Question: The average velocity in the tubes of a 1-4 heat exchanger is ______________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate ?

• 1. 2
• 2. 1/2
• 3. 4
• 4. 1/4

Question: _____________ heat exchanger is also known as ‘hair pin type’ exchanger?

• 1. Double pipe
• 2. Finned
• 3. Plate type
• 4. Regenerative

Question: Minimum tube pitch recommended for shell and tube heat exchangers is about _______________ times the outside diameter of the tube?

• 1. 1.25
• 2. 1.75
• 3. 2.5
• 4. 3.5

Question: Which of the following efficiencies can be greater than 100% ?

• 1. Overall plate efficiency
• 2. Murphree plate efficiency
• 3. Point efficiency
• 4. None of these

Question: Angled baffles are preferred in the agitation tank to control the swirling action; if the viscosity of the liquid to be mixed is about 200 poise. However, the baffle may be completely eliminated for mixing liquids having viscosity above __________________

• 1. 300
• 2. 600
• 3. 1000
• 4. 1500

Question: What is the slope of the operating line in the rectifying section of a distillation column ?

• 1. 0
• 2. ∞
• 3. > 1
• 4. <1

Question: The ratio of lateral strain to linear strain is termed as the___________________?

• 1. Poisson’s ratio
• 2. Bulk modulus
• 3. Modulus of elasticity
• 4. Shear modulus

Question: Normal screwed fittings are used for pipes upto a diameter of _______________ inches?

• 1. 1.5
• 2. 3
• 3. 5
• 4. 9

Question: The ratio, (propeller agitator dia/tank dia) is normally taken as____________________?

• 1. 0.15-030
• 2. 0.5-0.65
• 3. 0.75-0.85
• 4. 0.60-0.90

Question: Tube height in a calandria type evaporator is normally less than _______________ metres?

• 1. 1
• 2. 2
• 3. 3.5
• 4. 5.5