Petrochemical Technology

1. Chemical action during corrosion converts metal into metallic component as ________

• a. hydroxide

• b. oxide

• c. sulphate

• d. all of the above

2. What is meant by corrosion?

• a. Chemical reaction between anode, cathode and electrolyte, which leads to loss of metal

• b. Deterioration of metals due to reaction with its environment

• c. Both a. and b.

• d. None of the above

3. Which type of chemical reaction is observed at cathode, in electrochemical corrosion?

• a. Oxidation reaction

• b. Peretectic reaction

• c. Reduction reaction

• d. None of the above

4. Which of the following corrosions are caused due to velocity of fluid flow in pipes?

• a. Bimetal corrosion

• b. Cavitation corrosion

• c. Galvanic corrosion

• d. Intergranular corrosion

5. Corrosion fatigue is a combined effect of _____

• a. Corrosive environment and mechanical stresses

• b. Cyclic loading and corrosion

• c. Velocity and mechanical stresses

• d. None of the above

Feeling the warm breeze from the ocean is an example of...

• conduction

• convection

• radiation

Walking without shoes on a hot day is an example of...

• Conduction

• Convection

• Radiation

The rising and sinking in fluids is called a

• Conduction

• Convection Current

• Radiation

Warm air rises and the cool air sinks demonstrates this type of heat transfer. 

• conduction
• convection
• radiation
• Insolation 

What causes the circulation of air in the atmosphere?

• Air in the atmosphere is heated by the sun and sinks to the ground.
• The ground is heated by the sun and then heats the air, causing the air to rise.
• Air loses heat to the ground and then rises upward to obtain more energy.
• The sun heats the clouds which forces the cooler air to move away and sink.