Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type

A. Parallel flow with equal heat capacities
B. Counter flow with equal heat capacities
C. Counter flow with unequal heat capacities
D. Parallel flow with unequal heat capacities
✅ The correct answer is option B.

In chemical dehumidification of air

A. Both specific humidity & dry bulb temperature increases
B. Both specific humidity & dry bulb temperature decreases
C. Specific humidity decreases & dry bulb temperature increases
D. Specific humidity increases & dry bulb temperature decreases
✅ The correct answer is option C.