A.If friction is neglected, the reactions are always normal to the surfaces on contact
B.Friction always acts to oppose the relative motion of the free body
C.If static friction is acting, the value of the friction force may vary from zero to its maximum value
D.The force of friction is always normal to the surface
E.All of the above
A.Unit of noise level
B.A logarithmic ratio between a measured quantity and a reference quantity
C.Quantity of noise per unit area
D.A logarithmic ratio between a measured quantity and 100
E.None of the above
A.Along the line joining the two points
B.Perpendicular to the line joining the two points
C.Same as that of the end points of link
D.Perpendicular to the lower end of the link
E.None of the above
A.It has low density
B.It has high viscosity
C.Its thermal conductivity is high
D.It is a diatomic molecule
E.Its critical temperature is lower than the normal room temperature
A.Sensitivity training
B.On the job
C.Apprenticeship
D.Programmed instructions
E.Demonstration and example
A.0.4
B.0.8
C.1088
D.5.44
E.None of the above
A.Atomic weight
B.Atomic radius
C.Atomic volume
D.Atomic number
A.3 ata
B.4 ata
C.5 ata
D.5.5 ata
E.7.5 ata
A.lamp method
B.quartz tube method
C.bomb method
D.none of the above
A.at the highest position
B.at the lowest position
C.at the midway position
D.at none of the above
