63.

64.

65.

66.

67.

68.

69.

Transfer function of PD control is (K, is gain, 7p is derivative time and 7, is integral time) :

P(s) _ ൧൭ 1
(A) as) =K,(1+Tps) (B) नल = ۴+ 775 + =]
(൫ ൧൭൧ 0) ൧7൭൧

೮5) 7 (1 + 705) ೮5) 7 (1 + 705 + 715)

Error detector is absent in :
(^) Feed back systems (B) Open loop systems
(C) Closed loop systems (D) All the above

If the temperature of the atmosphere increases at constant absolute humidity, the percentage

saturation would be :
(A) Increase (B) Remain constant

(C) Decrease (D) First increase and then decrease

For a two phase feed, where 80% of the feed is vaporized under column condition, the feed

line slope in the Mc Cabe-Thiele method for distillation column is :
(A) -1/4 (B) 1/4
© 4 60) -4

At 750 K and 1 atm, the approximate value of the Schmidt number for air is :
(A) 0.01 (B) 10
(0) 0.1 (D) 1

The absorption factor is defined as :
(A) LimG ൯ ക്ഷി.
(0) mL/G ൬) 10೮/೫

Simultaneous heat and mass transfer are occurring in a fluid over a flat plate. The flow is
laminar. The concentration boundary layer will coincide with the thermal boundary layer,
when :

(A) Sc=Nu (B) Sh=Nu

(C) Sh=Pr (D) Sc=Pr

121/2022 14 A