Related Questions

The scales form in heat exchanges after a period of operation and provide additional resistance to heat transfer with some heat transfer coefficient . The reciprocal of this scale heat transfer coefficient is called .
A scaling factor
B forming factor
C resisting factor
D fouling factor
Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the
A Surrounding temperature
B Average temperature of the fin
C Temperature of the fin end
D Constant temperature equal to that of the base
Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity?
A CO2
B N2
C O2
D CO
For shell and tube heat exchanger, with increasing heat transfer area, the purchased cost per unit heat transfer area
A Increases
B Decreases
C Remains constant
D Passes through a maxima
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
If b equals 20% of b, then which one of the following equals 30% of c?
A 0.0006% of a
B 0.006% of a
C 0.06% of a
D 0.6% of a
a, b and c are positive integers. If b equals the square root of a, and if c equals the sum of a and b, which of the following could be the value of e?
A 21
B 30
C 45
D 331
2a equals 10 and--------a equals 5?
A eventually
B thus
C therefore
D thereby
16% of s equals t. 10% of t equals 40. What is the value of s-t?
A 24.00
B 21.00
C 30.00
D 22.00
If 25% of A equals 30% sof B and 24% of B equals 20% of C what is the ration of A to C?
A 1 :1
B 1 : 2
C 2 :1
D 4 : 3

Next steps