1- State which of the following statements are TRUE? a) Compared to forward curved blades, backward curved blades are more Efficient b) Airfoil type blades are used in small capacity systems c) Fan laws are applicable to all types of fans d) Fan laws are applicable to fans that are geometrically and dynamically similar

Automotive Technology: A Systems Approach (MindTap Course List)
6th Edition
ISBN:9781133612315
Author:Jack Erjavec, Rob Thompson
Publisher:Jack Erjavec, Rob Thompson
Chapter3: Basic Theories And Math
Section: Chapter Questions
Problem 24RQ: All these statements about energy and energy conversion are true, except thermal energy may be...
icon
Related questions
Question
12:28 AM Fri 9 Apr
@ 77%
Done
fan example.pdf
1- State which of the following statements are TRUE?
a) Compared to forward curved blades, backward curved blades are more
Efficient
b) Airfoil type blades are used in small capacity systems
c) Fan laws are applicable to all types of fans
d) Fan laws are applicable to fans that are geometrically and dynamically
similar
2- State which of the following statements are TRUE?
a) For a given fan operating at a constant temperature, the power input to
fan
increases by 4 times when the fan speed becomes double
b) For a given fan operating at a constant temperature, the power input to
fan
increases by 8 times when the fan speed becomes double
c) For a given fan operating at a constant flow rate, the power input
increases as
the air temperature increases
d) For a given fan operating at a constant static pressure rise, the flow rate
reduces as the air temperature increases
3- State which of the following statements are TRUE?
a) For a backward curved blade, the fan total pressure (FTP) increases as
flow
rate increases
b) For a backward curved blade, the fan total pressure (FTP) reaches a
maximum at a particular flow rate
c) When the air filter in the air conditioning duct becomes dirty, the speed
has to
Transcribed Image Text:12:28 AM Fri 9 Apr @ 77% Done fan example.pdf 1- State which of the following statements are TRUE? a) Compared to forward curved blades, backward curved blades are more Efficient b) Airfoil type blades are used in small capacity systems c) Fan laws are applicable to all types of fans d) Fan laws are applicable to fans that are geometrically and dynamically similar 2- State which of the following statements are TRUE? a) For a given fan operating at a constant temperature, the power input to fan increases by 4 times when the fan speed becomes double b) For a given fan operating at a constant temperature, the power input to fan increases by 8 times when the fan speed becomes double c) For a given fan operating at a constant flow rate, the power input increases as the air temperature increases d) For a given fan operating at a constant static pressure rise, the flow rate reduces as the air temperature increases 3- State which of the following statements are TRUE? a) For a backward curved blade, the fan total pressure (FTP) increases as flow rate increases b) For a backward curved blade, the fan total pressure (FTP) reaches a maximum at a particular flow rate c) When the air filter in the air conditioning duct becomes dirty, the speed has to
Expert Solution
steps

Step by step

Solved in 2 steps with 1 images

Blurred answer
Knowledge Booster
Applied Fluid Mechanics
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Automotive Technology: A Systems Approach (MindTa…
Automotive Technology: A Systems Approach (MindTa…
Mechanical Engineering
ISBN:
9781133612315
Author:
Jack Erjavec, Rob Thompson
Publisher:
Cengage Learning
Principles of Heat Transfer (Activate Learning wi…
Principles of Heat Transfer (Activate Learning wi…
Mechanical Engineering
ISBN:
9781305387102
Author:
Kreith, Frank; Manglik, Raj M.
Publisher:
Cengage Learning
Refrigeration and Air Conditioning Technology (Mi…
Refrigeration and Air Conditioning Technology (Mi…
Mechanical Engineering
ISBN:
9781305578296
Author:
John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:
Cengage Learning