Methods to reduce power consumption of air compressor

Methods to reduce power consumption of air compressor
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1. Cooling cylinder by spraying water during compression stroke. 2. Circulation of water surrounding to cylinder by providing jackets 3. Installing inter cooler between two cylinders 4. Providing greater fins on cylinder 5. By selecting suitable material for cylinder 6. By providing suitable choice of cylinder proportions i.e. short stroke and large bore in construction with sleeve valve
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Reduction in the delivery pressure of a Compressor working at 7 bar, by 1 bar would reduce the power consumption by a) 6 to 10 % b) 2 to 3 % c) 12 to 14 % d) None of the above

Description : Reduction in the delivery pressure of a Compressor working at 7 bar, by 1 bar would reduce the power consumption by a) 6 to 10 % b) 2 to 3 % c) 12 to 14 % d) None of the above

Last Answer : a) 6 to 10 %

The percentage increase in power consumption of a compressor with suction side air filter and with the pressure drop across the filter of 200 mmWc is ____ a) 1.0% b) 3% c) 2.4% d) 1.6%

Description : The percentage increase in power consumption of a compressor with suction side air filter and with the pressure drop across the filter of 200 mmWc is ____ a) 1.0% b) 3% c) 2.4% d) 1.6% 

Last Answer : d) 1.6%

For every 4°C raise in air inlet temperature of an air compressor, the power consumption will increases by_____ a) 2% b) 1% c) 3% d) 4%

Description : For every 4°C raise in air inlet temperature of an air compressor, the power consumption will increases by_____ a) 2% b) 1% c) 3% d) 4%

Last Answer : b) 1%

Can you explain how temperature of inlet air affects the energy consumption of an air compressor?

Description : Can you explain how temperature of inlet air affects the energy consumption of an air compressor?

Last Answer : As a thumb rule “for every 4 °C rise in inlet air temperature results in a higher energy consumption by 1% to achieve equivalent output”. Hence cool air intake leads to a more efficient compression.

The freezer in a refrigerator is fitted near the top – (1) to keep it away from hot compressor which is nearer to the bottom (2) because of convenience (3) it facilitates convection currents (4) to minimise power consumption

Description : The freezer in a refrigerator is fitted near the top – (1) to keep it away from hot compressor which is nearer to the bottom (2) because of convenience (3) it facilitates convection currents (4) to minimise power consumption

Last Answer : (3) it facilitates convection currents Explanation: The freezer in a refrigerator is fitted near the top so that it can cool the whole interior by setting up ... compartment temperature excessively causes difficulties in maintaining above-reezing temperature in the refrigerator compartment.

The specific power consumption of non lubricated compressor compared to lubricated type is ____ a) Lesser b) Same c) Higher d) None

Description : The specific power consumption of non lubricated compressor compared to lubricated type is ____ a) Lesser b) Same c) Higher d) None 

Last Answer : c) Higher

The freezer in a refrigerator is fitted near the top (1) to keep it away from hot compressor which is nearer to the bottom (2) because of convenience (3) it facilitates convection currents (4) to minimise power consumption

Description : The freezer in a refrigerator is fitted near the top (1) to keep it away from hot compressor which is nearer to the bottom (2) because of convenience (3) it facilitates convection currents (4) to minimise power consumption

Last Answer : it facilitates convection currents

Which one of the following methods can be adopted to obtain isothermal compression in an air compressor? A. Increasing the weight of the compressor B. Inter-stage heating C. Atmospheric cooling D. Providing appropriate dimensions to the cylinder

Description : Which one of the following methods can be adopted to obtain isothermal compression in an air compressor? A. Increasing the weight of the compressor B. Inter-stage heating C. Atmospheric cooling D. Providing appropriate dimensions to the cylinder

Last Answer : ANSWER : A

The basic function of air dryer in a compressor is: a. prevent dust from entering compressor b. storage and smoothening pulsating air output c. reduce the temperature of the air before it enters the next state to increase efficiency d. to remove remaining traces of moisture after after-cooler

Description : The basic function of air dryer in a compressor is: a. prevent dust from entering compressor b. storage and smoothening pulsating air output c. reduce the temperature of the air before it enters the next state to increase efficiency d. to remove remaining traces of moisture after after-cooler 

Last Answer : d. to remove remaining traces of moisture after after-cooler 

From base load operation and from achieving best specific energy consumption point of view, which of the following compressors are suitable? a) Single stage reciprocating compressors b) Centrifugal compressors c) Two stage reciprocating compressor d) Multi stage reciprocating compressor

Description : From base load operation and from achieving best specific energy consumption point of view, which of the following compressors are suitable? a) Single stage reciprocating compressors b) Centrifugal compressors c) Two stage reciprocating compressor d) Multi stage reciprocating compressor

Last Answer : b) Centrifugal compressors

From the point of lower specific energy consumption, which of the following compressors are suitable for part load operation? a) Two stage reciprocating compressors b) Centrifugal compressors c) Two stage screw compressor d) Single stage screw compressor

Description : From the point of lower specific energy consumption, which of the following compressors are suitable for part load operation? a) Two stage reciprocating compressors b) Centrifugal compressors c) Two stage screw compressor d) Single stage screw compressor

Last Answer : a) Two stage reciprocating compressors

How promising is the "air lubrication" idea to increase the speed of ships and reduce the consumption of fuel?

Description : How promising is the "air lubrication" idea to increase the speed of ships and reduce the consumption of fuel?

Last Answer : I think passive systems, like shark skin like surfaces, will be more promising than active systems, as those also consume energy. I am also not sure how the bubbles would affect the vessels buoyancy.

One of the purposes of sub-cooling the liquid refrigerant is to (a) reduce compressor overheating (b) reduce compressor discharge temperature (c) increase cooling effect (d) ensure that only liquid and not the vapour enters the expansion (throttling) valve

Description : One of the purposes of sub-cooling the liquid refrigerant is to (a) reduce compressor overheating (b) reduce compressor discharge temperature (c) increase cooling effect (d) ensure that only liquid and not the vapour enters the expansion (throttling) valve

Last Answer : Ans: d

Multistage compressors are used in industry, because they (A) Reduce the cost of compressor (B) Reduce the size requirement (C) Resemble closely to isothermal compression (D) Are easy to control

Description : Multistage compressors are used in industry, because they (A) Reduce the cost of compressor (B) Reduce the size requirement (C) Resemble closely to isothermal compression (D) Are easy to control

Last Answer : (C) Resemble closely to isothermal compression

Which of the following methods may be adopted to reduce the effects of armature reaction ? (a) Increase in length of air gap at pole tips (b) Increasing reluctance of pole tips (c) Compensating windings (d) Interpoles (e) All of the above

Description : Which of the following methods may be adopted to reduce the effects of armature reaction ? (a) Increase in length of air gap at pole tips (b) Increasing reluctance of pole tips (c) Compensating windings (d) Interpoles (e) All of the above

Last Answer : (e) All of the above

Two stage reciprocating air compressor with P – V diagram

Description : Two stage reciprocating air compressor with P – V diagram

Last Answer : Two stage reciprocating air compressors consist of two cylinders. One is called low-pressure cylinder and another is called high-pressure cylinder. When piston in a low-pressure cylinder is at ... & discharge valves open. This desired high-pressure air is then delivered to a receiver. 

The power required to drive a turbo compressor for a given pressure ratio decreases when A. Air is heated at entry B. Air is cooled at entry C. Air is cooled at exit D. Air is heated at exit

Description : The power required to drive a turbo compressor for a given pressure ratio decreases when A. Air is heated at entry B. Air is cooled at entry C. Air is cooled at exit D. Air is heated at exit

Last Answer : ANSWER : B

Interstage coolers are provided in a multistage compressor to (A) Save power in compressing a given volume to a given pressure (B) Cool the delivered air (C) Achieve the exact delivery pressure (D) None of these

Description : Interstage coolers are provided in a multistage compressor to (A) Save power in compressing a given volume to a given pressure (B) Cool the delivered air (C) Achieve the exact delivery pressure (D) None of these

Last Answer : (A) Save power in compressing a given volume to a given pressure

Capacity & power requirement for an air compressor working at high altitude compared to sea-level will be (A) More (B) Less (C) Same (D) Either more or less; depends on the climatic conditions

Description : Capacity & power requirement for an air compressor working at high altitude compared to sea-level will be (A) More (B) Less (C) Same (D) Either more or less; depends on the climatic conditions

Last Answer : (B) Less

How Much Air Will I Need To Power My Air Compressor Tool?

Description : How Much Air Will I Need To Power My Air Compressor Tool?

Last Answer : Generally, most air tools will take around 70-100 PSI, and will consume less than 10 CFM, however consult the manual or manufacturer of your tool for exact air requirements.

Can GPS trackers reduce fuel consumption?

Description : Can GPS trackers reduce fuel consumption?

Last Answer : A GPS tracker has very little o do with fuel consumption. Using a GPS will, however, allow you to plan the shortest route to your destination thereby reducing the fuel consumption.

How can a dairy farmer reduce fodder consumption by his cattle and also increase milk production? (1) By increasing the supply of feed concentrate (2) By stall feeding (3) By allowing the cattle to graze in the fields (4) By administering hormones

Description : How can a dairy farmer reduce fodder consumption by his cattle and also increase milk production? (1) By increasing the supply of feed concentrate (2) By stall feeding (3) By allowing the cattle to graze in the fields (4) By administering hormones

Last Answer : (3) By allowing the cattle to graze in the fields Explanation: Like dry fodder is used to fill the empty space in the stomach of cattle, green fodder can also achieve the same result. Fat ... to milk. Green fodder can nicely substitute dry fodder and at the same time keeping the cattle satisfied.

Limestone is added in the blast furnace (during pig iron manufacture) to (A) Form slag by combining with impurities (B) Supply heat by undergoing exothermic reaction with impurities (C) Reduce the coke consumption (D) Reduce slag viscosity

Description : Limestone is added in the blast furnace (during pig iron manufacture) to (A) Form slag by combining with impurities (B) Supply heat by undergoing exothermic reaction with impurities (C) Reduce the coke consumption (D) Reduce slag viscosity

Last Answer : Option A

108. is primarily a management technique that uses energy information as a basis to eliminate waste, reduce and control current level of energy use and improve the existing operating procedures. a) Energy monitoring and targeting b) CUSUM c) Specific energy consumption d) Production

Description : 108.is primarily a management technique that uses energy information as a basis to eliminate waste, reduce and control current level of energy use and improve the existing operating procedures. a) Energy monitoring and targeting b) CUSUM c) Specific energy consumption d) Production

Last Answer : Energy monitoring and targeting

________ to reduce or control energy consumption. a] Determining c] Highlighting b] Recording d] Setting Targets

Description : ________ to reduce or control energy consumption. a] Determining c] Highlighting b] Recording d] Setting Targets

Last Answer : setting targets

The primary objective of energy audit is to determine ways to ______ energy consumption per unit of product output. A. Increase. C) Slightly increase. B. Reduce. D) Change.

Description : The primary objective of energy audit is to determine ways to ______ energy consumption per unit of product output. A. Increase. C) Slightly increase. B. Reduce. D) Change.

Last Answer : reduce

According to……………… ―energy audit‖ means verification, monitoring, analysis of use of energy including submission of technical report containing recommendations for improving energy efficiency with cost benefit analysis and an action plan to reduce energy consumption a) Energy conservation act 2001 b) Industrial act 1946 c) Factory act 1947 d) none of act

Description : According to -energy audit means verification, monitoring, analysis of use of energy including submission of technical report containing recommendations for improving energy efficiency with cost benefit analysis ... act 2001 b) Industrial act 1946 c) Factory act 1947 d) none of act

Last Answer : Energy conservation act 2001

Heat recovery provides valuable energy sources and ....... consumption. a) Reduce energy b) Increase energy c) Increase fuel d) Reduce fuel

Description : Heat recovery provides valuable energy sources and ....... consumption. a) Reduce energy b) Increase energy c) Increase fuel d) Reduce fuel

Last Answer : Reduce energy

A waste heat recovery system in industrial process has been key to reduce ....... Consumption. a) Coal b) Fuel c) Biogas d) Oil

Description : A waste heat recovery system in industrial process has been key to reduce ....... Consumption. a) Coal b) Fuel c) Biogas d) Oil

Last Answer : Fuel

Daal is now being sold at Rs. 20/kg. During last month its rate was Rs. 16/kg. By how much percent should a family reduce its consumption so as to keep the expenditure fixed?

Description : Daal is now being sold at Rs. 20/kg. During last month its rate was Rs. 16/kg. By how much percent should a family reduce its consumption so as to keep the expenditure fixed?

Last Answer : Answer: 20%.

Select the drug that may improve myocardial tolerance to ischaemia and reduce anginal attacks without altering heart rate, blood pressure or myocardial O2 consumption: A. Trimetazidine B. Nicorandil C. Dipyridamole D. Nicotinic acid

Description : Select the drug that may improve myocardial tolerance to ischaemia and reduce anginal attacks without altering heart rate, blood pressure or myocardial O2 consumption: A. Trimetazidine B. Nicorandil C. Dipyridamole D. Nicotinic acid

Last Answer : A. Trimetazidine

The price of petrol increases by 25%. By what percentage must a customer reduce the consumption so that the earlier bill on the petrol does not alter? (A) 20% (B) 25% (C) 30% (D) 33.33%

Description : The price of petrol increases by 25%. By what percentage must a customer reduce the consumption so that the earlier bill on the petrol does not alter? (A) 20% (B) 25% (C) 30% (D) 33.33%

Last Answer : Answer: A

Chenna dhal is now being sold at Rs. 70 a kg. Last month, is rate was Rs. 80 per kg. By how much percent should a family reduce its consumption so as to keep the expenditure fixed? a)12.5 b)21.8 c)23 d)18

Description : Chenna dhal is now being sold at Rs. 70 a kg. Last month, is rate was Rs. 80 per kg. By how much percent should a family reduce its consumption so as to keep the expenditure fixed? a)12.5 b)21.8 c)23 d)18

Last Answer : Answer: A  Let a family's monthly consumption of chenna dhal be x kg.  To keep the expenditure fixed,  their consumption for this month should be 70x/80 = 7x/8.  Reduction in consumption = x/8 = 12.5% of x

The equipment installed in power plants to reduce air pollution due to smoke is

Description : The equipment installed in power plants to reduce air pollution due to smoke is (A) Induced draft fans (B) De -super heaters (C) Electrostatic precipitators (D) Re -heaters

Last Answer : The equipment installed in power plants to reduce air pollution due to smoke is electrostatic precipitated.

Our air conditioning compressor went out. The bedrooms are hot now.What is a decent air conditioning brand?

Description : Our air conditioning compressor went out. The bedrooms are hot now.What is a decent air conditioning brand?

Last Answer : Why not just replace the compressor on the unit you have right now?

Classification of air compressor

Description : Classification Of Air Compressor

Last Answer : Air compressors are classified in several different ways, depending on the specific characteristics and features of the compressor. Here are a few common ways that air compressors are classified: ... range of sizes and capacities, from small, portable units to large, industrial-sized compressors.

How to replace air conditioning compressor ford mondeo mk3 tddi diesel 2.0 85kw

Description : The approach is terrible.

Last Answer : Need Answer

how to fix my air compressor?

Description : how to fix my air compressor?

Last Answer : Need Answer

What Two factors must be considered when selecting a suitable site for new air compressor?

Description : What Two factors must be considered when selecting a suitable site for new air compressor?

Last Answer : Need answer

Do you pay sales tax to repair an air compressor in Texas?

Description : Do you pay sales tax to repair an air compressor in Texas?

Last Answer : What is the answer ?

How To Choose An Air Nailer For Your Home Shop Air Compressor?

Description : How To Choose An Air Nailer For Your Home Shop Air Compressor?

Last Answer : In today's home shop equipment lineup, an air compressor hasbecome a vital addition. Along with an air compressor you will bean assortment of air power tools. One family of air power tools ... are available in lengths from one to four inches.The finishing nailer is typically used to assemble

What does a stage air compressor do?

Description : What does a stage air compressor do?

Last Answer : A stage air compressor is a heavy duty compressor that increases the amount of air is a tight, confined space. It uses two cylinders and two pistons; one piston pumps air from the first cylinder ... . You can find a picture and detailed diagram of a stage air compressor at www.ecompressedair.com.

Which person was the inventor of the gas air compressor?

Description : Which person was the inventor of the gas air compressor?

Last Answer : The 19th century British scientist and inventor Michael Faraday discovered that compressing and liquefying a certain gas could chill air when the liquefied.

where can i find a cheap porter cable air compressor?

Description : where can i find a cheap porter cable air compressor?

Last Answer : Cheap porter cable air compressor can be found online or at your local hardware store. They will carry a selection that will suit and fit your needs.

Where can I get a replacement motor for a 12v air compressor?

Description : Where can I get a replacement motor for a 12v air compressor?

Last Answer : That depends on the manufacturer. Check the unit for model numbers and check your owners manual for contact information. The manufacturer may have a website listed in the owners manual.

Storing your Air Compressor?

Description : Storing your Air Compressor?

Last Answer : To complete your ultimate garage workshop you purchased an air compressor to complete your power tool collection. But where do you put it? What kind of air compressor you have will determine where to place ... Because they aren't portable, these beasts need to be as close to a power outlet as possib

A reciprocating compressor is not suitable for use as a supercharger because: A. it runs at lower rpm B. the pressure ratio is high C. volumetric efficiency is high D. it is bulky and can handle small quantity of air

Description : A reciprocating compressor is not suitable for use as a supercharger because: A. it runs at lower rpm B. the pressure ratio is high C. volumetric efficiency is high D. it is bulky and can handle small quantity of air

Last Answer : ANSWER : D

The volume of air delivered by the compressor is called A. Free air delivery B. Compressor capacity C. Swept volume D. Mean effective pressure

Description : The volume of air delivered by the compressor is called A. Free air delivery B. Compressor capacity C. Swept volume D. Mean effective pressure

Last Answer : ANSWER : B

The maximum delivery pressure in a rotary air compressor is A. 10 bar B. 20 bar C. 30 bar D. 50 bar

Description : The maximum delivery pressure in a rotary air compressor is A. 10 bar B. 20 bar C. 30 bar D. 50 bar

Last Answer : ANSWER : A

In a single acting reciprocating compressor, the suction, compression and delivery of air takes place in A. One stroke B. Two stroke C. Three stroke D. Four stroke

Description : In a single acting reciprocating compressor, the suction, compression and delivery of air takes place in A. One stroke B. Two stroke C. Three stroke D. Four stroke

Last Answer : ANSWER : B