1. the part programme is stored in computer accuracy
2. the part programme can be easily checked and corrected in the former
3. data tape in case of NC system cannot be reused, whereas disc in CNC system can be reused
4. all of these
all of these
1. reduced the infallibility of the operator
2. relieved the operator from constant supervision
3. inhanced quantity and accuracy of the work
4. all of these
all of these
1. tape is used as storage device for part programme in the former whereas computer is used in the later
2. the former does not allow integration of various machining processes, whereas the later allows to do so
3. the former is altogether a hardware system, whereas the later is a software system
4. all of these
all of these
1. size of computer in DNC system is much smaller than that of CNC system
2. size of computer used in CNC system is restricted by cost consideration which is not true in case of DNC
3. DNC system operates in a time share made whereas CNC system operates on dedicated on line system mode
4. All of these
All of these
1. 1 to 5 mm
2. 5 to 15 mm
3. 15 to 25 mm
4. more that 25 mm
5 to 15 mm
1. done to a single V or U-groove done to a single V or U-groove done to a double V or U-groove on one side done to a double Vor U-groove on both sides is not required
2. done to a double V or U-groove on one side
3. done to a double Vor U-groove on both sides
4. is not required
is not required
1. is done to a single V or U-groove
2. is done to a double V or U- groove on one side
3. is done to a double V or U- groove on both sides
4. is not required
is done to a double V or U- groove on both sides
1. 400 to 500
2. 500 to600
3. 600 to 700
4. 700 to 900
700 to 900
1. permit perfect cohesion of metals
2. remove the oxides of the metals formed at high temperature
3. both (a) and (c)
4. none of these
both (a) and (c)
1. 25 mm
2. 40 mm
3. 50 mm
4. 100 mm
25 mm