Which of the following statements correct?
A.Rockwell scale B in used for hard metals
B.Rockwell scale C is used for hard metals
C.Rockwell scale C is used for soft metals
D.Rockwell scale A is used for hard metals
Category: Production Engineering Mcqs
In centrifugal castings, the cores are generally made of
A.Green sand and molasses
B.Wax
C.Plastic
D.Plaster of paris
E.Cores are not used
The temperature scanning system are used
A.Where temperature control at a point is important
B.Where temperature difference between two points is important
C.Where system is capable of working without temperature control
D.Where monitoring of a relatively large number of temperatures is needed
E.None of the above
Heating elements for domestic and industrial electrical applications are made of
A.Duralumin
B.Invar
C.Nichrome
D.Babbit metal
E.Delta metal
Noise level in case of an aircraft is
A.Generally less than 100 db
B.Generally more than 100 db
C.Always more than 100 db
D.In the range of 60 – 80 db
E.In the range of 80 – 110 db
For the soldering of galvanized iron the flux used is
A.Hydrochloric acid
B.Zinc oxide
C.Muriatic acid
D.Ammonium chloride
E.None of the above
In following operations are to be performed on a job, which one would be performed first
A.Drilling
B.Boring
C.Counter sinking
D.Tapping
E.Sport facing
The audible spectrum of sound is in the range of
A.0 to 100 cps
B.30 to 15000 cps
C.15000 to 25000 cps
D.25000 to 10000 cps
Fetling of castings is done to
A.Smoothen surfaces
B.Fill the void by welding
C.Remove the extra material from castings
D.To remove internal stresses from castings
E.To produce uniformly cooled castings.
Which one of the following is an angle measuring device?
A.Trammel
B.Hermaphrodite caliper
C.Divider
D.Angle iron
E.Sine bar
