What does the "RPM" mean, and is higher or lower better?

What does the "RPM" mean, and is higher or lower better?
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1 Answer

Answer :

RPM = Rotations Per Minutes. the higher the rotation speed, the faster your computer can read/find your files.
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A dc shunt generator has a speed of 800 rpm when delivering 20 A to the load at the terminal voltage of 220V. If the same machine is run as a motor it takes a line current of 20A from 220V supply. The speed of the machine as a motor will be (A) 800 rpm. (B) more than 800 rpm. (C) less than 800 rpm. (D) both higher or lower than 800 rpm.

Description : A dc shunt generator has a speed of 800 rpm when delivering 20 A to the load at the terminal voltage of 220V. If the same machine is run as a motor it takes a line current of 20A from 220V supply. The speed of ... . (B) more than 800 rpm. (C) less than 800 rpm. (D) both higher or lower than 800 rpm.

Last Answer : (C) less than 800 rpm.

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

So how is RPM better than APT or the other way around?

Description : So how is RPM better than APT or the other way around?

Last Answer : Grumpyfish says: RPM was popularized by Redhat (of course), so many of the ones derived from Redhat (Fedora, Centos, etc.) continue to use RPM or yum for package management. Apt grew out of ... CentOS on my production machines. The Debian -> CentOS shift involved a lot of muscle memory retraining.

Is it better to listen to hotel reviews with lower stars but more reviews or higher stars with less reviews?

Description : Is it better to listen to hotel reviews with lower stars but more reviews or higher stars with less reviews?

Last Answer : I would think the one with more reviews. I mean 4 stars is stir good, right? And it’s been rated more. Sorry I don’t know about hotels but I think that makes sense.

Which is a better car deal: a lower price and a higher interest rate, or a higher price and a lower interest rate?

Description : Which is a better car deal: a lower price and a higher interest rate, or a higher price and a lower interest rate?

Last Answer : answer:The taxes you pay are figured on the purchase price of the car, therefore it makes sense to have a lower price up front. In California, the sales tax is a substantial amount. Edit, there are ... unpaid balance type of loan, that way you can pay more on the principle and owe less in interest.

H2 is a better coolant than CO2 , due to it’s relatively (A) Lower density (B) Higher specific heat (C) Non-reactivity to uranium (D) Lower neutron capture cross-section

Description : H2 is a better coolant than CO2 , due to it’s relatively (A) Lower density (B) Higher specific heat (C) Non-reactivity to uranium (D) Lower neutron capture cross-section

Last Answer : (B) Higher specific heat

A backward feed multiple effect evaporator is better than forward feed for concentrating cold feed, because it provides (A) Higher economy (B) Lower capacity (C) Both (A) & (B) (D) Lower economy

Description : A backward feed multiple effect evaporator is better than forward feed for concentrating cold feed, because it provides (A) Higher economy (B) Lower capacity (C) Both (A) & (B) (D) Lower economy

Last Answer : (A) Higher economy

Tar is a better fuel than furnace oil, because of its (A) Higher calorific value (B) Lower sulphur content (C) Higher emissivity (0.8-0.9) resulting in higher radiation heat transfer rate (D) Both (A) and (B)

Description : Tar is a better fuel than furnace oil, because of its (A) Higher calorific value (B) Lower sulphur content (C) Higher emissivity (0.8-0.9) resulting in higher radiation heat transfer rate (D) Both (A) and (B)

Last Answer : (D) Both (A) and (B)

Combustion of pulverised coal compared to the lumpy coal (A) Provides better control of furnace temperature (B) Facilitates combustion with lower excess air (C) Provides higher thermal efficiency & flame temperature (D) All (A), (B) & (C)

Description : Combustion of pulverised coal compared to the lumpy coal (A) Provides better control of furnace temperature (B) Facilitates combustion with lower excess air (C) Provides higher thermal efficiency & flame temperature (D) All (A), (B) & (C)

Last Answer : (D) All (A), (B) & (C)

Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its (A) Emissivity factor is higher (B) Sulphur content is lower (C) Flue gas has lower dew point thereby facilitating more waste heat recovery (D) All (A), (B) and (C)

Description : Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its (A) Emissivity factor is higher (B) Sulphur content is lower (C) Flue gas has lower dew point thereby facilitating more waste heat recovery (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

For manometer, a better liquid combination is one having (A) Higher surface tension (B) Lower surface tension (C) Surface tension is no criterion (D) High density and viscosity

Description : For manometer, a better liquid combination is one having (A) Higher surface tension (B) Lower surface tension (C) Surface tension is no criterion (D) High density and viscosity

Last Answer : Answer: Option A

Pick up the correct statement from the following: (A) The free quartz suddenly expands at a temperature lower than 600°C (B) The lime stone resists fire upto about 800°C and at higher temperature it splits into CaO and CO2 (C) The sand stone with silicates resist a fire in a better way (D) All the above

Description : Pick up the correct statement from the following: (A) The free quartz suddenly expands at a temperature lower than 600°C (B) The lime stone resists fire upto about 800°C and at higher temperature it splits into ... (C) The sand stone with silicates resist a fire in a better way (D) All the above

Last Answer : Answer: Option D

Ms. Matthews is printing posters of her students' artwork. Since the images will be printed, they will need: A. a higher resolution for better print quality. B. a lower resolution for smaller file size. C. a higher resolution to display on a monitor. D. a lower resolution in order to download faster.

Description : Ms. Matthews is printing posters of her students' artwork. Since the images will be printed, they will need: A. a higher resolution for better print quality. B. a lower resolution for smaller ... a higher resolution to display on a monitor. D. a lower resolution in order to download faster.

Last Answer : A. a higher resolution for better print quality.

Intermediaries sponsor their own brands because ________. A. private-label brands sell at higher volumes B. private-label brands are recognizable to the consumer as being widely available from many different retailers C. private-label brands are always of better quality than national brands D. private-label brands can be sold at lower prices yet generate a higher profit margin because of their lower cost structure

Description : Intermediaries sponsor their own brands because ________. A. private-label brands sell at higher volumes B. private-label brands are recognizable to the consumer as being widely available from many ... sold at lower prices yet generate a higher profit margin because of their lower cost structure

Last Answer : D. private-label brands can be sold at lower prices yet generate a higher profit margin because of their lower cost structure

I inherited a bunch, I mean three boxes full, of 78 rpm records....any ideas what I should or could do with them??? I do have an old gramaphone, but I don't have enough room for ALL these records.

Description : I inherited a bunch, I mean three boxes full, of 78 rpm records....any ideas what I should or could do with them??? I do have an old gramaphone, but I don't have enough room for ALL these records.

Last Answer : I bet you would be able to sell them to collector's quite easily. Alternatively, if you really don't want them and they're just going to end up as clutter, perhaps you could see if there are any charities ... Oxfam in the UK have a program that lets you do that, but I don't know where you're based

Artificial selection to obtain cows yielding higher milk output represents : (1) Directional as it pushes the mean of the character in one direction (2) Disruptive as it splits the population into two, one yielding higher output and the other lower output (3) Stabilizing followed by disruptive as it stabilizes the population to produce higher yielding cows (4) Stabilizing selection as it stabilizes this character in the population

Description : Artificial selection to obtain cows yielding higher milk output represents : (1) Directional as it pushes the mean of the character in one direction (2) Disruptive as it splits the ... produce higher yielding cows (4) Stabilizing selection as it stabilizes this character in the population

Last Answer : (1) Directional as it pushes the mean of the character in one direction

A 3 phase 50 Hz induction motor has full load speed of 970 rpm. Calculate no of poles and slip frequency.

Description : A 3 phase 50 Hz induction motor has full load speed of 970 rpm. Calculate no of poles and slip frequency.

Last Answer : The number of poles in an induction motor can be calculated using the following formula: No. of poles = (120 * frequency) / speed In this case, the number of poles would be calculated as follows: No. of poles = ( ... ) - 50 Hz = 8.08 Hz So the motor has 6 poles and a slip frequency of 8.08 Hz.

How do I convert RPM to RCF?

Description : How do I convert RPM to RCF?

Last Answer : GQ. I have never tried this, but I’m guessing the center of the sample would give you the g on the entire sample.

Why does my motorcycle ride differently after i hit a high RPM?

Description : Why does my motorcycle ride differently after i hit a high RPM?

Last Answer : Are you in the same gear at the same speed. Usually if you are accelerating, you are in a lower gear. Once you get up to speed, it is easy to stay in the higher gear as you are slowing down ... the throttle in high gear from 40 mph it will sound like your engine is laboring. Make sure to downshift.

What is a safe RPM to make my upshift on a motorcycle?

Description : What is a safe RPM to make my upshift on a motorcycle?

Last Answer : Don’t lug. Stay in a lower gear. Make 5,000 redline.

An electric motor drives a windless which hauls up a crate A of weight W = 500 kg up an inclined plane through a height of 10 m in 2 minutes. The torque acting on the windless is 25 kgm and the drum of the windless makes 30 rpm. The efficiency of the inclined plane would be a.0.41 b.0.61 c.0.265 d.0.5305 e.0.66

Description : An electric motor drives a windless which hauls up a crate A of weight W = 500 kg up an inclined plane through a height of 10 m in 2 minutes. The torque acting on the windless is 25 kgm and the drum of the ... The efficiency of the inclined plane would be a.0.41 b.0.61 c.0.265 d.0.5305 e.0.66

Last Answer : d. 0.5305

A grinding wheel rotates at 3000 rpm. When power supply is cut off the wheel stops in 5 sec. The number of revolutions made by the wheel before coming to rest would be a.500 b.107 dynes c.250 d.3000 e.1000

Description : A grinding wheel rotates at 3000 rpm. When power supply is cut off the wheel stops in 5 sec. The number of revolutions made by the wheel before coming to rest would be a.500 b.107 dynes c.250 d.3000 e.1000

Last Answer : c. 250

A flywheel 200 cm in diameter is rotating at 100 rpm. A point on the rim of the flywheel will not have a.angular velocity b.centripental acceleration c.tangential acceleration d.all of the above e.107 dynes

Description : A flywheel 200 cm in diameter is rotating at 100 rpm. A point on the rim of the flywheel will not have a.angular velocity b.centripental acceleration c.tangential acceleration d.all of the above e.107 dynes

Last Answer : c. tangential acceleration

A grinding wheel rotates at 3000 rpm. When power supply is cut-off the wheel stops in 10 seconds. The number of revolutions made by the wheel before coming to rest would be a.1500 b.3000 c.1000 d.250 e.500

Description : A grinding wheel rotates at 3000 rpm. When power supply is cut-off the wheel stops in 10 seconds. The number of revolutions made by the wheel before coming to rest would be a.1500 b.3000 c.1000 d.250 e.500

Last Answer : d. 250

A wheel 8 mts in diameter coasts to rest from a speed of 800 rpm in 10 minutes. Its angular deceleration is a.308/min2 b.683 rad/min2 c.502 rad/min2 d.107 dynes e.809 rad/min2

Description : A wheel 8 mts in diameter coasts to rest from a speed of 800 rpm in 10 minutes. Its angular deceleration is a.308/min2 b.683 rad/min2 c.502 rad/min2 d.107 dynes e.809 rad/min2

Last Answer : c. 502 rad/min2

In a slider crank mechanism, the crank is rotating at 200 rpm. If length of connecting rod is 8 mts and crank shaft is 2 mts, velocity of crosshead at 30? rotation of crank shaft equals. a.30.2 m/s b.33.2 m/s c.35.8 mts/s d.107 dynes e.25.5 m/s

Description : In a slider crank mechanism, the crank is rotating at 200 rpm. If length of connecting rod is 8 mts and crank shaft is 2 mts, velocity of crosshead at 30? rotation of crank shaft equals. a.30.2 m/s b.33.2 m/s c.35.8 mts/s d.107 dynes e.25.5 m/s

Last Answer : e. 25.5 m/s

If a particle charges its angular velocity from 30 to 35 rpm in 20 seconds then it has angular acceleration of a.107 dynes b.30 rev/min2 c.10 rev/min2 d.20 rev/min2 e.15 rev/min2

Description : If a particle charges its angular velocity from 30 to 35 rpm in 20 seconds then it has angular acceleration of a.107 dynes b.30 rev/min2 c.10 rev/min2 d.20 rev/min2 e.15 rev/min2

Last Answer : e. 15 rev/min2

A grinding wheel is rotating at 3000 rpm. When the switch is turned off the wheel stops in 10 seconds. The uniform deceleration of the wheel was a.1 rad/s2 b.31.4 rad/s2 c.4 rad/s2 d.62.8 rad/s2 e.10.4 rad/s2

Description : A grinding wheel is rotating at 3000 rpm. When the switch is turned off the wheel stops in 10 seconds. The uniform deceleration of the wheel was a.1 rad/s2 b.31.4 rad/s2 c.4 rad/s2 d.62.8 rad/s2 e.10.4 rad/s2

Last Answer : b. 31.4 rad/s2

What is the total acceleration of a point on the rim of a flywheel 4 mts in diameter 0.6 see after it has started from rest if it accelarates uniformly from rest to 2000 rpm in 20 secs. a.68.9 mts/sec2 b.102.6 mts/sec2 c.78.94 mts/sec2 d.107 dynes e.33.2 mts/sec2

Description : What is the total acceleration of a point on the rim of a flywheel 4 mts in diameter 0.6 see after it has started from rest if it accelarates uniformly from rest to 2000 rpm in 20 secs. a.68.9 mts/sec2 b.102.6 mts/sec2 c.78.94 mts/sec2 d.107 dynes e.33.2 mts/sec2

Last Answer : c. 78.94 mts/sec2

A flywheel starting from rest and accelerating uniformly performs 25 revolutions in 5 sec. Its angular velocity in rpm after 10 seconds would be a.50 rpm b.20 rpm c.25 rpm d.60 rpm e.45 rpm

Description : A flywheel starting from rest and accelerating uniformly performs 25 revolutions in 5 sec. Its angular velocity in rpm after 10 seconds would be a.50 rpm b.20 rpm c.25 rpm d.60 rpm e.45 rpm

Last Answer : b. 20 rpm

A flywheel 200 cm in diameter is rotating at 100 rpm. A point one the rim of the flywheel will not have a.angular velocity b.centripetal acceleration c.tangential acceleration d.all of the above e.107 dynes

Description : A flywheel 200 cm in diameter is rotating at 100 rpm. A point one the rim of the flywheel will not have a.angular velocity b.centripetal acceleration c.tangential acceleration d.all of the above e.107 dynes

Last Answer : a. angular velocity

A 100 kg flywheel having a radius of gyration of 1 m is rotating at 1000 rpm. The angular momentum of the flywheel about its axis of rotation, in kg m2/s is a.1000 b.107 dynes c.10000 d.10470 e.5235

Description : A 100 kg flywheel having a radius of gyration of 1 m is rotating at 1000 rpm. The angular momentum of the flywheel about its axis of rotation, in kg m2/s is a.1000 b.107 dynes c.10000 d.10470 e.5235

Last Answer : d. 10470

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

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

Last Answer : The full form of 'RPM' is Revolutions Per Minute

What is the full form of RPM ?

Description : What is the full form of RPM ?

Last Answer : RPM full version Revolution Pre Minute.

What is the full form of RPM ?

Last Answer : RPM - Revolutions Per Minute

What is the full form of RPM ?

Last Answer : Revolutions Per Minute

What are CPC, CTR, RPM ?

Description : adsense Of This Things Actually What ?

Last Answer : CTR => a Of the blog Total Page Views In How many? Page In advertising Click Done That is by Page CTR Meaning Is. RPM => a On the blog Per 1000 Page View Of For What? Quantity Income ... => Yours Of advertising Of every click Because AdSense To you How much? Dollars Payment Will That Meaning Is.

What's the normal idle RPM of a scooter?

Description : What's the normal idle RPM of a scooter?

Last Answer : Dear, The normal idle Rpm of the scooter is nearly 2000 Rpm, but it varies according to the CC of the scooter. More CC means more Idle rpm in the scooter..

If pulley a turn clockwise at 15 rpm how fast and what direction will pulley b turn?

Description : If pulley a turn clockwise at 15 rpm how fast and what direction will pulley b turn?

Last Answer : A simple enough question, but complicated by so many possible variations. For instance, place two cog wheels together so that their teeth mesh. Turn cog A clockwise and cog B will turn anticlockwise ( ... of travel (RPM) would depends on the diametres of the pulley wheels - variations once more!

When engine is at 1000 RPM at what rpm is the mechanical distributor?

Description : When engine is at 1000 RPM at what rpm is the mechanical distributor?

Last Answer : Need answer

Why does my 2004 Xterra stall when put in gear It Starts idling at 1200 rpm after 15 min it idles down and drives fine?

Description : Why does my 2004 Xterra stall when put in gear It Starts idling at 1200 rpm after 15 min it idles down and drives fine?

Last Answer : Look for a vacuum leak.

Is it best to get a turntable with one speed, 33.3 RPM, or one with an additonal speed as well?

Description : Is it best to get a turntable with one speed, 33.3 RPM, or one with an additonal speed as well?

Last Answer : Is better to have a turn table with different speed options, you can mix music/vinyls that have different speeds.

determine the speed of rotation of a 20 tooth gear when it is driven by a 40 tooth gear and rotating at 10 rpm?

Description : determine the speed of rotation of a 20 tooth gear when it is driven by a 40 tooth gear and rotating at 10 rpm?

Last Answer : i am the one that asked i dont know the answer

Whenthecrankshaft of 4-stroke running at 1500 rpm thecamshaftwillrun at A. 3000 rpm B. 6000 rpm C. 1500 rpm D. 750 rpm

Description : Whenthecrankshaft of 4-stroke running at 1500 rpm thecamshaftwillrun at A. 3000 rpm B. 6000 rpm C. 1500 rpm D. 750 rpm

Last Answer : ANSWER : D

A 4S diesel engine, when running at 2000 rpm has an injection duration of 1.5 ms.What is the corresponding of the crank angle in degrees? (a) 18° (b) 9° (c)36° (d) 15°

Description : A 4S diesel engine, when running at 2000 rpm has an injection duration of 1.5 ms.What is the corresponding of the crank angle in degrees? (a) 18° (b) 9° (c)36° (d) 15°

Last Answer : Ans :a

A two stroke engine has a speed of 750 rpm. A four stroke engine having an identical cylinder size runs at 1500 rpm. The theoretical output of the two stroke engine will (a) Be twice that of the four stroke engine (b) Be half that of the four stroke engine (c) Be the same as that of the four stoke (d) Depend upon whether it is a CI or SI engine

Description : A two stroke engine has a speed of 750 rpm. A four stroke engine having an identical cylinder size runs at 1500 rpm. The theoretical output of the two stroke engine will (a) Be twice that of the four stroke ... ) Be the same as that of the four stoke (d) Depend upon whether it is a CI or SI engine

Last Answer : Ans :c

Piston speed is equal to a. stroke x rpm b. (stroke x rpm) / 2 c. 2 x stroke x rpm d. 4 x stroke x rpm

Description : Piston speed is equal to a. stroke x rpm b. (stroke x rpm) / 2 c. 2 x stroke x rpm d. 4 x stroke x rpm

Last Answer : ANSWER c. 2 x stroke x rpm

Detonation can be controlled by a. varying the compression ratio b. using lean mixture c. retarding the spark timing d. reducing the rpm

Description : Detonation can be controlled by a. varying the compression ratio b. using lean mixture c. retarding the spark timing d. reducing the rpm

Last Answer : ANSWER c. retarding the spark timing

Which of the following statements is correct concerning the motor performance curves and data table shown in the illustration? EL-0006 A. The motor RPM at full load is 1737 RPM. B. The motor draws 12.62 kw from the switchboard when operating at full load. C. If the motor was developing 10 HP its power factor would be 0.92. D. All of the above.

Description : Which of the following statements is correct concerning the motor performance curves and data table shown in the illustration? EL-0006 A. The motor RPM at full load is 1737 RPM. B. The motor draws 12.62 kw ... If the motor was developing 10 HP its power factor would be 0.92. D. All of the above.

Last Answer : Answer: D

A four pole turbogenerator is used in conjunction with a 160 pole propulsion motor. If the generator is turning at 3,200 RPM, what is the current speed of the propeller? A. 40 RPM B. 60 RPM C. 80 RPM D. 100 RPM

Description : A four pole turbogenerator is used in conjunction with a 160 pole propulsion motor. If the generator is turning at 3,200 RPM, what is the current speed of the propeller? A. 40 RPM B. 60 RPM C. 80 RPM D. 100 RPM

Last Answer : Answer: C