Bangladesh steel & engineering corporation (BSEC) Exam question

Bangladesh steel & engineering corporation (BSEC)

Department: mechanical

mark-75,time-90 minutes

place-Dhanmondi Govt. School, Dhaka

1. Differentiate between impulse and reaction turbine. What is staging in turbine ?

2. What is draft tube in hydraulic turbine ?

3. Draw the block diagram of Vapor compression refrigeration system and the P-V ,

    T-S diagram.

4. What are the characteristics of good refrigerant ? Why sub-cooling is necessary in refrigeration           system.

5. Write down the major and minor losses in pumping system.

6. Write down the second law of thermodynamics with practical examples

7. Differentiate between CI and SI Engine.

8. Why flywheel is used in IC engines ?

9. A block 30 m by 30 m weighing 80 kg. The friction of Co-efficient from the block and earth is            0.27. Fing out the embedding force.

10. Front,Top and Right hand side view of Isometric view.

11. Write the Significant of the historical speech on March 7, 1971 by Bangbundhu.

12. Ekti Khamar Ekti Bari prokalpo Reducing the poverty through female involvement- comments

13. Mechineries used inh Argicaltural increasing the unemployement in rural area-comments

14. Vocational education impact on economic- comments

15. Differentiate-

• Newton's Law & Daltons law
• Physical change & Chemical change
• Production & Manufacturing
• Speed & velocity
• acceleration & retardation