Related Questions

স্লাইডে ছবি যুক্ত করার জন্য-i. Insert মেনুর রিবনে picture আইকন click করতে হবেii. Insert picture বক্স থেকে ছবি সংযোগ করতে হবেii. Picture রেডিও বোতাম সক্রিয় করতে হবেনিচের কোনটি সঠিক?
A i ও ii
B i ও iii
C ii ও iii
D i, ii ও iii
The phrase "to fight neck to neck " is closest in meaning to.
A to fight back
B to fight one sidely
C to fight equally
D to fight randomly
In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones ; because the smaller diameter tubes
A Are easier to clean
B Are less prone to fouling
C Can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less
D None of these
For the same heat load and mass flow rate in the tube side of a shell and tube heat exchanger, one may use multipass on the tube side, because it
A Decreases the pressure drop
B Decreases the outlet temperature of cooling medium
C Increases the overall heat transfer coefficient
D None of these
The rectangular beam 'A' has length ‘l’, width ‘b’ and depth ‘d’. Another beam 'B' has the same length and depth but width is double that of 'A'. The elastic strength of beam 'B' will be _________ as compared to beam ‘A’.
A Same
B Double
C Four times
D Six times
A simply supported beam 'A' of length l, breadth b, and depth d carries a central point load W. Another beam 'B' has the same length and depth but its breadth is doubled. The deflection of beam 'B' will be __________ as compared to beam 'A'.
A One-fourth
B One-half
C Double
D Four times
The rectangular beam 'A ' has length l, width b and depth d. Another beam 'B' has the same width and depth but length is double that of 'A'. The elastic strength of beam 'B' will be __________ as compared to beam A.
A Same
B One-half
C One-fourth
D One-eighth
The rectangular beam 'A' has length l, width b and depth d. Another beam 'B' has the same length and width but depth is double that of 'A'. The elastic strength of beam B will be __________ as compared to beam A.
A Same
B Double
C Four times
D Six times
In a color television set using a picture tube a high voltage is used to accelerate electron beams to light the screen. That voltage is about?
A 500 volts
B 5 thousand volts
C 25 thousand volts
D 100 thousand volts
Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is
A Finned tube heat exchanger with air inside and steam outside
B Finned tube heat exchanger with air outside and steam inside
C Shell and tube heat exchanger with air inside tubes and steam on shell side
D Shell and tube heat exchanger with air on shell side and steam inside tubes

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