Biman Bangladesh Airlines ltd. Question & Solution(13th July 2018)

Biman Bangladesh Airlines ltd. (13th July 2018)

Questions

MCQ:

1. CAAB- founder 1985

2. ICAO - International Civil Aviation Organization

3. Caan festivals 2018 award- Plame d’Or winner : Shoplifters

4. 2018 FIFA world cup football name- Telstar 2018

5. Writer of “ The Old man & The sea” Ernest Hemingway

6. Present UN president is from which country :  Portugal

7. Many computers are connected to a common computer : Star technology

8. USB : Universal Serial Bus

9. What kind of device is scanner : Input Device

10. Primary function of BIOS : Save OS

11. 2, 3,5,7 are : prime numbers

12. product of two consecutive number can be written as:  n²+n

13.  can be also expressed as :

14. 4^x+1= 32, then find x ? x= 3/2

Departmental Question:

1. A 4 cylinder petrol engine has developed MEP=650 KPa, it's engine dia is 80 mm, stroke length is 100 mm, speed 3000 rpm. Find engine power in KW ?

2. For counter flow heat exchanger T_h1=160℃, T_h2=125℃, T_c1=20℃, T_c2=80℃ , Draw temperature distribution curve. Also Find arithmetic mean temperature difference & logarithmic mean temperature difference.

3. A wire has got dia of 20 mm, if heat transfer co efficient is 20 W/m².K and thermal Conductivity is 0.5W/m.k. then find the distance at which maximum heat dissipation will occur.

4. A 1.5m×1.5m×2m tank is kept at 11m above from the ground. If a pump installed on ground having efficiency of 60% can fill the tank in 30 min then , find the required pump power.

5. Show that , specific speed of pump is a dimensionless number.

6. Draw P-V & T-S diagram of otto & diesel cycle and write down the corresponding process name.

7. Find the absolute pressure in Pa of 100mm mercury vacuum pressure

8. Engine power developed 40KW, solid shafts rpm 200 , if the shaft dia is 40 mm then find maximum torsional stress developer in the shaft.

9. Find the deflection of a solid circular steel bar having load 500 kg, lenght 2.5 m, dia 60mm & E=200 GPa

10. Draw block diagram & T-S diagram for gas- steam combine cycle power plant.

11. A 60 mm metal ball at 220℃ is being cooled by air jet of 20℃, heat transfer co-efficient 200 W/m.k & 100 W/m².K, if the specific heat of the metal ball 400 J/Kg.K, density 9000Kg/m³, find the temperature of the ball after 90 sec.

12. An aeroplane makes a complete half circle of 50 metres radius, towards left,when flying at 200 km per hr. The rotary engine and the propeller of the plane has a mass of 400 kg and a radius of gyration of 0.3 m. The engine rotates at 2400 r.p.m. clockwise when viewed from the

rear. Find the gyroscopic couple on the aircraft.

13. In a vapor compression refrigeration cycle inlet condenser enthalpy is 283 KJ/Kg, exit condenser enthalpy is 116 KJ/Kg, exit evaporator enthalpy is 232 KJ/Kg, Find COP.

14. Draw all necessary orthrogrphic views of the following objects.

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