What Is Cfm & Infiltration?

What Is Cfm & Infiltration?
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The infiltration rate is the volumetric flow rate of outside air into a building, typically in cubic feet per minute (CFM) or liters per second (LPS). The air exchange rate, (I), is the number of interior volume air changes that occur per hour, and has units of 1/h.
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Related questions

What Is Cfm?

Description : What Is Cfm?

Last Answer : The notation CFM (Cubic Feet per Minute) refers to a volume of air produced by the air compressor at a given pressure or PSI (Pound per Square Inch)

HELP. Is the guy with the drinks on the Visit California Snow commercial Jamie Kennedy? Huge debate right now in this house. Here's the website with the video: http://www.visitcalifornia.com/AM/Template.cfm?Section=Winter_Recreation?

Description : HELP. Is the guy with the drinks on the Visit California Snow commercial Jamie Kennedy? Huge debate right now in this house. Here's the website with the video: http://www.visitcalifornia.com/AM/Template.cfm?Section=Winter_Recreation?

Last Answer : Yes, elsewhere on the site it says: Actor and comedian Jamie Kennedy makes an appearance, with Governor Arnold Schwarzenegger closing the spot with another memorable line. “There’ll always be room at the top,” he says from the summit at Mammoth Mountain.

What is the full form of 'CFM' ? -How To ?

Description : What is the full form of 'CFM' ? -How To ?

Last Answer : The full form of 'CFM' is Chief Finance Manager

What is the full form of CFM ?

Last Answer : Cubic Feet per Minute.

What does the CFM number on a ventilation fan mean?

Description : What does the CFM number on a ventilation fan mean?

Last Answer : CFM stands for cubic feet per minute. It's a measure of how much air the fan will move, but a higher CFM also means more noise.

What is the difference between CFM (cubic feet per minute) and SCFM (standard cubic feet per minute)?

Description : What is the difference between CFM (cubic feet per minute) and SCFM (standard cubic feet per minute)?

Last Answer : CFM and SCFM are both measures of flow rate. CFM might refer to either the flow rate of a gas or a liquid, whereas SCFM refers only to the flow rate of a gas. The same mass flow rate of a gas ( ... to that flow rate and, because of that, the CFM flow rate cannot be converted to a mass flow rate

If the compressor of 200 cfm loads in 10 seconds and unloads in 20 seconds, the air leakage would be_____ a) 67 cfm b) 100 cfm c) 10 cfm d) 133 cfm

Description : If the compressor of 200 cfm loads in 10 seconds and unloads in 20 seconds, the air leakage would be_____ a) 67 cfm b) 100 cfm c) 10 cfm d) 133 cfm 

Last Answer : a) 67 cfm

Vertical type reciprocating compressors are used in the capacity range of _____ a) 50 – 150 cfm b) 200 – 500 cfm c) Above 10ooo cfm d) 10 – 50 cfm

Description : Vertical type reciprocating compressors are used in the capacity range of _____ a) 50 – 150 cfm b) 200 – 500 cfm c) Above 10ooo cfm d) 10 – 50 cfm 

Last Answer : a) 50 – 150 cfm

In practical operation of any furnace, zero oxygen percentage or theoretical CO2 percentage in flue gas is rarely achieved, because of (A) Use of non-preheated combustion air (B) Use of pulverised solid fuels (C) Imperfect mixing of fuel & air and infiltration of air (D) Use of excessive positive draft in the furnace

Description : In practical operation of any furnace, zero oxygen percentage or theoretical CO2 percentage in flue gas is rarely achieved, because of (A) Use of non-preheated combustion air (B) Use of pulverised solid ... of fuel & air and infiltration of air (D) Use of excessive positive draft in the furnace

Last Answer : (C) Imperfect mixing of fuel & air and infiltration of air

What is the simple formula for calculating Infiltration Rates?

Description : What is the simple formula for calculating Infiltration Rates?

Last Answer : I would say use the mm/min equation then multiply by 60 to get the mm/hour.

What restricts the infiltration of water in desert soil? -Geography

Description : What restricts the infiltration of water in desert soil? -Geography

Last Answer : Arid or desert soils are found in deserts. These soils are formed by wind activities and are sandy in nature. It lacks moisture and humus due to the dry climate and high temperature ... quantity of calcium carbonates and sodium, kankar is formed and restricts infiltration of water in the soil.

How do the soil particles affect the infiltration in water?

Description : How do the soil particles affect the infiltration in water?

Last Answer : Need answer

What are Non example of infiltration?

Description : What are Non example of infiltration?

Last Answer : Need answer

What set of surface soil conditions on a hillside would result in the most infiltration of rainfall?

Description : What set of surface soil conditions on a hillside would result in the most infiltration of rainfall?

Last Answer : What is the answer ?

What concept or principle requires layered complementary controls sufficient to detect and deter infiltration and exploitation of an organization its information systems and its facilities?

Description : What concept or principle requires layered complementary controls sufficient to detect and deter infiltration and exploitation of an organization its information systems and its facilities?

Last Answer : The security indepth concept

Infiltration rate is relatively higher in

Description : Infiltration rate is relatively higher in

Last Answer : Ans. Sandy soil

For design purposes, the normal rate of infiltration of ground water into the sewer, is A. 500 litres/km/cm B. 1000 litres/km/cm C. 1500 litres/km/cm D. 2000 litres/km/cm

Description : For design purposes, the normal rate of infiltration of ground water into the sewer, is A. 500 litres/km/cm B. 1000 litres/km/cm C. 1500 litres/km/cm D. 2000 litres/km/cm

Last Answer : ANS: D

¾th or ¼th extra space is left in sewer pipes at maximum discharge for A. Low estimates of the average and maximum flows B. Large scale infiltration of storm water C. Unexpected increase in population D. All the above

Description : ¾th or ¼th extra space is left in sewer pipes at maximum discharge for A. Low estimates of the average and maximum flows B. Large scale infiltration of storm water C. Unexpected increase in population D. All the above

Last Answer : ANS: D

Sewer pipes are designed for maximum discharge with 25% to 33% vacant cross-sectional area for A. Unexpected large scale infiltration of stream water B. Unexpected increase in the population C. Under estimates of maximum and average flows D. All of the above

Description : Sewer pipes are designed for maximum discharge with 25% to 33% vacant cross-sectional area for A. Unexpected large scale infiltration of stream water B. Unexpected increase in the population C. Under estimates of maximum and average flows D. All of the above

Last Answer : ANS: D

Which of the following are included in the finishing operations for porous bearing? [IES-2005] 1. Infiltration 2.Sizing 3.Heat treatment 4.Coining Select the using the code given below: (a) 1 and 2 (b) 2 and 3 (c) 2 and 4 (d) 1 and 4

Description : Which of the following are included in the finishing operations for porous bearing? [IES-2005] 1. Infiltration 2.Sizing 3.Heat treatment 4.Coining Select the using the code given below: (a) 1 and 2 (b) 2 and 3 (c) 2 and 4 (d) 1 and 4

Last Answer : (a) 1 and 2

The nearly constant rate of infiltration that develops after some time has elapsed from the start of irrigation is termed as? [a] Infiltration rate [b] Infiltration velocity [c] Basic Infiltration rate [d] Constant infiltration velocity [e] None of the above

Description : The nearly constant rate of infiltration that develops after some time has elapsed from the start of irrigation is termed as? [a] Infiltration rate [b] Infiltration velocity [c] Basic Infiltration rate [d] Constant infiltration velocity [e] None of the above

Last Answer : [c] Basic Infiltration rate

Downward entry and movement of water in soil surface is — a. Percolation b. Infiltration c. Permeability d. None of these

Description : Downward entry and movement of water in soil surface is — a. Percolation b. Infiltration c. Permeability d. None of these

Last Answer : b. Infiltration

Rapid infiltration rate is recorded in — soil a. Clay b. Loamy soil c. Sandy soil d. None of these

Description : Rapid infiltration rate is recorded in — soil a. Clay b. Loamy soil c. Sandy soil d. None of these

Last Answer : c. Sandy soil

Capacity of soil to absorb moisture, is generally known as (A) Permeability (B) Porosity (C) Infiltration capacity (D) Perviousness

Description : Capacity of soil to absorb moisture, is generally known as (A) Permeability (B) Porosity (C) Infiltration capacity (D) Perviousness

Last Answer : (C) Infiltration capacity

Water to the consumers may be supplied from (A) Infiltration galleries connected to sump well (B) Infiltration well dug out on the banks of rivers (C) Ranney wells sunk to the water level (D) All the above

Description : Water to the consumers may be supplied from  (A) Infiltration galleries connected to sump well  (B) Infiltration well dug out on the banks of rivers  (C) Ranney wells sunk to the water level  (D) All the above 

Last Answer : (D) All the above 

Pick up the incorrect statement from the following. The underground sources of water, is from (A) Wells (B) Springs (C) Infiltration wells (D) Storage reservoirs

Description : Pick up the incorrect statement from the following. The underground sources of water, is from  (A) Wells  (B) Springs  (C) Infiltration wells  (D) Storage reservoirs

Last Answer : (D) Storage reservoirs

An intense rain is falling at a uniform rate of 7.5 cm/hour for a period of 60 minutes on a basin whose area is 500 hectares. If the average infiltration capacity during the entire rain period is assumed to be 1.5 cm/hr, the maximum run-off rate based on 10 minute peak percentage of 16% from distributing graph of the basin, is (A) 40 cumecs (B) 60 cumecs (C) 80 cumecs (D) 100 cumecs

Description : An intense rain is falling at a uniform rate of 7.5 cm/hour for a period of 60 minutes on a basin whose area is 500 hectares. If the average infiltration capacity during the entire rain period is assumed to be 1.5 ... of the basin, is (A) 40 cumecs (B) 60 cumecs (C) 80 cumecs (D) 100 cumecs

Last Answer : Answer: Option C

If the potential infiltration of a water shed having a soil with fair pasture cover, is 10 cm and rainfall is 12 cm, the direct run off is : (A) 2 cm (B) 3 cm (C) 5 cm (D) 7 cm

Description : If the potential infiltration of a water shed having a soil with fair pasture cover, is 10 cm and rainfall is 12 cm, the direct run off is : (A) 2 cm (B) 3 cm (C) 5 cm (D) 7 cm

Last Answer : Answer: Option C

If the slope of a line for infiltration capacity curve is 1/1.737, the value of constant k in Horton's equation of infiltration capacity curve, is (A) 2.0 (B) 2.5 (C) 4.0 (D) 5.0

Description : If the slope of a line for infiltration capacity curve is 1/1.737, the value of constant k in Horton's equation of infiltration capacity curve, is (A) 2.0 (B) 2.5 (C) 4.0 (D) 5.0

Last Answer : Answer: Option C

According to Robert E. Horton, the equation of infiltration capacity curve, is (where letters carry their usual meanings) (A) f = fc (fo - fc ) e kt (B) f = ft - (fo - fc ) e -kt (C) f = ft + (fo - fc ) e -kt (D) f = f + (fo - fc ) ekt

Description : According to Robert E. Horton, the equation of infiltration capacity curve, is (where letters carry their usual meanings) (A) f = fc (fo - fc ) e kt (B) f = ft - (fo - fc ) e -kt (C) f = ft + (fo - fc ) e -kt (D) f = f + (fo - fc ) ekt

Last Answer : Answer: Option C

The main factor which affects the infiltration capacity, is (A) Thickness of saturated layer (B) Depth of surface detention (C) Soil moisture (D) All the above

Description : The main factor which affects the infiltration capacity, is (A) Thickness of saturated layer (B) Depth of surface detention (C) Soil moisture (D) All the above

Last Answer : Answer: Option D

Pick up the correct statement from the following: (A) When rainfall rate exceeds the infiltration capacity, the water enters the soil at full capacity rate (B) When rainfall rate is less than the infiltration capacity, the infiltration rate is approximately equal to the rainfall rate (C) The actual infiltration rate at any time may be equal to or less than the infiltration capacity (D) All the above

Description : Pick up the correct statement from the following: (A) When rainfall rate exceeds the infiltration capacity, the water enters the soil at full capacity rate (B) When rainfall rate is less than the ... rate at any time may be equal to or less than the infiltration capacity (D) All the above

Last Answer : Answer: Option D

The infiltration capacity during rain storm, is considerably reduced due to (A) Surface detention (B) Soil moisture (C) Compaction due to rain (D) All the above

Description : The infiltration capacity during rain storm, is considerably reduced due to (A) Surface detention (B) Soil moisture (C) Compaction due to rain (D) All the above

Last Answer : Answer: Option D

Pick up the correct statement from the following: (A) Rain which is intercepted by buildings, vegetations and other objects, is generally known as rainfall interception (B) The difference between the total rainfall and intercepted rainfall, is generally called ground rainfall (C) When rainfall exceeds the interception rainfall, water reaches the ground and infiltration starts (D) All the above

Description : Pick up the correct statement from the following: (A) Rain which is intercepted by buildings, vegetations and other objects, is generally known as rainfall interception (B) The difference between ... the interception rainfall, water reaches the ground and infiltration starts (D) All the above

Last Answer : Answer: Option D

Rain simulators are used for the determination of (A) Evaporation (B) Precipitation (C) Run off (D) Infiltration capacity

Description : Rain simulators are used for the determination of (A) Evaporation (B) Precipitation (C) Run off (D) Infiltration capacity

Last Answer : Answer: Option D

The theory of infiltration capacity was given by (A) Merrill Bernard (B) W.W. Horner (C) Le-Roy K. Shermen (D) Robert E. Horten

Description : The theory of infiltration capacity was given by (A) Merrill Bernard (B) W.W. Horner (C) Le-Roy K. Shermen (D) Robert E. Horten

Last Answer : Answer: Option D

If S is the potential infiltration, P is rainfall in cm in a drainage of a soil with fair pasture cover, the direct run off Q in cm is given by (A) Q = (P - 0.1 S)²/(P + 0.4 S) (B) Q = (P - 0.2 S)²/(P + 0.6 S) (C) Q = (P - 0.2 S)²/(P + 0.8 S) (D) Q = (P - 0.2 S)²/(P + 0.2 S)

Description : If S is the potential infiltration, P is rainfall in cm in a drainage of a soil with fair pasture cover, the direct run off Q in cm is given by (A) Q = (P - 0.1 S)²/(P + 0.4 S) (B) Q = (P - 0.2 S)²/(P + 0.6 S) (C) Q = (P - 0.2 S)²/(P + 0.8 S) (D) Q = (P - 0.2 S)²/(P + 0.2 S)

Last Answer : Answer: Option C

Infiltration capacity of soil depends upon (A) Number of voids present in the soil (B) Shape and size of soil particles (C) Arrangement of soil particles (D) All the above

Description : Infiltration capacity of soil depends upon (A) Number of voids present in the soil (B) Shape and size of soil particles (C) Arrangement of soil particles (D) All the above

Last Answer : Answer: Option D

The equation P - Q = Te index for determining the infiltration capacity, was suggested by (A) Horton (B) Horner (C) Lloyd (D) Bernard

Description : The equation P - Q = Te index for determining the infiltration capacity, was suggested by (A) Horton (B) Horner (C) Lloyd (D) Bernard

Last Answer : Answer: Option A

Which of the following statement is FALSE regarding Krukenberg tumors Options: 1) They are primary ovarian carcinomas that always secondarily metastasize to Gastrointestinal organs 2) They are almost invariably bilateral 3) There is no infiltration through the capsule 4) They are freely movable in pelvis

Description : Which of the following statement is FALSE regarding Krukenberg tumors Options: 1) They are primary ovarian carcinomas that always secondarily metastasize to Gastrointestinal organs 2) They are almost ... ) There is no infiltration through the capsule 4) They are freely movable in pelvis

Last Answer : orrect Answer: 1) They are primary ovarian carcinomas that always secondarily metastasize to Gastrointestinal organs

n which of the following techniques the concentration of the local anaesthetic used is the lowest: A. Infiltration anaesthesia B. Nerve block anaesthesia C. Spinal anaesthesia D. Epidural anaesthesia

Description : n which of the following techniques the concentration of the local anaesthetic used is the lowest: A. Infiltration anaesthesia B. Nerve block anaesthesia C. Spinal anaesthesia D. Epidural anaesthesia

Last Answer : A. Infiltration anaesthesia

Adrenaline added to local anaesthetic solution for infiltration anaesthesia affords the following except: A. Prolongs the duration of local anaesthesia B. Makes the injection less painful C. Provides a more bloodless field for surgery D. Reduces systemic toxicity of the local anaesthetic

Description : Adrenaline added to local anaesthetic solution for infiltration anaesthesia affords the following except: A. Prolongs the duration of local anaesthesia B. Makes the injection less painful C. Provides a more bloodless field for surgery D. Reduces systemic toxicity of the local anaesthetic

Last Answer : B. Makes the injection less painful

From which of the following factor has not influence the drainage density: (A) Climate (B) Topography (C) Soil infiltration capacity (D) Anthropogenic activity (E) Vegetation (F) Geology

Description : From which of the following factor has not influence the drainage density: (A) Climate (B) Topography (C) Soil infiltration capacity (D) Anthropogenic activity (E) Vegetation (F) Geology

Last Answer : (D) Anthropogenic activity