55 practice sets · Page 3 of 3
The ram holding the tool gets _____ movement.
none of the mentioned
both rotary and reciprocating
rotary
reciprocating
Correct Answer: D — reciprocating
Explanation:
It gets reciprocating movement.Rotary motion is something like wheel turning and reciprocating motion means back and forth linear mtioon.
The change of the movement of the drive is done by the mechanism contained within the _____ of the machine.
crossrail
column
toolhead
none of the mentioned
Correct Answer: B — column
Explanation:
It is the function of column. Column is a part of shaper which is mounted on the base.
The usual size of shaper varies from _____ mm.
25 to 60
75 to 90
175 to 900
125 to 600
Correct Answer: C — 175 to 900
Explanation:
The usual size of shaper ranges from 175 mm to 900 mm basede upon its application and working.
The size of a shaper is given by the maximum stroke length of the ram in mm.
True
False
Correct Answer: A — True
Explanation:
It is the property of shaper. Here the ram is the reciprocating member of the shaper.
In a shaper_____ movement of the drive is converted into _____ movement.
reciprocating, rotary
rotary, rotary
none of the mentioned
rotary, reciprocating
Correct Answer: D — rotary, reciprocating
Explanation:
Rotary movement of the drive is converted into reciprocating movement.Rotary motion is something like wheel turning and reciprocating motion means back and forth linear mtioon.
Feed is expressed in _______
mm/minute
none of the mentioned
minute
mm
Correct Answer: D — mm
Explanation:
It is expressed in mm. Feed is simply a distance so it unit should be the unit of distance.
The feed is always given at the ______ of the return stroke.
none of the mentioned
both at the starting and at the end
end
starting
Correct Answer: C — end
Explanation:
It is always given at the end of the return stroke because only in the forward stroke useful work is done.
Feed is always given when the tool is cutting the metal.
False
True
Correct Answer: A — False
Explanation:
This is false. The feed is always given when the tool is not cutting the metal.
If n=number of strokes of the ram per minute or rpm of the bull wheel, l=length of the cutting stroke in mm, m= the ratio between return time to cutting time, then find the formula for cutting stroke.
nlm / 100
none of the mentioned
(lm) / (n100)
nl(m+1) / 100
Correct Answer: D — nl(m+1) / 100
Explanation:
(nl (m+1)) – It is the right formula for calculating the cutting speed.
Cutting speed= (length of the cutting stroke) / (time required by the cutting stroke).
False
True
Correct Answer: B — True
Explanation:
It is the formula for calculating the cutting speed.It may be expressed as length (distance) / time.
Calculation of cutting speed is quite difficult in shaper compare to others.
True
False
Correct Answer: A — True
Explanation:
It is quite difficult to calculate cutting speed as we have to measure the time required by the cutting stroke.
What is the unit of cutting speed?
none of the mentioned
meter
meter/minute
meter2 /minute
Correct Answer: C — meter/minute
Explanation:
Cutting speed is simply a speed. So its unit should be the unit of time. Here, meter/minute is more appropriate unit for cutting speed.
In shaper, cutting speed is expressed only in ______ stroke.
forward
both forward and return
return
none of the mentioned
Correct Answer: A — forward
Explanation:
Only in forward stroke, cutting speed is expressed because only in forward stroke useful work is done.
The cutting action in shaper is intermittent.
False
True
Correct Answer: B — True
Explanation:
As per the definition of this machine. The shaper is a reciprocating machine which works only in forward stroke.
Which type of cutting parameters are there in shaper?
depth of cut
feed
all of the mentioned
machining time
Correct Answer: C — all of the mentioned
Explanation:
Feed, depth of cut, machining time all are cutting parameters. Apart from these, cutting speed and metal removal rate are also termed as cutting parameters.
