Related Questions

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
In ultrasonic machining, tool is made of
A Tungsten carbide
B Brass or copper
C Diamond
D Stainless steel
The abrasive slurry used in ultrasonic machining contains fine particles of
A Aluminium oxide
B Boron carbide
C Silicon carbide
D Any one of these
In ultrasonic machining, the metal is removed by
A Using abrasive slurry between the tool and work
B Direct contact of tool with the work
C Maintaining an electrolyte between the work and tool in a very small gap between the two
D Erosion caused by rapidly recurring spark discharges between the tool and work
Ultrasonic waves are beyond the range of sound a human can hear.
A outside
B with
C over
D around
Ultrasonic measurements used to confirm gestational age are
A Crown-ramp length
B Biparietal diameter
C Nuchal pad thickness
D Gestational sac volume
E Yolk sac volume
Ultrasonic waves are used for stirring liquid solutions because they
A do not produce noise during the operation
B are easy to produce
C can produce perfectly homogeneous solutions
D do not produce chemical reactions in the solution
Which one of the following animals can hear ultrasonic sound ?
A Rat
B Squirrel
C Cat
D Bat
Which of the following are considered applications of ultrasonic testing ?
A Determination of elastic constant
B Detection of defects in metal
C Measurement of material thickness
D None of the above
The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.
A 0.5
B 3
C 10
D 25

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