Question: Select the correct statement from the following?

• 1. The frequency response of a pure capacity process is unbounded
• 2. The phase lag of a pure time delay system decreases with increasing frequency
• 3. The amplitude ratio of a pure capacity process is inversely proportional to frequency
• 4. The amplitude ratio of a pure time delay system increases with frequency

Question: Pick out the first order system from among the following ?

• 1. Damped vibrator
• 2. Mercury in glass thermometer kept in boiling water
• 3. Interacting system of two tanks in series
• 4. Non-interacting system of two tanks in series

Question: Diameter of the sieve tray column is determined by the_________________?

• 1. Lower limit of vapour velocity
• 2. Upper limit of the vapour velocity
• 3. Hole diameter of the sieve tray
• 4. Height of the plate spacing

Question: Le/D) for 90° elbow (medium radius) and 90°square elbow would be respectively around___________________?

• 1. 25 and 60
• 2. 3 and 5
• 3. 100 and 250
• 4. 250 and 600

Question: Maximum plate efficiency is achieved in case of ______________ flow?

• 1. Split
• 2. Cross
• 3. Cascade
• 4. Reverse

Question: Tubes are fixed to the tube sheet (a thick circular metallic plate) by the method of tube rolling and brazing (non-removable) or ferrule connection (removable). Thickness of the tube, sheet is normally ____________ the outside diameter of the tube but in

• 1. Half
• 2. Three fourth
• 3. Equal to
• 4. 1.5 times

Question: In a multiple effect evaporator system having ‘n’ effects, the amount of water evaporated per unit surface area in approximately equal to _____________ times that in a single effect?

• 1. nth
• 2. (1/n)th
• 3. 0.5 nth
• 4. 1.5 nth

Question: Slope of counter-current flow rotary drier is in the range of ____________ meter/metre?

• 1. 0 to 0.08
• 2. 0 to 0.8
• 3. 0 to 1.5
• 4. 0 to 2.2

Question: (Le/D) for couplings and unions would be_______________?

• 1. 60
• 2. 200
• 3. 350
• 4. Negligible

Question: A shell may by termed as thin if its thickness to diameter ratio is less than 0.1. The factor which can be neglected in the calculation of membrane stresses is________________?

• 1. Bending
• 2. Deformation
• 3. Shear
• 4. Elongation