Medical MCQs

5099 MCQs  (Page 62 of 510)

A thinner mix of a gypsum bonded investment will_______________?
A. Produce a smoother casting
B. Decrease setting expansion
C. Increase setting expansion
D. Increase thermal expansion
Which one of the following is most elastic ?
A. A titanium
B. B titanium
C. Chrome-cobalt-nickel
D. Nickel-titanium
Cleaning of base metal alloy is done by______________?
A. Warm hci
B. Cold hf
C. Cold h2so4
D. Sand blasting with aluminium oxide
Localised shrinkage porosity is seen when there________________?
A. Thin sprue
B. No reservoir
C. Investment heated strongly
D. Inadequate air discharge
Which zone is the hottest and efficient burning zone of the flame used for casting ?
A. Oxidizing zone
B. Reducing zone
C. Combustion zone
D. None of the above
Which of the following will produce the most rigid restoration for framework of same dimension ?
A. Wrought alloy
B. Palladium alloys
C. Cobalt-chrome alloys
D. Partial denture casting gold in hardened condition