BHEL Model Questions 1

1.      Unit of Entropy (J/kg K or kJ/kg K)?

2.      A mass of 100kg is falling from a height of 1 m and penetrates the sand into for 1 m. What is the resistance force given by sand?

3.      Ratio of specific heats of air? (1.41)

4.      A body weighs 3 kg in air. If it is submerged in a liquid, it weighs 2.5 kg. What is the specific gravity of the liquid?

5.      Two cars travel in same direction at 40 km/hr. at a regular distance. A car comes in an opposite direction in 60km/hr. It meets each car in a gap of 8 seconds. What is the distance between them?

6.      A simple problem involving in hoops stress. For sphere: M= [3/2]*p*V* [density of pressure vessel material/Maximum working stress it can tolerate] For Thin walled pressure walls: Hoops stress or stress in the radial direction =p*r/2t?

7.      A problem in force calculation in a body moving in an inclined surface?

8.      Composition of bronze?
Ans. Copper+zinc.

9.      Composition of stainless steel?
Ans. iron+chromium+nickel+carbon.

10.  CI is manufactured in which process?
Ans. Cupola process