Dental Materials MCQs

Page No. 5

Co-efficient of Thermal exansion of amalgam is______________?


a6.6 a (ppm k-1)

✖


b14.0 a (ppm k-1)

✖


c25.0 a (ppm k-1)

✓


d11.4 a (ppm k-1)

✖


View Answer 25.0 a (ppm k-1)

Which of the following are characteristic feature of high copper amalgam alloy ?


aLow compressive strength

✖


bHigh marginal breakdown

✖


cLess marginal

✓


dHigh creep

✖


View Answer Less marginal

Cavo surface angle for amalgam resoration is butt joint as____________?


aIt increases compresssive and tensile strengths

✓


bDecreased compressive, increased strength

✖


cDecreased compressive, decreased strength

✖


dIncreased compressive, increased tensile strength

✖



Decrease in creep occurs in_______________?


aUnder trituration or over trituration of amalgam

✖


bDecreases with condensation pressure

✖


cIncrease with condensation pressure

✓


dCannot be predictable

✖



The effect of trituration on strength in an amalgam restoration depends on______________?


aAmalgam alloy

✖


bTrituration time

✖


cSpeed of amalgamator

✖


dAll of the above

✓


View Answer All of the above

What fraction of inhaled mercury vapors retained in the body ?


a45-55%

✖


b55-65%

✖


c65-85%

✓


dMore than 85%

✖


View Answer 65-85%

Mercury is toxic because it_____________?


aComplexes with hemoglobinto form methemoglobin

✖


bInhibits hemoglobin synthesis, producing anemia

✖


cInhibits anaerobic glycolysis

✖


dBinds to sulfhydryl groups

✓



Amalgam achieves 70% of the strength by____________?


a2 hours

✖


b4 hours

✖


c8 hours

✓


d16 hours

✖


View Answer 8 hours

Creep value of which of the following is the highest ?


aLow copper amalgam alloy

✓


bAdmix alloy

✖


cSingle composition alloys

✖


dCreep value of all the above mentioned alloys is same

✖



Which of the following statement is true regarding lathe cut low Copper silver alloy ?


aRequires least amount of mercury

✖


bAchieves high compressive strength at 1 hr.

✖


cHas tensile strength both at 15 minutes and 7 days is comparable to high copper, unicompositional alloys

✓


dHas lower creep value

✖



Goto Page No.

Page 5 of 62

Alphabetical MCQs Categories
—

Here below You find all kind of categories of MCQs in alphabetical order.


"Comprehensive Collection of MCQs: Alphabetically Organized by Subject"
—

"Discover an extensive collection of multiple-choice questions (MCQs) neatly categorized by subject from A to Z. This resource is designed for anyone eager to explore various topics in a straightforward and organized manner. Whether you're a student preparing for exams, an educator seeking supplementary materials, or simply curious about different subjects, this compilation offers a convenient way to learn and assess your knowledge. With questions arranged alphabetically, navigation is effortless, allowing you to delve into subjects of interest at your own pace. Engage, learn, and expand your understanding with this accessible and comprehensive repository of MCQs!"


BolPakistan

bolpakistan.com.pk includes Job Mcqs and Pak Mcqs is the Top Largest Mcqs Forum in World, in which you can read Mcqs of All Subjects, PPSC test preparation, FPSC, NTS and PPSC PAST PAPERS, PPSC PAST MCQS. A Collection of Repeated MCQs for JOBs seekers.

Copyright © 2024, Designed & Developed by BolPakistan