GATE 2024 Mechanical Engineering: Important basic concepts in Production technology and Foundry (GATE-2019) Part-3

The present post (Part-3) contains the important basic concepts in Production technology in Mechanical Engineering. Note down each concept which might help in GATE 2019 Mechanical.

The purpose of the riser is to help feed the casting until all solidification takes place.
A silver refers to the temperature of equilibrium between solid silver and liquid silver at normal atmospheric pressure.
The gold point refers to 1063⁰C.
The silverpoint refers to 960.50⁰C.
Rotameter is used for flow of liquids and gases.
The impedance of piezo-electric crystal is high.
Hotwire anemometers are generally used for measuring the velocity of air stream.
Scale sensitivity is defined as the ratio of a change in scale reading to the corresponding change in pointer deflection.
In carthias process, the cavity is filled with a pre-calculated quantity of metal and a core or plunger is inserted to force the metal into the cavity.
In slush casting process metal is poured in to die cavity, and after a predetermined time the mold is inverted to permit a part of metal still in molten to flow out of the cavity.
Ornaments are cast by gravity casting.
During MIG welding the metal is transferred in the form of a fine spray of metal.
A collimated light beam is used for producing heat in laser welding.
Wipping is the process of connecting loss pipes by soldering alloy.
In water jet machining process hydraulic fluid acts as transfer media.
The power consumption in ultrasonic machining in kW/cm³/min is of the order of 10 kW/m³/min.
Sweep pattern is used for molding parts having uniform symmetrical shape.
The helix angle on a HSS (High-Speed Steel) twist drill for drilling cast iron is of the order of 24-32⁰.
The usual value of helix angle of a drill is 30⁰.
A twist drill is specified by shank, material, and diameter.
The broaching operation is generally used in the automobile industry as semi-skilled operators can be employed.
For proper broaching operation, at least three number of teeth should be in the work at a time.