Question: Oxidation of ammonia is________________?

• 1. Exothermic
• 2. Endothermic
• 3. Non-catalytic
• 4. Autocatalytic

Question: Pick out the wrong statement?

• 1. All the nitrogenous fertilisers are not soluble in water
• 2. A straight fertiliser contains only one nutrient
• 3. Calcium cyanamide is used as weed killer in onion fields
• 4. The phosphorous nutrient makes the plant stem stronger and increases its branches

Question: Air vessel provided in a reciprocating pump is for__________________?

• 1. Increasing the acceleration head
• 2. Making the friction in pipe uniform
• 3. Decreasing the acceleration head
• 4. None of these

Question: For water, when the pressure increases, the viscosity_________________?

• 1. Also increases
• 2. Decreases
• 3. Remain constant
• 4. First decreases, and then increases

Question: Foot valve provided in the pump is a ______________ valve?

• 1. Direction control
• 2. Back pressure
• 3. Relief
• 4. Pressure reduction

Question: For the production of very high vacuum, a _____________ pump is normally used?

• 1. Diffusion
• 2. Centrifugal
• 3. Jet ejector
• 4. Piston

Question: Bernoulli’s equation is dependent on the__________________?

• 1. First law of thermodynamics
• 2. Third law of thermodynamics
• 3. Law of conservation of momentum
• 4. None of these

Question: Which of the following produces maximum pressure difference for transportation of gases ?

• 1. Vacuum pumps
• 2. Blowers
• 3. Fans
• 4. Compressors

Question: Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water column in case of mercury-water, differential manometer is equal to

• 1. H
• 2. 12.6 H
• 3. 13.6 H
• 4. 14.6 H

Question: The head loss in turbulent flow in a pipe varies_________________?

• 1. Directly as the velocity
• 2. Inversely as the square of the velocity
• 3. Approximately as the square of the velocity
• 4. Inversely as the square of the diameter