Question: Baffles are provided in heat exchangers to____________?

• 1. Remove dirt
• 2. Increase heat transfer rate
• 3. Reduce vibrations
• 4. Reduce heat transfer rate

Question: Maximum heat transfer rate can be expected in case of_________?

• 1. Laminar flow
• 2. Co-current flow
• 3. Turbulent flow
• 4. Heat flow rate is independent of nature of flow

Question: Free alkali in a toilet soap is _______________ that in a laundry shop ?

• 1. Less than
• 2. More than
• 3. Same
• 4. None of these

Question: Washing soda is chemically represented by _________________?

• 1. Na2CO3
• 2. Na2CO3.H2O
• 3. Na2CO3.10H2O
• 4. NaHCO3

Question: Absorption of SO3 in 97% H2SO4 is_______________?

• 1. Exothermic
• 2. Endothermic
• 3. Not possible
• 4. None of these

Question: Phthalic anhydride is made by the ______________________?

• 1. Oxidation of naphthalene
• 2. Oxidation of benzene
• 3. Dehydrogenation of ethyl benzene
• 4. None of these

Question: Dehydrogenation of Isopropanol produces ____________________?

• 1. Propyl alcohol
• 2. Acetone
• 3. Trichloroethylene
• 4. Formaldehyde

Question: Which of the following is a constituent of vinegar ?

• 1. Around 10% alcohol
• 2. Around 1% acetic acid
• 3. Both A and B
• 4. Neither A nor B

Question: ‘Hollander beater’ machine used in the paper manufacturing plant does not accomplish the task of____________________?

• 1. Final rolling out of paper
• 2. Cutting of fibres
• 3. Hydration of fibres
• 4. Fibrillation of fibre

Question: Oil produced by solvent extraction________________?

• 1. Has low free fatty acid content
• 2. Is odourless
• 3. Both A & B
• 4. Neither A nor B