101.
Forging lubricants are:
A
graphite based
B
oil based
C
water based
D
lead based
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Forging lubricants are:
graphite based
oil based
water based
lead based
Forging is done when the metal is in
None of the above
Liquid condition
Plastic condition
Elastic condition
Forging is done at
None of the above
the melting point of the metal
below the melting point of the metal
above the melting point of the metal
Forging as a process is closely related to:
blacksmithing
welding
machining
casting
Flash refers to:
part ejection
the closing of the dies
excess metal flowing out of a die
fuming of the lubricant
Cast iron cannot be forged because it has the property of
Brittleness
Softness
Stiffness
Toughness
Anvil is a
Light block of aluminium
Heavy block of cast steel
Heavy block of mild steel
Heavy block of high carbon steel
Another name for closed die forging is:
hammering
impression forging
drop forging
cast forging
A high speed steel has to be forged. Which colour indicates the most suitable forging temperature ?
Yellow
Light yellow
Dark cherry red
White
A high carbon steel has to be forged. Which colour indicates the most suitable forging temperature ?
Light yellow
Yellow
Dark cherry red
White
The incremental encoder is capable of sensing
direction of movement of the table
direction of rotation of the lead screw
direction of rotation of the motor
none of the above
The function of the tachogenerator is
reduction of basic length unit
faster response of the motor
to make 3-D interpolation possible
none of the above
On the CNC lathe
2-D programming is sufficient
3-D programming is necessary
1-D programming is sufficient
none of the above
Interpolator is present in case of
Point-to-point open loop system
point-to-point closed loop system
contouring control system
none of the above
In order to produce a circular group in milling in CNC machining centre
a universal dividing head is necessary
a planetary gear mechanism which actuates the table moment
a rotary table is necessary
none of the above
In computer-controlled machine tools, tool movements are controlled by
Cam
machine operator
foolproof mechanism
none of the above
In computer controlled machine tools terminal clergy, machining centre is
the origin of the machine coordinate system with respect to which the operator has to make his program
the centre of the cutter which actually goes to the programmed point when used without radius compensation
a computer-controlled machine tool capable of a variety of operations involving rotating cutters
none of the above
In a point-to-point feed axis employing a stepper motor as a prime mover
an encoder for position feedback is a must
an interpolator is a must
a tachogenerator is a must
none of the above
In a CNC turning centres, threads of different pitches are cut by
Different settings of the meander drive and Norton Tumbler gears
Different settings of the feed gearbox
Different settings of the speed gearbox
none of the above
What is the purpose of using recirculating ball screw nut mechanism in CNC machine
to reduce the setup time
for higher surface finish
for carrying out up-milling
to remove backlash