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- Question
When a circular bar tapering uniformly from diameter d1, at one end to diameter d2 at the other end, is subjected to an increase in temperature (t), then the thermal stress induced is (where ? = Coefficient of linear expansion, and E = Modulus of elasticity for the bar material)
Options- A.
- B.
- C.
- D.
- Correct Answer
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- 1. Tungsten when added to steel __________ the critical temperature.
Options- A. does not effect
- B. lowers
- C. raises Discuss
- 2. The unit of surface tension is
Options- A. N/m
- B. N/m2
- C. N/m3
- D. N-m Discuss
- 3. When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the other, the pair formed is known as a
Options- A. lower pair
- B. higher pair
- C. self-closed pair
- D. force-closed pair Discuss
- 4. The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which
Options- A. delivers unit discharge under unit head
- B. delivers unit discharge under unit speed
- C. develops unit power under unit head
- D. develops unit power under unit speed Discuss
- 5. The torsional rigidity of a shaft is expressed by the torque required to produce a twist of one radian per unit length of a shaft.
Options- A. True
- B. False Discuss
- 6. Metal patterns are used for
Options- A. small castings
- B. large castings
- C. complicated castings
- D. large scale production of castings Discuss
- 7. Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal?
Options- A. Silicon
- B. Sulphur
- C. Manganese
- D. Phosphorus Discuss
- 8. When the axes of the shafts, over which the gears are mounted, move relative to a fixed axis, then the train is known as reverted gear train.
Options- A. Right
- B. Wrong Discuss
- 9. A beam of T-section is subjected to a shear force of F. The maximum shear force will occur at the
Options- A. top of the section
- B. bottom of the section
- C. neutral axis of the section
- D. junction of web and flange Discuss
- 10. Bernoulli's equation is applied to
Options- A. venturimeter
- B. orifice meter
- C. pitot tube
- D. all of these Discuss
More questions
Correct Answer: raises
Correct Answer: N/m
Correct Answer: lower pair
Correct Answer: develops unit power under unit head
Correct Answer: True
Correct Answer: large scale production of castings
Correct Answer: Silicon
Correct Answer: Wrong
Correct Answer: neutral axis of the section
Correct Answer: all of these
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