Written by students who passed Immediately available after payment Read online or as PDF Wrong document? Swap it for free 4.6 TrustPilot
logo-home
Document preview thumbnail
Preview 1 out of 4 pages
Exam (elaborations)

NATE AIR DISTRIBUTION CORE QUESTIONS

Document preview thumbnail
Preview 1 out of 4 pages

NATE AIR DISTRIBUTION CORE QUESTIONS

Content preview

NATE AIR DISTRIBUTION CORE QUESTIONS

A fan - Answers- creates currents of air

motor driven centrifugal fan that delivers air to conditioned space under pressure -
Answers- blower

2 types of fans - Answers- 1 . Axial - fan axis parallel to air flow
2. Centrifugal - fan axis perpendicular to airflow

fans are classified in according to - Answers- direction of airflow

3 types of axial fans - Answers- propeller, tub axial, vane vial

3 common categories of centrifugal fans - Answers- radial, backward curved, forward
curved

Name the 4 of the variable the fan law uses to predict performance - Answers- RPM,
CFM, STATIC, DENSITY

efficiency of a fan - Answers- power output / power input

furnace cfm - Answers- btu output
-------------
1.1 x temp rise

wheel arrangement for forward curved centrifugal fans with wheel diameter 7" or less -
Answers- direct drive

wheel arrangement for forward curved centrifugal fans with wheel diameter 12" or more
- Answers- belt drive

how to change speed of belt driven fan - Answers- change belt pully

max torque a motor can develop without an abrupt drop in speed - Answers- locked
rotor torque

difference between actual speed and synchronous speed of motor - Answers- slip

effects of belts that are to tight - Answers- shortened bearing life, wasted power, noise

low velocity system operate less than - Answers- 2000 fpm

purpose of register - Answers- control velocity, flowrate and direction of airstream

Document information

Uploaded on
January 2, 2025
Number of pages
4
Written in
2024/2025
Type
Exam (elaborations)
Contains
Questions & answers
$10.99

Wrong document? Swap it for free Within 14 days of purchase and before downloading, you can choose a different document. You can simply spend the amount again.
Written by students who passed
Immediately available after payment
Read online or as PDF

Seller avatar
Reputation scores are based on the amount of documents a seller has sold for a fee and the reviews they have received for those documents. There are three levels: Bronze, Silver and Gold. The better the reputation, the more your can rely on the quality of the sellers work.
GEEKA
3.8
(360)
Sold
2133
Followers
1447
Items
58340
Last sold
11 hours ago



Why students choose Stuvia

Created by fellow students, verified by reviews

Quality you can trust: written by students who passed their tests and reviewed by others who've used these notes.

Didn't get what you expected? Choose another document

No worries! You can instantly pick a different document that better fits what you're looking for.

Pay as you like, start learning right away

No subscription, no commitments. Pay the way you're used to via credit card and download your PDF document instantly.

Student with book image

“Bought, downloaded, and aced it. It really can be that simple.”

Alisha Student

Working on your references?

Create accurate citations in APA, MLA and Harvard with our free citation generator.

Working on your references?

Frequently asked questions