This set of Machine Tools Multiple Choice Questions & Answers (MCQs) focuses on “Numericals on Shaper Machine”
1. If the length of the cutting stroke is 10 mm and time required by the cutting stroke is 5 second, then find the value of cutting speed in mm/second.
a) 2
b) 0.5
c) 4
d) none of the mentioned
View Answer
Explanation: C.S.=length / time. Here, length is 10 mm and time is 5 second. So by dividing 10 by 5 we can easily get the answer as 2.
2. If l=5, b=5, t=0.4, v=3 and m= 2. Find the value of s. l=length of the cutting stroke in mm, b=width of the work in mm, s=feed in mm, v=cutting speed in mm/minute, m=the ratio between return time to cutting time and t=machining time in minute.
a) 0.025
b) 0.0125
c) 0.00625
d) none of the mentioned
View Answer
Explanation: From the formula, t= l*b*(m+1) / (1000*v*s). By putting all given values, we can easily get answer as 0.00625.
3. If n=rpm of the bull wheel=2, l= length of the cutting stroke in mm=2.5mm and cutting speed = 0.5 mm/minute. m= the ratio between return time to cutting time. Then find the value of m.
a) 10
b) 9
c) 100
d) 99
View Answer
Explanation: C.S. = n*l* (1+m) / 100. Here, n=2, l=2.5, cs=0.5 and m can be found by putting these values in the above equation.
4. If n=rpm of the bull wheel=4 ,cs =cutting speed=3mm/minute and m= the ratio between return time to cutting time= 5. Then find the value of length of cutting stroke (l) in mm.
a) 25
b) 50
c) 12.5
d) 6.24
View Answer
Explanation: C.S. = n*l* (1+m) / 100. Here, n=4, cs=3, m=5 and l can be found out by putting these values in above equation.
5. If l=9, b=5, s=3, v=2 and t=0. 0375. Find the value of m. l=length of the cutting stroke in mm, b=width of the work in mm, s=feed in mm, v=cutting speed in mm/minute, m=the ratio between return time to cutting time and t=machining time in minute.
a) 2
b) 5
c) 10
d) none of the mentioned
View Answer
Explanation: From the formula, t= l*b*(m+1) / (1000*v*s) , m should be 4.
6. If n=rpm of the bull wheel, cs =cutting speed=3.2mm/minute and m= the ratio between return time to cutting time= 3 and l=length of cutting stroke (l)=8mm. Find the value of n.
a) 2
b) 5
c) 12
d) none of the mentioned
View Answer
Explanation: C.S. = n*l* (1+m) / 100 and value of n should be 10 by putting all parameters in above equation.
7. If l=10, b=5, s=4, v=3 and m= 2. Find the value of t. l=length of the cutting stroke in mm, b=width of the work in mm, s=feed in mm, v=cutting speed in mm/minute, m=the ratio between return time to cutting time and t=machining time in minute.
a) 0.025
b) 0.0125
c) 0.00625
d) none of the mentioned
View Answer
Explanation: From the formula, t= l*b*(m+1) / (1000*v*s), we can easily calculate the value of t by putting all these values in given equations.
8. If l=15, b=4, s=3, m=2 and t= 1. Find the value of v. l=length of the cutting stroke in mm, b=width of the work in mm, s=feed in mm, v=cutting speed in mm/minute, m=the ratio between return time to cutting time and t=machining time in minute.
a) 0.06
b) 0.03
c) 0.12
d) none of the mentioned
View Answer
Explanation: From the formula, t= l*b*(m+1) / (1000*v*s). From this equation, we can easily calculate the value of v by putting all mentioned values.
9. If n=rpm of the bull wheel=2, l= length of the cutting stroke in mm=3mm and m= the ratio between return time to cutting time= 5. Then find the value of cutting speed in mm/minute.
a) 0.3
b) 0.36
c) 0.15
d) 0.18
View Answer
Explanation: C.S. = n*l* (1+m) / 100. Here l=3mm, n=2, m=5. So by putting these values in the above equation we can easily get the answer as 0.36.
10. If l=20, t=5, s=4, v=3 and m= 2. Find the value of b. l=length of the cutting stroke in mm, b=width of the work in mm, s=feed in mm, v=cutting speed in mm/minute, m=the ratio between return time to cutting time and t=machining time in minute.
a) 100
b) 1000
c) 10000
d) none of the mentioned
View Answer
Explanation: From the formula, t= l*b*(m+1) / (1000*v*s). We can get the value of b by putting all mentioned values in the given equation.
11. If t=0.10, b=5, s=4, v=1 and m= 2. Find the value of l. l=length of the cutting stroke in mm, b=width of the work in mm, s=feed in mm, v=cutting speed in mm/minute, m=the ratio between return time to cutting time and t=machining time in minute.
a) 26.66
b) 53.33
c) 13.33
d) none of the mentioned
View Answer
Explanation: From the formula, t= l*b*(m+1) / (1000*v*s). We can get the value of l by putting all the values in the given equation.
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