Question: Cavitation is caused by___________________?

• 1. high velocity
• 2. high pressure
• 3. weak material
• 4. low pressure

Question: Bernoulli equation deals with the law of conservation of____________________?

• 1. mass
• 2. momentum
• 3. energy
• 4. work

Question: A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal tc__________________?

• 1. 10 kg
• 2. 100 kg
• 3. 1000 kg
• 4. 1 kg

Question: For pipes, turbulent flow occurs when Reynolds number is_________________?

• 1. less than 2000
• 2. between 2000 and 4000
• 3. more than 4000
• 4. less than 4000

Question: The pressure in Pascals at a depth of 1 m below the free surface of a body of water will be equal to________________?

• 1. 1 Pa
• 2. 91Pa
• 3. 981 Pa
• 4. 9810 Pa

Question: In order that flow takes place between two points in a pipeline, the differential pressure between thes^ points must be more than_________________?

• 1. frictional force
• 2. viscosity
• 3. surface friction
• 4. all of the above

Question: A large Roynold number is indication of_________________?

• 1. smooth and streamline flow
• 2. laminar flow
• 3. steady flow
• 4. highly turbulent flow

Question: Reynolds number is significant in____________________?

• 1. supersonics, as with projectile and jet propulsion
• 2. full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc
• 3. simultaneous motion through two fluids where there is a surface of dis-continuity, gravity forces, and wave making effect, as with ship’s hulls
• 4. all of the above

Question: Froude number is significant in____________________?

• 1. supersonics, as with projectile and jet propulsion
• 2. full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.
• 3. simultaneous motion through two fluids where there is a surface of dis-continuity, gravity forces, and wave making effect, as with ship’s hulls
• 4. all of the above

Question: The equation of continuity holds good when the flow __________________?

• 1. is steady
• 2. is one dimensional
• 3. velocity is uniform at all the cross sec-tions
• 4. all of the above