Heat Exchanger Practice Quiz

Question 1

In a split backing ring floating head heat exchanger, what part is bolted to the split backing ring?

Answer 1

Floating head cover

Question 2

If the channel head of a fix tube heat exchanger has two baffles and the rear head has one baffle, how many passes would the tube side have?

Answer 2

4

Question 3

How many longitudinal shell side baffles are required to get achieve four passes on the shell side of an exchanger?

Answer 3

3

Question 4

Which type of cooling tower uses a high pressure water spray to create the airflow used to cool it?

Answer 4

Venturi

Question 5

In the parallel flow heat exchanger shown, Fluid 2 is the hotter of the 2 fluids at the exchanger inlet. Where would the lowest temperature fall?

image has; both fluids in parallel flow, fluid 1comes in at inlet, fluid 2 to be cooled.

Answer 5

Its lowest temperature will fall between the inlet
temperatures of the 2 fluids

Question 6

The purpose of a heat exchanger is to:

Answer 6

Transfer heat from one fluid to another without mixing

Question 7

A plate type heat exchanger has (small / large) surface area and (is / is not) well suited to high pressure applications.

Answer 7

Large; is not

Question 8

When lifting a large tube bundle, where do you support?

Answer 8

Support the bundle under the baffles or tube sheet

Question 9

A heat exchanger operates at 275 psi. What hydrostatic test pressure should be applied?

Answer 9

412.5psi, 1.5 times the operating pressure.

Question 10

What best describes the function of a heat exchanger?

Answer 10

Transfers heat from a warm fluid to a cooler fluid without mixing

Question 11

What baffle determines the number of shell side fluid passes in a shell and tube heat exchanger?

Answer 11

Longitudinal baffles

Question 12

What is the purpose of drift eliminators in a mechanical draft cooling tower?

Answer 12

To maintain consistent cooling tower flow rates

Question 13

The fluid flowing through the inside of the tubes on a u-tube exchanger is usually:
Dirty or Clean?

Answer 13

Clean, u-tube hard to clean

Question 14

What baffle has the same function as Disc and Doughnut baffles?

Answer 14

Segmental

Question 15

The shell side of a fixed tube sheet exchanger is cleaned by:

Answer 15

Flushing

Question 16

What baffle prevents erosion of the tubes in exchangers with high shell-side inlet velocities?

Answer 16

Impingement

Question 17

What affects cooling tower efficiency?

Answer 17

1. Contact time between air and water
2. Relative Humidity in the area
3. Temperature difference between air and water

Question 18

A double pipe heat exchanger has the advantage of being:

Answer 18

1) Well-suited for high pressures and temperatures

2) Modular; capacity can be added as required

3) Easy to service

Question 19

As a safety precaution when removing the channel head for tube sheet inspection, which flange bolts should be loosened first?

Answer 19

Bottom, if any pressure left in the exchanger, this allows fluid to drain down safely onto the floor instead of spraying out onto the workers.

Question 20

What property is required of a material used for heat exchanger tubing?

Answer 20

High Thermal Conductivity

Question 21

What will conduct heat energy most effectively?

Answer 21

Metals

Question 22

What heat exchanger is most likely to suffer from thermal stresses causing tube sheet leakage?

Answer 22

Fixed Tube Sheet

Question 23

How does a cooling tower lower the process water temperature?

Answer 23

Evaporation of a portion of the water to be cooled

Question 24

Which heat exchanger flow path arrangement can the two fluids reverse temperatures if given enough time in contact?

Answer 24

Counter-Flow

Question 25

How can you quickly determine if there is a tube sheet leak on a double tube sheet exchanger?

Answer 25

The leaking fluid will be seen on the floor below the exchanger

Question 26

How are leaking tubes isolated?

Answer 26

Plugs(Metal, wood, Fibre) used to plug(isolate) tube ends.

Question 27

Thermal stresses on a fixed tube sheet exchanger will often cause?

Answer 27

Tube sheet leaks

Question 28

The reason copper is commonly used as a heat exchanger material is:

Answer 28

it has High Thermal Conductivity

Question 29

What factors affect the amount of heat transferred?

Answer 29

Surface area, temperature difference, contact time