Chapter 5 · MCQ Read Mode

Manufacturing and Production Engineering

Slip gauges are combined to build a required size by the process of:

The standard reference temperature for dimensional measurement is:

The height of the slip-gauge pile for setting a 100 mm sine bar at 30° is:

A sine bar is considered unsuitable for measuring angles greater than about:

According to Taylor's principle, the GO gauge should check:

An instrument that gives consistent readings which are all away from the true value is:

The error caused when the line of measurement does not coincide with the axis of the measuring scale is a violation of:

A pneumatic (Solex) comparator is preferred where:

Long end bars are supported at the Airy points in order to:

Very small angular deviations of machine-tool guideways are measured with an:

Traceability of a measurement means that it can be related through an unbroken chain of calibrations to:

The spindle run-out of a lathe is checked during:

The taper of a conical workpiece of end diameters D and d over a length L is given by:

Shrinkage allowance on a pattern is provided because the casting:

The property of moulding sand that allows gases to escape is:

A riser in a casting must:

Zinc alloy components are usually die cast by the:

Cold shut and misrun defects in castings are caused mainly by:

In a press-working operation the piece punched out is the required product. The operation is:

The usual die clearance in blanking and piercing is about:

Spring-back in sheet-metal bending is compensated by:

The blank holder in deep drawing is used to prevent:

The coating on a manual arc-welding electrode does NOT:

The heat generated in resistance spot welding is given by:

The zone of a welded joint that is not melted but whose structure is changed by the welding heat is the:

Internal defects in a thick welded joint are best detected by:

Hot working of a metal is carried out:

Which of the following is NOT an advantage of cold working?

Lead and tin worked at room temperature are said to be:

In closed-die (impression) forging, the flash:

The maximum possible draft in rolling is given by:

A four-high rolling mill uses small-diameter work rolls with large back-up rolls in order to:

In wire drawing, the wire is:

Compared with direct extrusion, indirect (backward) extrusion requires:

In the flow-stress relation σ = Kεn, the exponent n represents the:

According to the Tresca criterion, the shear yield strength of a ductile metal is:

The von Mises (distortion-energy) criterion gives a shear yield strength of:

In plane-strain deformation, the flow stress according to von Mises becomes:

During plastic deformation of a metal, the volume:

In electric discharge machining, the material is removed by:

A basic requirement of the workpiece in EDM is that it must be:

Ultrasonic machining is most suitable for:

In electro-chemical machining, the workpiece is connected as the:

A major advantage of ECM is that:

The material removal rate in ECM depends mainly on:

Wire EDM uses a wire electrode usually made of:

Laser beam machining removes material by:

In CNC programming, the code for rapid traverse is:

The M-code used for tool change in a CNC machine is:

DNC (direct/distributed numerical control) means:

The robot configuration best suited for fast horizontal assembly operations is:

The ability of a robot to return repeatedly to the same taught point is its:

In orthogonal cutting, the chip thickness ratio is always:

A built-up edge is most likely to form when machining:

Discontinuous chips are normally produced when machining:

In Merchant's analysis, the relation between shear angle φ, friction angle β and rake angle α is:

An increase in the shear angle during cutting results in:

The coefficient of friction between chip and tool in Merchant's circle is:

A negative rake angle is generally used with:

The theoretical surface roughness in turning improves when:

The usual criterion for the end of tool life in rough machining is:

Crater wear on the rake face of a carbide tool is caused mainly by:

In Taylor's tool life equation VTn = C, the value of n for carbide tools is about:

If V = 100 m/min gives a tool life of 16 min with n = 0.25, then at V = 200 m/min the tool life becomes:

Among speed, feed and depth of cut, the parameter that affects tool life most strongly is:

The property that allows a cutting tool material to retain its hardness at high cutting temperatures is:

The composition 18-4-1 refers to a:

Cemented carbide tools can normally work up to a temperature of about:

Diamond tools are not used for machining steel because:

In the ISO classification of carbide tools, grade K is intended mainly for machining:

Ceramic cutting tools are generally not recommended for:

The main function of a cutting fluid at high cutting speeds is:

Soluble oil (emulsion) cutting fluids are widely used because they:

Extreme-pressure (EP) additives are added to cutting oils to:

Most of the heat generated in metal cutting is carried away by the:

The highest temperature in metal cutting occurs:

The proportion of total cutting heat generated in the primary shear zone is about:

The cutting temperature is affected most strongly by: