Cores are used – McqOptions

MCQOPTIONS

1.	Cores are used
A.	To make castings sound
B.	To strengthen mould
C.	To get cavity or recess in a casting
D.	To get smooth surface on castings
E.	In symmetrical casting only
Answer» D. To get smooth surface on castings

Discussion

No Comment Found

Related MCQs

In ultrasonic machining, tool is made of
Stellite preserves hardness up to a temperature of
A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through hole in a mild steel plate 20 mm thickness. The depth of cut in this drilling operation is
Which of the following arc welding processes does not use consumable electrodes?
Two plates of the same metal having equal thickness are to be butt welded with electric arc. When the plate thickness changes, welding is achieved by
Which of the following statement is wrong about ultrasonic machining?
The operation in which oil is permeated into the pores of a powder metallurgy product is known as
The maximum possible draft in cold rolling of sheet increases with the
A CNC vertical milling machine has to cut a straight slot of 10 mm width and 2 mm depth by a cutter of 10 mm diameter between points (0,0) and (100,100) on the XY plane (dimensions in mm). The feed rate used for milling is 50 mm/min, milling time for the slot (in seconds) is
A solid cylinder of diameter 100 mm and height 50 mm is forged between two frictionless flat dies to a height of 25 mm. The percentage change in diameter is