Related Questions

In most of the shell and tube heat exchangers, the tube pitch is generally __________ the tube diameter.
A Less than
B 1.25-1.50 times
C 2.5 times
D One-fourth of
Minimum tube pitch recommended for shell and tube heat exchangers is about __________ times the outside diameter of the tube.
A 1.25
B 1.75
C 2.5
D 3.5
For the same diameter and thickness of tube, a water tube boiler has ________ heating surface as compared to fire tube boiler.
A More
B Less
C Equal
D None of these
For the same diameter and thickness of tube, a water tube boiler compared to a fire tube boiler has
A More heating surface
B Less heating surface
C Equal heating surface
D Heating surface depends on other parameters
In a shell and tube heat exchanger, the tube side heat transfer co-efficient just at the entrance of the tube is
A Infinity
B Zero
C Same as average heat transfer co-efficient for tube side
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
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
x=0 , x=4 , y =1 ও y =5 রেখাগুলো (lines ) দ্বারা আবদ্ধ (bounded) এলাকার ক্ষেত্রফল (area) কত বর্গ একক হবে?
A 20
B 24
C 15
D 16
0,2 ব্যবধিতে y=x-1 এবং y=0 রেখা দ্বারা আবদ্ধ অঞ্চলের মোট ক্ষেত্রফল কত? (What is the total area of the region bounded by the lines y = x –1 and y = 0 over the interval [0,2]?)
A ∫02(x-1)dx
B ∫02x-1dx
C 2∫12(1-x)dx
D 2∫01(x-1)dx
[0,2] ব্যবধিতে y=x-1 এবং y=0 রেখা দ্বারা আবদ্ধ অঞ্চলের মোট ক্ষেত্রফল কত? (What is the total area of the region bounded by the lines y=x-1 and y=0 over the interval [0,2]?)
A ∫02(x-1)dx
B ∫02∣x-1∣ dx
C 2∫12(x-1)dx
D 2∫01(x-1)dx

Next steps