The facing is an operation of
A. Beveling the extreme end of a workpiece
B. Embossing a diamond shaped pattern on the surface of a workpiece
C. Reducing the diameter of a workpiece over a very narrow surface
D. Machining the ends of a workpiece to produce a flat surface square with the axis
Select an option to see the answer and solution.
Threading is an operation of
A. Smoothing and squaring the surface around a hole
B. Sizing and finishing a small diameter hole
C. Producing a hole by removing metal along the circumference of a hollow cutting tool
D. Cutting helical grooves on the external cylindrical surface
Select an option to see the answer and solution.
Quality screw threads are produced by
A. Thread milling
B. Thread chasing
C. Thread cutting with single point tool
D. Thread casting
Select an option to see the answer and solution.
Ultrasonic machining is best suited for
A. Tool steels
B. Sintered carbides
C. Glass
D. All of these
Select an option to see the answer and solution.
Which of the following parameters govern the value of shear angle in continuous chip formation?
A. True feed
B. Chip thickness
C. Rake angle of the cutting tool
D. All of these
Select an option to see the answer and solution.
Surface grinding is done to produce
A. Tapered surface
B. Flat surface
C. Internal cylindrical holes
D. All of these
Select an option to see the answer and solution.
The percentage of carbon in gray cast iron is in the range of
A. 0.25 to 0.75 percent
B. 1.25 to 1.75 percent
C. 3 to 4 percent
D. 8 to 10 percent
Select an option to see the answer and solution.
Tool life is measured by the
A. Number of pieces machined between tool sharpenings
B. Time the tool is in contact with the job
C. Volume of material removed between tool sharpenings
D. All of the above
Select an option to see the answer and solution.
The different spindle speeds on a lathe form
A. Arithmetical progression
B. Geometrical progression
C. Harmonical progression
D. Any one of these
Select an option to see the answer and solution.
A better machinable metal is one which gives
A. Lower chip-tool contact area and larger shear angle
B. Higher chip-tool contact area and smaller shear angle
C. Lower chip-tool contact area and smaller shear angle
D. Higher chip-tool contact area and larger shear angle
Select an option to see the answer and solution.
The shear velocity is the velocity of
A. Tool relative to the workpiece
B. Chip relative to the tool
C. Tool along the tool face
D. None of these
Select an option to see the answer and solution.
A ring gauge is used to measure
A. Outside diameter but not roundness
B. Roundness but not outside diameter
C. Both outside diameter and roundness
D. Only external threads
Select an option to see the answer and solution.
The grinding of long, slender shafts or bars is usually done by
A. In-feed grinding
B. Through feed grinding
C. End-feed grinding
D. Any one of these
Select an option to see the answer and solution.
What is the name of the device used in arc welding circuits for the purpose of modifying the rate of current change when the weld road is varied rapidly?
A. Reactor
B. Kerf
C. Inductor
D. Cone
Select an option to see the answer and solution.
Thread grinding requires work speed from
A. 1 to 3 m/min
B. 5 to 10 m/min
C. 10 to 14 m/min
D. 14 to 20 m/min
Select an option to see the answer and solution.
Small nose radius
A. Increases tool life
B. Decreases tool life
C. Produces chipping and decreases tool life
D. Results in excessive stress concentration and greater heat generation
Select an option to see the answer and solution.
The cutting speed is maximum while machining _________ with a high speed steel tool.
A. Cast iron
B. Mild steel
C. Brass
D. Aluminium
Select an option to see the answer and solution.
The cutting speed is minimum while machining _________ with a high speed steel tool.
A. Cast iron
B. Mild steel
C. Brass
D. Aluminium
Select an option to see the answer and solution.
Which among the NC operations given below are continuous path operations? Arc Welding (AW), Drilling (D), Laser Cutting of Sheet Metal (LC), Milling (M), Punching in Sheet Metal (P), Spot Welding (SW)
A. AW, LC and M
B. AW, D, LC and M
C. D, LC, P and SW
D. D, LC, and SW
Select an option to see the answer and solution.
The material property which depends only on the basic crystal structure is
A. Fatigue strength
B. Work hardening
C. Fracture strength
D. Elastic constant
Select an option to see the answer and solution.