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- Question
The maximum diameter of the hole that can be punched from a plate of maximum shear stress 1/4th of its maximum crushing stress of punch, is equal to (where t = Thickness of the plate)
Options- A. t
- B. 2t
- C. 4t
- D. 8t
- Correct Answer
- 4t
- 1. The expansion of steam, as it flows over the blades in reaction turbine, represents
Options- A. isothermal process
- B. isentropic process
- C. throttling process
- D. free-expansion process Discuss
- 2. The ideal angle of banking provided on the curves on roads depends upon
Options- A. weight of the vehicle
- B. (velocity)2 of the vehicle
- C. nature of the road surface
- D. coefficient of friction between the road and vehicle contact point Discuss
- 3. The velocity ratio of a simple wheel and axle with D and d as the diameters of effort wheel and load axle, is
Options- A. D + d
- B. D - d
- C. D x d
- D. D / d Discuss
- 4. The ductility of the material __________ with the decrease in percentage elongation of a specimen under tensile test.
Options- A. increases
- B. decreases
- C. remains same Discuss
- 5. The discharge through a reaction turbine __________ with the increase in unit speed.
Options- A. remains same
- B. increases
- C. decreases Discuss
- 6. Sand wash is a casting defect which
Options- A. results in a mismatching of the top and bottom parts of a casting
- B. results in general enlargement of the casting
- C. occurs near the ingates as rough lumps on the surface of a casting
- D. occurs as sand patches on the upper surface of a casting Discuss
- 7. The metal extrusion process is generally used for producing
Options- A. uniform solid sections
- B. uniform hollow sections
- C. uniform solid and hollow sections
- D. varying solid and hollow sections Discuss
- 8. The sensible heat factor during cooling and dehumidification process is given by (where h1 = Enthalpy of air entering the cooling coil, h2 = Enthalpy of air leaving the cooling coil, and hA = Enthalpy of air at the end of dehumidification process)
Options- A.
- B.
- C.
- D.
Discuss
- 9. The process used to improve fatigue resistance of the metal by setting up compressive stresses in its surface, is known as
Options- A. hot piercing
- B. extrusion
- C. cold peening
- D. cold heading Discuss
- 10. The process of adding moisture to the air, without change in its dry bulb temperature, is known as humidification.
Options- A. Agree
- B. Disagree Discuss
More questions
Correct Answer: isentropic process
Correct Answer: (velocity)2 of the vehicle
Correct Answer: D / d
Correct Answer: decreases
Correct Answer: decreases
Correct Answer: occurs near the ingates as rough lumps on the surface of a casting
Correct Answer: uniform solid and hollow sections
Correct Answer:
Correct Answer: cold peening
Correct Answer: Agree
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