POST GRADUTE OPERATIVE MCQ TESTS

1) The total energy absorbed at the point of fracture is referred to


a) resilience.
b) brittleness.
c) toughness .
d) modulus of elasticity .



2) Which of the following is defined as that form of cavity preparation takes to aids the operator in preparing , placing and finishing the restoration


a) retention form .
b) resistance form .
c) convenience form.




3) The squeezing the material by external forces is called :


a) shear.
b) tension .
c) compression.




4) Cavities developed at the proximal surfaces of the anterior teeth not envolving the incisal edge are classified as


a) class I.
b) class II.
c) class II.
d) class IV.



5) Which of the following instrument is designed most effectively plane the enamel of the facial and lingual walls of the class II cavity preparation


a) a gingival marginal trimmer.
b) dstraight chisel.
c) enamel hatchet.
d) a spoon excavator.



6) The attraction of unlike molecules is referred to us


a) adhesion.
b) cohesion.



7) The outline form defined :


a) that form the cavity takes to resist the forces of mastication.
b) that form the cavity takes to resist the dislodgment or displacement of the restoration.
c) the shape or form of the cavity on the surface of the tooth.
d) all of the above.



The principle feature of a sealant that required for success is :


a) high viscosity.
b) adequate retention.
c) high strength .
d) an added coolant to make the appearance slightly different from the occlusal enamel .



9) Pin should be inserted into


a) enamel only.
b) dentine only.
c) enamel and dentine ( DEJ ).
d) any of the above.



10) The retention of a pin


a) decreases as the diameter of the pin increases .
b) increases as the diameter of the pin increases.
c) increases as the diameter of the pin decreases.
d) the retention of a pin nothing to do with diameter of the pin.

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