Workshop Technology - Study Mode
[#136] The machining allowance provided on patterns depends upon
Correct Answer
(D) All of these
Explanation
Solution: The machining allowance provided on patterns depends upon the Type of casting metal and the Size and shape of casting and Method of casting used
[#137] The metal patterns as compared to wooden patterns require less
Correct Answer
(C) Draft allowance
Explanation
Solution: Draft Allowance: by draft is meant the taper provided by the pattern maker on all vertical surfaces of the pattern so that it can be removed from the sand without tearing away the sides of the sand mold and without excessive rapping by the molder. The metal patterns as compared to wooden patterns require less draft allowance.
[#138] Aluminium is the best material for making patterns because it is
Correct Answer
(D) All of these
Explanation
Solution: Aluminum Patterns are the good choice for high quality, long lasting Production. Compared to other pattern materials, Aluminium is highly resistant to the abrasive sand.
[#139] In submerged arc welding, an arc is produced between a
Correct Answer
(C) Bare metal electrode and the work
Explanation
Solution: Submerged arc welding is an arc welding process in which heat is generated by an arc which is produced between bare consumable electrode wire and the workpiece.
[#140] Rotary swaging
Correct Answer
(B) Is used for reducing the diameters of round bars and a tube by rotating dies which open and close rapidly on the work
Explanation
Solution: Rotary swaging Is used for reducing the diameters of round bars and a tube by rotating dies which open and close rapidly on the work