JOCL AE(ME) 05.06.2018 Question & Solution

Jamuna Oil Company Ltd (JOCL) Mechanical recruitment Question & Solution 

Exam Date : 5th July 2018

Questions

MCQ:

1. Where cash memory is placed?

2. Who is the writer of “love and prejudice”?

3. if  = x , then find the value of  + 9 ?

4. বাংলাদেশ ভারতের মধ্যে পানি চুক্তি কবে সাক্ষরিত হয় ?

5. নিউক্লিয়ার পাওয়ার প্লান্টে Coolant  হিসাবে কি ব্যবহার করা হয় ?

6. মুক্তিযুদ্ধের সময় ঢাকা কত নম্বর সেক্টরে ছিল ?

7. জয়েন্ট ফোর্সের সেক্টর কমান্ডার কে ছিলেন ?

8. বঙ্গবন্ধু কবে জেল থেকে মুক্তি পান ?  

Departmental Question:

1. For the following hydraulic block diagram draw energy gradient line (EGD) & Hydraulic gradient line (HGD).

2. For pipe flow having diameter 8 cm, flow rate 15L/s, length of pipe 20 m find the flow whether it is laminar or turbulent ? f= 0.032

3. If area of a square pipe and a circular pipe is same & parameters like density of flow, velocity & viscosity if flow is same then in which pipe Reynolds number will be larger?

4. Write down the three dimensional heat transfer equation in Cartesian co-ordinates & state its boundary conditions.

5. A pressure vessel having dia 400 mm, internal pressure 50 MPa, Max. value of tangential and longitudinal stress is 140 MPa and 190 MPa, find out the thickness of the pressure vessel.

6. The bob of a 2m simple pendulum describes an arc of a circle in a vertical plane. If the tension in the cord is 2.5 times the weight of the bob for the position shown, find the velocity of the bob at this position.

7. Derive the equation for elongation of bar due to its own weight hanging vertically having length L, mass m, area A, modulus of elasticity E.

8. A parallel flow pipe heat exchanger is to heat water by ethanol of 10000 Kg/hr from 64.5 ֯C to 38.2֯C having specific heat 1905 J /Kg.K. Water at a rate of 7000 Kg/hr is heated. If water enter at 8֯C and have specific heat 4180 J/Kg.K then find out the exit temperature of water & LMTD.

9. Draw the T-s diagram of a vapor compression refrigeration cycle. Calculate COP of the bellow p-h diagram.

10. A steel pipes is under load of 2000N, length of the bar is 2m & is under maximum stress of 150MPa. For those condition maximum deflection is 30 mm, then find the required diameter.E=200GPa

11. For a belt system initial pull is 2500N, angle of smaller pulley is 150 degree, coefficient 0.25, velocity 6.5 m/s. then find the power transmitted.

12. Draw top view and front view of the following drawing.

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