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Question
WHAT IS THE DIFFERENCE BETWEEN RATED SPEED AND ECONOMIC 
SPEED?
 Question Submitted By :: Mechanical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
THE RATED SPEED TELLS US ABOUT THE MAXIMUM SPEED WHICH CAN
BE ACHIEVED BY A VEHICLE OR SOME OTHER MACHINE BUT THE
ECONOMICAL SPEED MEANS THE SPEED LIMIT AT WHICH THE MACHINE
WORKS EFFICIENTLY WITH LEAST CONSUMPTION OF FUEL.EG-
IN NORMAL BIKES(NOT RACING),THE MAX.SPEED LIMIT SHOWN ON
SPEEDOMETER IS UPTO 120 KMPH BUT COMPANIES ALWAYS ADVICE
THEIR CUSTOMERS TO DRIVE SUCH BIKES AT AROUND 60 KMPH TO
HAVE MAXIMUM MILEAGE
 
Is This Answer Correct ?    30 Yes 0 No
Harsimranjot Singh
 
Answer
# 2
THE RATED SPEED TELLS US ABOUT THE MAXIMUM SPEED WHICH CAN
BE ACHIEVED BY A VEHICLE OR SOME OTHER MACHINE BUT THE
ECONOMICAL SPEED MEANS THE SPEED LIMIT AT WHICH THE MACHINE
WORKS EFFICIENTLY WITH LEAST CONSUMPTION OF FUEL.
EG-in normal bike speed upto120km/hr is the rated speed.
& the speed shown in green colour is the ECONOMICAL SPEED
 
Is This Answer Correct ?    9 Yes 0 No
Arshad
 
 
 
Answer
# 3
rated speed is max speed at which machine can be operated
and economic speed is that speed at which the efficiency is max.
 
Is This Answer Correct ?    5 Yes 1 No
Praveen
 

 
 
 
Other Mechanical Engineering Interview Questions
 
  Question Asked @ Answers
 
what is the difference between dross and scale? Hindalco 1
Internal energy of a substance depends on Bhel 2
What is the purpose of thrust bearing? RRB 1
What is a liquid flooding in refrigeration system? RRB 1
why condensate pump can be used instead of feed pump?   1
we have read that when the piston goes up and down then the engine works i.e. the suction,compression etc etc. then what happens in the case of big vehicles, which start at stable condition, i.e. how does their piston moves when they are at rest. how suction,compression etc Bhel 4
Can anybody please provide any link to calculate force rquired to bend a metal sheet into pipe? or describe how is it calculated?   2
what is mean dual combustion turbocharged? CAT 2
Plz tell me how to prepare for RRB exams for section engg for mechanical and suggest me some books for that. RRB 2
what is the effect of reheat on rakine cycle? 1.efficiency increases 2.workt output increses 3. both 4. none of these. Jindal 4
The ability to draw wires is called HAL 14
Why tyres are manufactured in black colour? MRF 14
 
For more Mechanical Engineering Interview Questions Click Here 
 
 
 
 
 


   
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