. A body will begin to move down an inclined plane if the angle of inclination of the plane is __________ the angle of friction.
Options- A. equal to
- B. less than
- C. greater than Discuss
- 6. The effect of bleeding is that
Options- A. it increases the thermodynamic efficiency of the turbine
- B. boiler is supplied with hot water
- C. it decreases the power developed by the turbine
- D. all of the above Discuss
- 7. The maximum number of jets, generally, employed in an impulse turbine without jet interference are
Options- A. two
- B. four
- C. six
- D. eight Discuss
- 8. Green sand is a mixture of
Options- A. 30% sand and 70% clay
- B. 50% sand and 50% clay
- C. 70% sand and 30% clay
- D. 90% sand and 10% clay Discuss
- 9. The actual feed in centreless grinders is given by (where d = Dia. of regulating wheel, n = Revolutions per minute, and ? = Angle of inclination of wheel)
Options- A. ?d
- B. ?d n
- C. ?d n sin ?
- D. ?d n cos ? Discuss
- 10. Ceramic cutting tools are
Options- A. made by cold pressing of aluminium oxide powder
- B. available in the form of tips
- C. brittle and have low bending strength
- D. all of these Discuss
More questions
Correct Answer: all of the above
Correct Answer: ?/2 sin 2?
Correct Answer: Forward curved blades
Correct Answer: triple time estimate
Correct Answer: greater than
Correct Answer: all of the above
Correct Answer: six
Correct Answer: 70% sand and 30% clay
Correct Answer: ?d n sin ?
Correct Answer: all of these
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