Related Questions
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4
The height of each tooth of a broach is
B. In progressively decreasing order
C. In progressively increasing order
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4
The maximum possible draft in cold rolling of sheet increases with the
A. Increase in coefficient of friction
B. Decrease in coefficient of friction
C. Decrease in roll radius
D. Decrease in roll velocity
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4
If a gas metal arc process uses a low arc voltage and the arc is continuously interrupted as the molten electrode metal fills up the arc gap is known as
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4
In which of the following machine, the work rotates and the tool is stationary?
A. Vertical boring machine
B. Horizontal boring machine
C. Precision boring machine
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4
The abrasive recommended for grinding materials of high tensile strength is
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4
A tool used to withdraw a drill from the sleeve is called
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4
The chamfering is an essential operation after
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4
In ultrasonic machining, tool is made of
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4
In hot machining, the work is heated by
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4
The taper on the lathe spindle is
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4
The cutting speed for counter-boring should be _________ that of drilling operation.
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4
Hot rolling of mild steel is carried out
A. At recrystallization temperature
B. Between 100⁰C to 150⁰C
C. Between recrystallization temperature
D. Above recrystallization temperature
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4
The factor which affects the tool life is
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4
Slow speed of the spindle is necessary in
B. Turning a work of larger diameter
C. Turning a hard or tough material
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4
A CNC vertical milling machine has to cut a straight slot of 10 mm width and 2mm depth by a cutter of 10 mm diameter between points (0,0) and (100,100) on the XY plane (dimensions in mm). The feed rate used for milling is 50 mm/min, milling time for the slot (in seconds) is
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4
As the cutting speed increases, the tool cutting forces
D. First increases and then decreases
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4
The cutting speed for drilling aluminium, brass and bronze with carbon steel drills is _________ cutting speed for drilling mild steel with high speed steel drills.
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4
What is the type of welding defect caused due to shrinkage during solidification and by weld stresses called?
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4
Which one among the following welding processes uses nonconsumable electrode?
C. Gas tungsten arc welding
D. Flux coated arc welding
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4
What is the type of welding defect caused due to poor manipulation of weld rod or a dirty joint called?
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4
What is the method of brazing used to join relatively small assemblies made from materials that either do not oxidize at the brazing temperature or can be protected from oxidation with a flux?
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4
If the helix angle of the drill is made _________ 30°, then the torque required to drive the drill at a given feed will be more.
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4
While current is shut down in the welding circuit, what kind of voltage exists between the output terminals of the welding machine?
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4
Which of the following statement is wrong about ultrasonic machining?
A. It is best suited for machining hard and brittle materials
B. It cuts materials at very slow speeds
C. It removes large amount of material
D. It produces good surface finish
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4
In machining metal, cutting force at the cutting edge is measured by a
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4
The size of a lathe is specified by the
A. Length between centres
B. Swing diameter over the bed
C. Swing diameter over the carriage
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4
A hole is of dimension φ = 9 ₊0⁺⁰⁰¹⁵ mm. The corresponding shaft is of dimension φ = 9 ₊0.001⁺⁰⁰¹⁰ mm. The resulting assembly has
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4
Chip breakers are used to
C. Break the chips into short segments
D. To minimise heat generation
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4
The factor responsible for the formation of continuous chips with built up edge is
A. Low cutting speed and large rake angle
B. Low cutting speed and small rake angle
C. High cutting speed and large rake angle
D. High cutting speed and small rake angle
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4
The enlarging of an existing circular hole with a rotating single point tool is called