A.they are exothermic reactions
B.they are endothermic reactions
C.the energy of the reacting molecules exceeds the activation energy by absorption of light
D.they are reversible reactions
A.size and shape of the casting
B.casting orientation
C.characteristics of the metal
D.all of the above
A.Stuart key
B.Morgan key
C.Cotter key
D.Woodruff key
A.Same is combustion
B.Process of heat liberation in which no flame exist
C.Slow combustion
D.Smokeless combustion
E.Combustion without heat
A.Celestial force
B.Gravitational force
C.Centrifugal force
D.Centripetal force
E.All of the above
A.tenacity
B.dustility
C.porosity
D.malleability
A.square
B.circular
C.rectangular
D.any of the above
A.Inward projecting entrances
B.Square bell mouth entrances
C.Circular bell mouth entrances
D.Slightly rounded entrance
E.Square cornered entrance
A.37.57 psi suction
B.10 psi suction
C.13.757 psi suction
D.23.757 psi suction
A.The first row
B.Row with maximum rivets
C.Middle row
D.End row with one rivet only
E.All rows have same strength
