DENTAL MECHANIC – MEDICAL EDUCATION
PROVISIONAL ANSWER KEY
Question Paper Code: 58/2019/OL
Category Code: 015/2019
Exam: Dental Mechanic
Medium of Question: English
Date of Test 03-12-2019
Department Medical education
Alphacode A
Question1:-The primary denture support area for a mandibular complete denture is
A:-The crest of the ridge
B:-Buccal shelf area
C:-Mylohyoid ridge
D:-Retromolar pad
Correct Answer:- Option-B
Question2:-Two or more parallel axial surfaces of abutment teeth shaped to direct the prosthesis during placement and
removal are called
A:-Indirect retainers
B:-Undercuts
C:-Guiding planes
D:-Reciprocation
Correct Answer:- Option-C
Question3:-The advantage of a metal denture base over a resin base is
A:-Low cost
B:-Poor dimensional stability
C:-Greater weight
D:-Thermal conductivity
Correct Answer:- Option-D
Question4:-Face-bow is used for
A:-Recording vertical jaw relation
B:-Recording horizontal jaw relation
C:-Recording orientation jaw relation
D:-Recording centric relation
Correct Answer:- Option-C
Question5:-The cross section of lingual bar is
A:-Pear shaped
B:-Half pear shaped
C:-Round shaped
D:-Triangular shaped
Correct Answer:- Option-B
Question6:-During surveying, the height of contour is delineated by
A:-Analyzing rod
B:-Undercut gauge
C:-Carbon marker
D:-Wax knife
Correct Answer:- Option-A
Question7:-Labial frenum contains
A:-Levator angulioris muscle
B:-Buccinator
C:-Orbicularis muscle
D:-No muscle
Correct Answer:- Option-D
Question8:-The primary purpose of posterior palatal seal is
A:-To provide retention for the maxillary denture
B:-To provide support for the maxillary denture
C:-To reduce food accumulation beneath the denture
D:-To compensate the volumetric shrinkage of polymerisation of acrylic resin
Correct Answer:- Option-A
Question9:-Labial bar is indicated in case of
A:-Incompetent lips
B:-Diastema
C:-Labial inclination of teeth
D:-Lingual inclination of teeth
Correct Answer:- Option-D
Question10:-The part of an RPD frame work that transmits stress to the abutment teeth and also serves as a vertical stop
for the framework is called a
A:-Major connector
B:-Minor connector
C:-Rest
D:-Denture base
Correct Answer:- Option-C
Question11:-A mean value articulator is also known as
A:-Anatomic articulator
B:-Hinge articulator
C:-Three point articulator
D:-Semi adjustable articulator
Correct Answer:- Option-C
Question12:-The posterior occlusal plane in complete denture is made parallel to
A:-Ala tragal line
B:-High lip line
C:-Low lip line
D:-Frankfurt horizontal plane
Correct Answer:- Option-A
Question13:-Which of the following Kennedy’s class cannot have modification spaces?
A:-Class I
B:-Class II
C:-Class III
D:-Class IV
Correct Answer:- Option-D
Question14:-Boiling point of PMMA monomer is
A:-103°C
B:-100.8°C
C:-130°C
D:-113°C
Correct Answer:- Option-B
Question15:-Base metal alloys are most commonly invested using
A:-Gypsum bonded investment
B:-Phosphate bonded investment
C:-Silicate bonded investment
D:-Divestment
Correct Answer:- Option-B
Question16:-Which of the following is not hydrophilic?
A:-Agar
B:-Polysulphide
C:-Alginate
D:-Polyether
Correct Answer:- Option-B
Question17:-Tripoding the cast is done for
A:-Reorientation of the cast to surveyor
B:-Reorientation of the cast to articulator
C:-Recording the undercut area of the cast
D:-Recording the undercut area of the teeth
Correct Answer:- Option-A
Question18:-Zinc oxide-eugenol impression material sets by
A:-Exothermic reaction
B:-Syneresis
C:-Chelation
D:-Imbibition
Correct Answer:- Option-C
Question19:-Which of the following is known as Model cement?
A:-Beading wax
B:-Boxing wax
C:-Sticky wax
D:-Modelling wax
Correct Answer:- Option-C
Question20:-The most dimensionally accurate impression material is
A:-Agar
B:-Polysulfide
C:-Polyether
D:-Addition silicone
Correct Answer:- Option-D
Question21:-The term “Green shrinkage” is related to
A:-Firing of Porcelain
B:-Investments
C:-Shrinkage of acrylicresin
D:-Alginate
Correct Answer:- Option-B
Question22:-Balanced stone refers to
A:-Dental stone
B:-Impression compound
C:-Resin incorporated gypsum product
D:-Product containing equal amount of accelerator and retarder
Correct Answer:- Option-D
Question23:-The distance between maxillary major connector and gingival margin is
A:-6 mm
B:-3 mm
C:-8 mm
D:-4 mm
Correct Answer:- Option-A
Question24:-The minimum thickness of base of the cast at its thinnest portion should be
A:-7 mm
B:-10 mm
C:-14 mm
D:-16 mm
Correct Answer:- Option-B
Question25:-The most important factor in the arrangement of teeth is
A:-Mold
B:-Leverage
C:-Occlusion
D:-Compensating curve
Correct Answer:- Option-C
Question26:-The most difficult tooth to set in a complete denture patient is
A:-Maxillary canine
B:-Maxillary 1st Premolar
C:-Maxillary central incisor
D:-Mandibular canine
Correct Answer:- Option-C
Question27:-The pontic given in esthetic zone is
A:-Ovate
B:-Saddle
C:-Hygienic
D:-Modified ridge lap
Correct Answer:- Option-A
Question28:-A refractory die is made from
A:-Primary impression
B:-Secondary impression
C:-Duplicating the master die
D:-Duplicating the primary die
Correct Answer:- Option-C
Question29:-Porcelain bond to the alloy primarily by
A:-Chemical bond
B:-Mechanical bond
C:-Vander wall bond
D:-Micromechanical bond
Correct Answer:- Option-A
Question30:-Which of the following material is not desirable for making refractory cast from final cast of RPD?
A:-Agar
B:-Alginate
C:-Silicone
D:-Polyether
Correct Answer:- Option-D
Question31:-Permanent tooth with least mesio-distal dimension is
A:-Maxillary central incisor
B:-Maxillary lateral incisor
C:-Mandibular central incisor
D:-Mandibular lateral incisor
Correct Answer:- Option-C
Question32:-Which among these is used for designing cast partial denture?
A:-Bite wax
B:-Base plate wax
C:-Casting wax
D:-Sticky wax
Correct Answer:- Option-B
Question33:-Buffing wheels are used in
A:-Grinding process
B:-Cutting process
C:-Finishing process
D:-Polishing process
Correct Answer:- Option-D
Question34:-The projection of maxillary anterior teeth beyond their antagonists in a horizontal plane is referred to as
A:-Cuspal inclination
B:-Over jet
C:-Over bite
D:-Centric occlusion
Correct Answer:- Option-B
Question35:-Rouge is used in polishing
A:-Titanium
B:-Acrylic
C:-Zirconium
D:-Gold
Correct Answer:- Option-D
Question36:-The use of Chromium in Cobalt – Chromium alloy is
A:-Improving biocompatability
B:-Decrease the hardness
C:-Corrosion resistance
D:-Increase castability
Correct Answer:- Option-C
Question37:-Which of the following fuel gas is better for soldering?
A:-Natural gas
B:-Butane
C:-Propane
D:-Acetylene
Correct Answer:- Option-C
Question38:-The hardest structure in human body is
A:-Enamel
B:-Dentin
C:-Bone
D:-Periodontal ligament
Correct Answer:- Option-A
Question39:-Which among the following is a most commonly used provisional restoration?
A:-Poly carbonate crowns
B:-Acrylic crowns
C:-Cellulose acetate crowns
D:-Preformed stainless steel crowns
Correct Answer:- Option-B
Question40:-The most common tilt employed during surveying is
A:-Anterior tilt
B:-Posterior tilt
C:-Zero tilt
D:-Lateral tilt
Correct Answer:- Option-C
Question41:-Proximal plate employed in RPD is
A:-Direct retainer
B:-Indirect retainer
C:-Minor connector
D:-Major connector
Correct Answer:- Option-C
Question42:- I bar engages
A:-Mesiobuccal undercut
B:-Distobuccal undercut
C:-Mesial undercut
D:-Distal undercut
Correct Answer:- Option-B
Question43:-Swing lock partial denture is a modification of
A:-Labial bar
B:-Lingual bar
C:-Palatal bar
D:-Linguoplate
Correct Answer:- Option-A
Question44:-Christensen’s Phenomenon is associated with
A:-Complete dentures
B:-RPD
C:-FPD
D:-Implant dentures
Correct Answer:- Option-A
Question45:-All of the following are components of pontic except
A:-Facing
B:-Solder joint
C:-Backing
D:-Connector
Correct Answer:- Option-D
Question46:-The ability of the prosthesis to resist displacement in a vertical direction is
A:-Retention
B:-Stability
C:-Support
D:-Resilience
Correct Answer:- Option-A
Question47:-The angle the rest makes with the minor connector should be
A:-90°
B:-Greater than 90°
C:-180°
D:-Less than 90°
Correct Answer:- Option-D
Question48:-The filler incorporated in a impression material imparts
A:-Strength
B:-Plasticity
C:-Flow
D:-Elasticity
Correct Answer:- Option-A
Question49:-The most durable maxillofacial prosthetic material is
A:-Polyurethanes
B:-Epiamines
C:-Silicones
D:-Polyvinyl chloride
Correct Answer:- Option-C
Question50:-The maximum intercuspation of teeth is
A:-Centric relation
B:-Centric occlusion
C:-Occlusion
D:-Vertical dimension
Correct Answer:- Option-B
Question51:-Die spacer should provide space of
A:-0.1 microns
B:-0.25 microns
C:-0.35 microns
D:-0.5 microns
Correct Answer:- Option-B
Question52:-Wires preferred for leveling and alignment
A:-Rectangular
B:-Round
C:-Triangular
D:-Elliptical
Correct Answer:- Option-C
Question53:-In blocking out the master cast during surveying, which one of the following is not a blockout?
A:-Paralleled blockout
B:-Shaped blockout
C:-Arbitrary blockout
D:-Round blockout
Correct Answer:- Option-D
Question54:-The function of minor connector in a clasp assembly is
A:-Retention
B:-Stabilization
C:-Support
D:-All of the above
Correct Answer:- Option-D
Question55:-Which of the following cements possesses anticariogenic property?
A:-Polycarboxylate
B:-Glassionomer
C:-Zinc Phosphate
D:-Zn O Eugenol
Correct Answer:- Option-B
Question56:-What must be added to steel in order to render it stainless?
A:-Chromium oxide 3-20%
B:-Carbon < 1.2%
C:-Chromium 12-30%
D:-Fluoride 2-3%
Correct Answer:- Option-C
Question57:-White gold alloys contain
A:-Platinum
B:-Palladium
C:-Ruthenium
D:-Beryllium
Correct Answer:- Option-B
Question58:-The activator used in visible light curing system is
A:-Ubiquinone
B:-Hydroquinone
C:-Benzoyl peroxide
D:-Camphoroquinone
Correct Answer:- Option-D
Question59:-The cement used for attachment of orthodontic brackets to teeth is
A:-Zinc Phosphate
B:-Glassionomer
C:-Resin cement
D:-Zn O - Eugenol
Correct Answer:- Option-C
Question60:-Most common drawback of amalgam restoration is
A:-Secondary expansion
B:-Porosity
C:-Marginal breakdown
D:-Contraction on setting
Correct Answer:- Option-A
Question61:-In complete denture patients,
A:-Centric relation coincides with centric occlusion
B:-Centric occlusion is anterior to centric relation
C:-Centric occlusion is posterior to centric relation
D:-Centric relation is independent of centric occlusion
Correct Answer:- Option-A
Question62:-Black casting results due to
A:-Contamination with sulphur
B:-Contamination with lead
C:-Contamination with Arsenic
D:-Contamination with Hydrogen
Correct Answer:- Option-A
Question63:-Beading provides
A:-Impression area of cast
B:-Land area of cast
C:-Art part of the cast
D:-Base of the cast
Correct Answer:- Option-B
Question64:-The corner stone of maxillary dental arch is
A:-Maxillary central incisor
B:-Maxillary canine
C:-Maxillary first premolar
D:-Maxillary lateral incisor
Correct Answer:- Option-B
Question65:-The mean value articulator is based on which theory of occlusion?
A:-Bonwill's theory
B:-Spherical theory
C:-Conical theory
D:-Lingualised occlusion
Correct Answer:- Option-A
Question66:-The process of applying a thin mix of dental stone which is painted over the wax surface and denture teeth is
A:-Stippling
B:-Festooning
C:-Coring
D:-Indexing
Correct Answer:- Option-C
Question67:-The curve located antero posteriorly in a complete denture is
A:-Curve of Spee
B:-Pleasure curve
C:-Monson curve
D:-Curve of Wilson
Correct Answer:- Option-A
Question68:-Hawley's appliance is used in orthodontics for
A:-Relapse
B:-Retention
C:-Anchorage
D:-Reciprocation
Correct Answer:- Option-B
Question69:-The choice of pontic in mandibular posterior region is
A:-Ridge lap
B:-Ovate
C:-Sanitary
D:-Saddle
Correct Answer:- Option-C
Question70:-Screw gag is indicated for patients having
A:-Trismus
B:-Fracture of facial skeleton
C:-Cleft palate
D:-Cheloid
Correct Answer:- Option-A
Question71:-An obturator is indicated for patients having
A:-Irradiation
B:-Trauma
C:-Cleft palate
D:-Deviation of mandible
Correct Answer:- Option-C
Question72:-A combination clasp consists of
A:-Cast retentive arm and wrought reciprocal arm
B:-Cast reciprocal arm and wrought retentive arm
C:-Basemetal reciprocal arm and gold retentive arm
D:-Bar clasp and circumferential clasp
Correct Answer:- Option-B
Question73:-Reinforcing shellac or acrylic with orthodontic wires increases
A:-Ductility
B:-Malleability
C:-Strength
D:-Resiliency
Correct Answer:- Option-C
Question74:-The simultaneous contact of all teeth both in centric as well as eccentric relation and in right and left and
anterior and posterior occlusal areas is referred to as
A:-Monoplane occlusion
B:-Centric occlusion
C:-Stability
D:-Balanced occlusion
Correct Answer:- Option-D
Question75:-The term Pindex is related to
A:-Devesting
B:-Ceramic system
C:-Die system
D:-Articulator
Correct Answer:- Option-C
Question76:-The most commonly used separating media is
A:-Sodium alginate
B:-Potato starch
C:-Slurry water
D:-Gum arabic
Correct Answer:- Option-A
Question77:-Muscles of mastication include all except
A:-Massetter
B:-Temporalis
C:-Lateral Pterygoid
D:-Platysma
Correct Answer:- Option-D
Question78:-Heat cure acrylic is packed in
A:-Wet and sandy stage
B:-Rubbery stage
C:-Dough stage
D:-Stiff stage
Correct Answer:- Option-C
Question79:-The process of resurfacing the tissue surface of the denture base is
A:-Tissue conditioning
B:-Relining
C:-Rebasing
D:-Remounting
Correct Answer:- Option-B
Question80:-The distance between the incisive papilla and the central incisors in teeth arrangement should be
A:-16 mm
B:-18 mm
C:-6-8 mm
D:-10-12 mm
Correct Answer:- Option-C
Question81:-The letters M and S in the teeth set indicate
A:-Mold and size
B:-Mold and shape
C:-Mold and shade
D:-Mold and square
Correct Answer:- Option-C
Question82:-The cusp of Carabelli is found on
A:-Maxillary first molar
B:-Maxillary 2nd molar
C:-Mandibular 1st molar
D:-Mandibular 2nd molar
Correct Answer:- Option-A
Question83:-The mesial developmental groove or mesial developmental depression is found in
A:-Maxillary 2nd Premolar
B:-Maxillary 1st premolar
C:-Maxillary 2nd molar
D:-Canine
Correct Answer:- Option-B
Question84:-The oblique ridge found in maxillary first molar connects
A:-Mesiolingual and distobuccal cusps
B:-Mesiobuccal and distolingual cusps
C:-Mesiolingual and distolingual cusps
D:-Mesiobuccal and distobuccal cusps
Correct Answer:- Option-A
Question85:-Labial bow is used in
A:-Retraction
B:-Tipping
C:-Intrusion
D:-Expansion
Correct Answer:- Option-A
Question86:-The ability of the material to be drawn into thin wires is called
A:-Malleability
B:-Ductility
C:-Toughness
D:-Resilience
Correct Answer:- Option-B
Question87:-Posterior Palatal seal area aids in
A:-Retention of denture
B:-Stability of denture
C:-Support of denture
D:-Preservation of alveolar ridge
Correct Answer:- Option-A
Question88:-The apparent force of attraction existing between two dissimilar bodies in close contact is
A:-Adhesion
B:-Cohesion
C:-Capillarity
D:-Viscosity
Correct Answer:- Option-A
Question89:-The refractory material used in investment is
A:-Silica
B:-Carbon
C:-Boron
D:-Gypsum
Correct Answer:- Option-A
Question90:-Antiflux used during soldering is
A:-Borax
B:-Fluoride
C:-Graphite
D:-Silica
Correct Answer:- Option-C
Question91:-Ditching should be done in dies
A:-0.5 mm short of finish line
B:-0.5 mm beyond finish line
C:-1.3 mm short of finish line
D:-1.5 mm beyond finish line
Correct Answer:- Option-A
Question92:-The technique of acrylisation employed routinely in dental practice is known as
A:-Injection molding technique
B:-Compression molding technique
C:-Fluid resin technique
D:-Visible light curing technique
Correct Answer:- Option-B
Question93:-Coffin spring is employed for
A:-Buccal movement of canines
B:-Proclination of upper anterior teeth
C:-Expansion of maxillary arch
D:-Distalisation of canine
Correct Answer:- Option-C
Question94:-Anterior inclined plane or upper inclined plane is used in correction of
A:-Proclination of anterior teeth
B:-Retroclination of lower anterior teeth
C:-Splinting of upper anterior teeth
D:-Tongue thrusting
Correct Answer:- Option-B
Question95:-The zone of flame that is used in casting process is
A:-Dark zone
B:-Combustion zone
C:-Reducing zone
D:-Oxidising zone
Correct Answer:- Option-C
Question96:-The sprue length and thickness used in casting should be
A:-Short and thin
B:-Long and thick
C:-Long and thin
D:-Short and thick
Correct Answer:- Option-D
Question97:-Chamfer finish line is employed in fixed partial denture for
A:-Porcelain crown
B:-Metal crown
C:-Zirconia crown
D:-CAD CAM crown
Correct Answer:- Option-B
Question98:-The anchorage in which the resistance of one or more dental units is utilized to move one or more opposing
dental units
A:-Simple anchorage
B:-Stationary anchorage
C:-Reciprocal anchorage
D:-Intra oral anchorage
Correct Answer:- Option-C
Question99:-Frankel's appliance is a
A:-Space maintainer
B:-Habit breaking appliance
C:-Myofunctional appliance
D:-Retainer
Correct Answer:- Option-C
Question100:-Shape memory is exhibited by
A:-Nickel-Titanium alloy
B:-Beta Titanium alloy
C:-Cobalt-Chromium alloy
D:-Nickel-Chromium alloy
Correct Answer:- Option-A