Discussion
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- Question
The total pressure exerted by the mixture of air and water vapour is equal to the sum of pressures which each constituent would exert, if it occupied the same space by itself. This statement is called
Options- A. Kinetic theory of gases
- B. Newton's law of gases
- C. Dalton's law of partial pressures
- D. Avogadro's hypothesis
- Correct Answer
- Dalton's law of partial pressures
- 1. The work or surface speed for cylindrical grinding varies from
Options- A. 5 to 10 m/min
- B. 10 to 20 m/min
- C. 20 to 30 m/min
- D. 40 to 60 m/min Discuss
- 2. Ultra-sonic machining is best suited for
Options- A. tool steels
- B. sintered carbides
- C. glass
- D. all of these Discuss
- 3. In a plain milling cutter, the chip space between the back of one tooth and the face of the next tooth is called
Options- A. face
- B. fillet
- C. gash
- D. land Discuss
- 4. The silicon carbide abrasive is chiefly used for grinding
Options- A. cemented carbide
- B. ceramic
- C. cast iron
- D. all of these Discuss
- 5. Gears can be best produced on mass production by
Options- A. shaping
- B. casting
- C. forming
- D. hobbing Discuss
- 6. A thin cylindrical shell of diameter (d) length (l) and thickness (t) is subjected to an internal pressure (p). The longitudinal stress in the shell is
Options- A. pd/t
- B. pd/2t
- C. pd/4t
- D. pd/6t Discuss
- 7. The purpose of a thermostat in an engine cooling system is to
Options- A. prevent the coolant from boiling
- B. allow the engine to warm up quickly
- C. indicate the coolant temperature
- D. pressurise the system to raise the boiling point Discuss
- 8. In up milling, the thickness of chip is
Options- A. minimum at the beginning of the cut and maximum at the end of the cut
- B. maximum at the beginning of the cut and minimum at the end of the cut
- C. uniform throughout the cut
- D. none of these Discuss
- 9. In natural circulation steam boilers, the circulation of water is by convection currents which are set up during the heating of water.
Options- A. Correct
- B. Incorrect Discuss
- 10. In a coupling rod of a locomotive, each of the four pairs is a __________ pair.
Options- A. sliding
- B. turning
- C. rolling
- D. screw Discuss
More questions
Correct Answer: 20 to 30 m/min
Correct Answer: all of these
Correct Answer: gash
Correct Answer: all of these
Correct Answer: hobbing
Correct Answer: pd/4t
Correct Answer: allow the engine to warm up quickly
Correct Answer: minimum at the beginning of the cut and maximum at the end of the cut
Correct Answer: Correct
Correct Answer: turning
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