26 Questions
What are the two types of cylindrical grinding machines mentioned in the text?
External and internal
Which type of surface grinder is characterized by leaving a criss-cross pattern of grinding scratches on the work surface?
Vertical spindle and rotary table type
What operation involves removing excess material from metal parts using a grinding wheel made of hard abrasives?
Cylindrical grinding
In which gear grinding process are two saucer shaped grinding wheels used?
Generating process
What classification of grinding wheels is made up of many hard particles known as abrasives with sharp edges?
Solid grinding wheels
Which principal group does diamond belong to according to abrasive classification?
Natural abrasives
What is emery used for as an abrasive?
To grind softer materials only
Which type of surface grinder has the majority that are of horizontal spindle types?
Horizontal spindle and rotary table type
How does taper grinding on long workpieces differ from taper grinding on short workpieces?
By swivelling the upper table for long workpieces and swivelling the wheelhead for short workpieces.
In thread grinding machines, how is the grinding wheel shaped?
To match the thread profile
What is the main purpose of grinding in machining processes?
To obtain high dimensional accuracy
Which type of grinding machine is used to remove excess metal from cast parts with no regard to accuracy?
Hand grinding machine
What is the level of accuracy achieved in the grinding process?
0.000025mm
Which type of grinding machine is used to finish parts to very accurate dimensions?
Surface grinding machine
What do precision grinders primarily focus on when finishing parts?
Accuracy of dimensions
Which type of grinding machines are used to remove excess metal from welded joints?
Floor stands grinding machines
What is the hardest available natural abrasive?
Diamond
What substance is employed to hold abrasive grains together in the form of grinding wheels?
Bond
Which abrasive material is used for grinding materials of low tensile strength like ceramic materials?
Silicon carbide
Which abrasive material is better adapted for grinding materials of high tensile strength like most steels?
Aluminium oxide
What is the grain size that indicates a large grain of abrasive in the grinding wheel?
Coarse
What does the grade of a grinding wheel refer to?
'Soft' or 'hard' bond types
What type of bond holds abrasive grains more securely in a grinding wheel?
'Hard'
What does the structure of a grinding wheel refer to?
'Dense' or 'open' spacing between abrasives
What Indian standard marking element represents the size of abrasive in a grinding wheel?
'Second element (number)'
'Green grit' and 'black grit' are associated with which type of artificial abrasive?
'Silicon carbide abrasives'
This quiz covers the introduction to grinding machines and the process of grinding metal with high dimensional accuracy. It discusses the use of abrasive wheels and the purpose of grinding operations for achieving precision and improved appearance.
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