In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is ______________ °C?

Related Mcqs:

Which of the following is used to produce draught in the locomotive boilers ?

A. Chimney B. Induced draught fan C. Forced draught fan D. Steam jet arrangement...

Stresses encountered in the metal forming processes are less than the _____________ of the material?

A. Fracture strength B. Yield strength C. Elastic limit D. Limit of proportionality...

The majority charge carriers in p-type silicon are______________________?

A. Free electrons B. Ions C. Conduction electrons D. Holes...

Fahrenheit and Centigrade scales have the same readings at _____________________?

A. -55° B. -40° C. -33° D. -58°...

As the fluid flow rate increases, the float of the Rotameter____________________?

A. Rises in the tube B. Rotates at higher speed C. Rotates at lower speed D. Drops down in the tube...