A. Called tube pitch
B. Called tube clearance
C. More in case of triangular pitch as compared to square pitch of tube layout
D. None of these
Related Mcqs:
- In a shell and tube heat exchanger, the shortest centre to centre distance between the adjacent tubes is__________________?
A. Called tube pitch
B. Called tube clearance
C. Always less than the diameter of the tube
D. None of these - Tube side pressure drop in a 1-2 heat exchanger (for turbulent flow of fluids through the tubes) is about __________ times, that in a 1-1 heat exchanger having the same size & number of tubes and operated at the same liquid flow rate ?
A. 2
B. ½
C. 4
D. 8 - 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 - The average velocity in the tubes of a 1-4 heat exchanger is ______________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate ?
A. 2
B. 1/2
C. 4
D. 1/4 - The clearance between two tubes in a shell and tube heat exchanger is known as ‘ligament’, whose minimum value is _____________ the outside diameter of the tube, but in no case it should be less than 4.5 mm?
A. Equal to
B. Half
C. One fourth
D. Three fourth - For storing hazardous chemicals in large storage tanks, the minimum safe distance between the two tanks should range between ______________________ times the tank diameter?
A. 1 to 1.5
B. 2.5 to 3.5
C. 4 to 5
D. 6 to 8 - Tube wall thickness depends on the corrosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than _____________ mm outside diameter is generally not recommended for fouling fluids ?
A. 16
B. 19
C. 28
D. 38 - Removable connection of tubes to tube sheet is called___________________?
A. Ferrule
B. Socket
C. Nipple
D. Saddle - For given number of passes, pitch & tube diameter, the maximum number of tubes that can be accommodated in a shell of tripled inside diameter will be ____________ times?
A. About 9
B. Considerably more than 9
C. Considerably less than 9
D. About 3 - In case of 1.5″ heat exchanger tubes, the inside flow area _____________ with decrease in BWG?
A. Increases
B. Decreases
C. Remains same
D. None of these
