Quiz VI and VII

What is the most common type of pump used in the process industries?

• Gear pump

• Diaphragm

• Centrifugal pump

• Reciprocating pump

What is the main difference between reciprocating pumps and centrifugal pumps?

• Reciprocating pumps impart pressure in pulses, while centrifugal pumps provide a steady flow

• Reciprocating pumps reach higher pressures than centrifugal pumps

• Reciprocating pumps are used for gases, while centrifugal pumps are used for liquids

• Reciprocating pumps are more energy-efficient than centrifugal pumps

What is the purpose of a throttling valve in a piping system?

• To fully open or fully close the flow of liquids

• To control the temperature of the liquids

• To prevent leaks in the pipeline

• To change the rate of flow of liquids

What is the main disadvantage of using globe valves for on/off service?

• They are less durable than gate valves

• They are difficult to install in a piping system

• They waste energy due to swirls and eddies in the liquid stream

• They cause pressure drops in the pipeline

What is the function of a reciprocating compressor?

• To pressurize liquids

• To move solids in a pipeline

• To reach pressures far higher than those achieved by centrifugal pumps

• To provide a steady flow of gases

What is the primary purpose of a gate valve in a piping system?

• To prevent leaks in the pipeline

• To control the quantity of liquid flowing in a pipe

• To pressurize gases

• To change the temperature of the liquids

What is the role of fans in pressurizing gases in a pipeline?

• To move solids in the pipeline

• To decrease the pressure of the gases

• To increase the pressure of the gases

• To increase the temperature of the gases

Why are reciprocating pumps commonly used for metering liquids?

• Because they are more energy-efficient than centrifugal pumps

• Because they can easily reach high pressures

• Because each stroke of the piston displaces the same volume of liquid

• Because they are more durable than gate valves

What is the main advantage of using centrifugal pumps in process plants?

• They provide a steady flow without pulsation of pressure

• They are easier to install in a piping system

• They can handle large pieces of solid material in liquids

• They are more energy-efficient than reciprocating pumps

Why are gate valves preferred for on/off service in a piping system?

• Because they are more energy-efficient than globe valve

• Because they are easier to install in a piping system

• Because they prevent wear from liquid flow when in the open position

• Because they can be used for throttling service without damage