In Rockwell hardness test the hardness is measured by
A.The width of depression
B.The depth of depression
C.Diameter of depression
D.None of the above
A.The width of depression
B.The depth of depression
C.Diameter of depression
D.None of the above
A.high molecular weight
B.low specific volume
C.higher adiabatic index
D.lower specific speed
A.first power
B.second power
C.third power
D.fourth power.
A.10-2 cm
B.10-3 cm
C.10-4 cm
D.10-6 cm
E.None of the above
A.Solenoid valve
B.Expansion valve
C.Spring safety valve
D.Wheel valve
E.None of the above
A.screw type
B.rack-and-lever type
C.hydraulic type
D.Any of the above
A.to provide an opening through which molten metal is poured
B.to give an indication that mould is filled
C.to allow the heat of molten metal to dissipate to atmosphere
D.to supply molten metal to casting as it tends to contract during solidification
A.at least one man on side B should be removed
B.the force applied on A must be equal to that on B
C.the force required on A must not be equal to that on B
D.infinite force will be required to be applied at both ends
A.1.8 to 9.5 %
B.4.1 to74.2 %
C.3.2 to 12.5 %
D.1.6 to 8.5 %
A.Tempered
B.Hardened
C.Annealed
D.Tempered and annealed
E.Hardened and tempered