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- Question
In permanent mould casting method
Options- A. molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition
- B. molten metal is poured and allowed to solidify while the mould is revolving
- C. molten metal is forced into mould under high pressure
- D. none of the above
- Correct Answer
- none of the above
- 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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