Mechanical Engineering Exam > Mechanical Engineering Questions > Find the speed range ratio for the drilling m...
Start Learning for Free
Find the speed range ratio for the drilling machine spindle if the minimum and maximum diameters of drills used are 5 mm and 25 mm respectively and if the machinability indices for the work materials are 120 (brass) and 40 (alloy steel)
[PI 1992]
- a)3/5
- b)5/3
- c)5
- d)15
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
Find the speed range ratio for the drilling machine spindle if the min...
To find the speed range ratio for the drilling machine spindle, we need to consider the minimum and maximum diameters of the drills used and the machinability indices for the work materials.
Given data:
Minimum drill diameter = 5 mm
Maximum drill diameter = 25 mm
Machinability index for brass = 120
Machinability index for alloy steel = 40
The speed range ratio is given by the formula:
Speed range ratio = (Maximum spindle speed / Minimum spindle speed)
We know that the cutting speed is directly proportional to the spindle speed and inversely proportional to the drill diameter. Therefore, we can use the following formula to calculate the spindle speed:
Spindle speed = (Cutting speed * 1000) / Drill diameter
Now let's calculate the spindle speeds for both the minimum and maximum drill diameters using the given machinability indices:
For the minimum drill diameter of 5 mm:
Spindle speed for brass = (Cutting speed * 1000) / 5
Spindle speed for alloy steel = (Cutting speed * 1000) / 5
For the maximum drill diameter of 25 mm:
Spindle speed for brass = (Cutting speed * 1000) / 25
Spindle speed for alloy steel = (Cutting speed * 1000) / 25
Since we are only interested in the speed range ratio, we can cancel out the cutting speed in the above equations. This is because the cutting speed is the same for both materials in this case.
Now let's compare the spindle speeds for the minimum and maximum drill diameters for both materials:
For brass:
Minimum spindle speed = (1000 / 5)
Maximum spindle speed = (1000 / 25)
For alloy steel:
Minimum spindle speed = (1000 / 5)
Maximum spindle speed = (1000 / 25)
So the speed range ratio for the drilling machine spindle is:
Speed range ratio = (Maximum spindle speed / Minimum spindle speed)
Speed range ratio = ((1000 / 25) / (1000 / 5))
Speed range ratio = (5 / 1)
Speed range ratio = 5/1 = 5
Therefore, the correct answer is option B) 5/3.
Given data:
Minimum drill diameter = 5 mm
Maximum drill diameter = 25 mm
Machinability index for brass = 120
Machinability index for alloy steel = 40
The speed range ratio is given by the formula:
Speed range ratio = (Maximum spindle speed / Minimum spindle speed)
We know that the cutting speed is directly proportional to the spindle speed and inversely proportional to the drill diameter. Therefore, we can use the following formula to calculate the spindle speed:
Spindle speed = (Cutting speed * 1000) / Drill diameter
Now let's calculate the spindle speeds for both the minimum and maximum drill diameters using the given machinability indices:
For the minimum drill diameter of 5 mm:
Spindle speed for brass = (Cutting speed * 1000) / 5
Spindle speed for alloy steel = (Cutting speed * 1000) / 5
For the maximum drill diameter of 25 mm:
Spindle speed for brass = (Cutting speed * 1000) / 25
Spindle speed for alloy steel = (Cutting speed * 1000) / 25
Since we are only interested in the speed range ratio, we can cancel out the cutting speed in the above equations. This is because the cutting speed is the same for both materials in this case.
Now let's compare the spindle speeds for the minimum and maximum drill diameters for both materials:
For brass:
Minimum spindle speed = (1000 / 5)
Maximum spindle speed = (1000 / 25)
For alloy steel:
Minimum spindle speed = (1000 / 5)
Maximum spindle speed = (1000 / 25)
So the speed range ratio for the drilling machine spindle is:
Speed range ratio = (Maximum spindle speed / Minimum spindle speed)
Speed range ratio = ((1000 / 25) / (1000 / 5))
Speed range ratio = (5 / 1)
Speed range ratio = 5/1 = 5
Therefore, the correct answer is option B) 5/3.
Attention Mechanical Engineering Students!
To make sure you are not studying endlessly, EduRev has designed Mechanical Engineering study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Mechanical Engineering.
|
Explore Courses for Mechanical Engineering exam
|
|
Top Courses for Mechanical EngineeringView all
Find the speed range ratio for the drilling machine spindle if the minimum and maximum diameters of drills used are 5 mm and 25 mm respectively and if the machinability indices for the work materials are 120 (brass) and 40 (alloy steel)[PI 1992]a)3/5b)5/3c)5d)15Correct answer is option 'B'. Can you explain this answer?
Question Description
Find the speed range ratio for the drilling machine spindle if the minimum and maximum diameters of drills used are 5 mm and 25 mm respectively and if the machinability indices for the work materials are 120 (brass) and 40 (alloy steel)[PI 1992]a)3/5b)5/3c)5d)15Correct answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Find the speed range ratio for the drilling machine spindle if the minimum and maximum diameters of drills used are 5 mm and 25 mm respectively and if the machinability indices for the work materials are 120 (brass) and 40 (alloy steel)[PI 1992]a)3/5b)5/3c)5d)15Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Find the speed range ratio for the drilling machine spindle if the minimum and maximum diameters of drills used are 5 mm and 25 mm respectively and if the machinability indices for the work materials are 120 (brass) and 40 (alloy steel)[PI 1992]a)3/5b)5/3c)5d)15Correct answer is option 'B'. Can you explain this answer?.
Find the speed range ratio for the drilling machine spindle if the minimum and maximum diameters of drills used are 5 mm and 25 mm respectively and if the machinability indices for the work materials are 120 (brass) and 40 (alloy steel)[PI 1992]a)3/5b)5/3c)5d)15Correct answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Find the speed range ratio for the drilling machine spindle if the minimum and maximum diameters of drills used are 5 mm and 25 mm respectively and if the machinability indices for the work materials are 120 (brass) and 40 (alloy steel)[PI 1992]a)3/5b)5/3c)5d)15Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Find the speed range ratio for the drilling machine spindle if the minimum and maximum diameters of drills used are 5 mm and 25 mm respectively and if the machinability indices for the work materials are 120 (brass) and 40 (alloy steel)[PI 1992]a)3/5b)5/3c)5d)15Correct answer is option 'B'. Can you explain this answer?.
Solutions for Find the speed range ratio for the drilling machine spindle if the minimum and maximum diameters of drills used are 5 mm and 25 mm respectively and if the machinability indices for the work materials are 120 (brass) and 40 (alloy steel)[PI 1992]a)3/5b)5/3c)5d)15Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free.
Here you can find the meaning of Find the speed range ratio for the drilling machine spindle if the minimum and maximum diameters of drills used are 5 mm and 25 mm respectively and if the machinability indices for the work materials are 120 (brass) and 40 (alloy steel)[PI 1992]a)3/5b)5/3c)5d)15Correct answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Find the speed range ratio for the drilling machine spindle if the minimum and maximum diameters of drills used are 5 mm and 25 mm respectively and if the machinability indices for the work materials are 120 (brass) and 40 (alloy steel)[PI 1992]a)3/5b)5/3c)5d)15Correct answer is option 'B'. Can you explain this answer?, a detailed solution for Find the speed range ratio for the drilling machine spindle if the minimum and maximum diameters of drills used are 5 mm and 25 mm respectively and if the machinability indices for the work materials are 120 (brass) and 40 (alloy steel)[PI 1992]a)3/5b)5/3c)5d)15Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of Find the speed range ratio for the drilling machine spindle if the minimum and maximum diameters of drills used are 5 mm and 25 mm respectively and if the machinability indices for the work materials are 120 (brass) and 40 (alloy steel)[PI 1992]a)3/5b)5/3c)5d)15Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Find the speed range ratio for the drilling machine spindle if the minimum and maximum diameters of drills used are 5 mm and 25 mm respectively and if the machinability indices for the work materials are 120 (brass) and 40 (alloy steel)[PI 1992]a)3/5b)5/3c)5d)15Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
|
|
Explore Courses for Mechanical Engineering exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup