Duckwork Sizing

Front 1

1. Which of the following is not one of the three methods used to size duct systems?

Back 1

Equal freedom of flow

Front 2

2. Typical duct velocities for low-velocity duct systems are show in table 5.1. What is the air flow of the main duct return for hotel bedrooms in feet per minute

Back 2

1300

Front 3

3. What does a duct configurator do?

Back 3

Is sizes and analyzes supply duct systems

Front 4

4. What is meant by equal friction in a duct system?

Back 4

This method of sizing supply duct systems figures constant pressure loss pre unit length

Front 5

5. What offsets friction losses in ducts?

Back 5

Static pressure

Front 6

6. The Trane Ductulator simplifies the Manual process of sizing ductwork based on the equal-__________methodology.

Back 6

Friction

Front 7

7. What are the three primary task for the HVAC system of a building?

Back 7

To deliver air, to return air, to make up air

Front 8

8. What is the suggested duct velocity for a high-velocity system used in the main duct supply of a commercial institution

Back 8

2500-3800

Front 9

9. Some equipment removes air from a conditioned space and has to be made up. Which of the following is not such a price of equipment?

Back 9

Microwave oven

Front 10

10. Proper maintenance of the HVAC system of a building is impossible if proper balance of air _______ is not ensured in all occupied building zones or conditioned spaces.

Back 10

Flow

Front 11

11. The HVAC system components in a building require regular ______

Back 11

Cleaning

Front 12

12. There are three generally accepted methods of duct cleaning. Which of the following is not one of them?

Back 12

Wiping with clean rag

Front 13

13.Pneumatically or______ powered rotary brushes are used to dislodge dirt and dust particles that become airborne; they are then drawn downstream through the duct system.

Back 13

Electrically

Front 14

14. What is the factor that must be taken into consideration when planning and operating and HVAC system in elevated areas of the country?

Back 14

Altitude

Front 15

15. Conventional vacuuming equipment may ______ extremely fine particulate matter into the building air space rather than collect it.

Back 15

Discharge

Front 16

The function is a duct system is to provide a means to transmit air from the air-handling equipment.

Back 16

True

Front 17

If the manual method is used to size the duct systems, they should be calculated by following one of the accepted procedures found in standard design handbooks.

Back 17

True

Front 18

3. The equal friction method is the most widely used method of sizing lower-pressure, lower-velocity duct systems.

Back 18

True

Front 19

4. The static-regain design method sizes the supply-duct system to obtain uniform static pressure at all branches and outlets.

Back 19

True

Front 20

5. The trane duct configurator can model both constant and variable volume systems.

Back 20

True

Front 21

Cleaning ducts is the job of outside contractors.

Back 21

False

Front 22

7. The HVAC system components in a building will require regular cleaning.

Back 22

True

Front 23

8. Sanitizing treatments to kill mold, mildew, bacteria, and so forth are generally administering by self-contained foggers or vaporizers or by air-driven spray units.

Back 23

True

Front 24

There are three generally accepted methods for duct cleaning

Back 24

True

Front 25

In the power-brush method of cleaning a vacuum collection device is connected to the upstream end of the section being cleaned

Back 25

False

Front 26

Air washing is another method of cleaning air ducts

Back 26

True

Front 27

If you are hiring a contractor for duct cleaning you should ask for proof of insurance and a state license

Back 27

True

Front 28

A schedule for inspections of ductwork should be maintained.

Back 28

True

Front 29

When designing a ductwork system either manually or by computer the effects of high altitude must be accounted for in the design

Back 29

True