The contraction (Gaseous) porosity in inlays is related to:** A. Overheating of the alloy B. Molten gases C. Diameter of the sprue D. Overheating of investment

The contraction (Gaseous) porosity in inlays is related to:**
A. Overheating of the alloy
B. Molten gases  
C. Diameter of the sprue
D. Overheating of investment
by

1 Answer

Answer :

B. Molten gases
by

Related questions

.In full dentures porosity in the most thickest area is due to:** A. Gaseous porosity B. Shrinkage porosity

Description : .In full dentures porosity in the most thickest area is due to:** A. Gaseous porosity B. Shrinkage porosity

Last Answer : A. Gaseous porosity

Porosity in acrylic dentures is caused by, A. Contraction porosity in thickest point of the denture B. Insufficient pressure during flasking

Description : Porosity in acrylic dentures is caused by,  A. Contraction porosity in thickest point of the denture  B. Insufficient pressure during flasking 

Last Answer : A. Contraction porosity in thickest point of the denture  B. Insufficient pressure during flasking 

Choose a statement that correctly defines the term AMALGAM: A. Amalgam is a metallic powder composed of silver, tin, copper and zinc B. Amalgam is an alloy of two or more metals that have been dissolved in each other in the molten state. C. Amalgam is an alloy of two or more metals, one of them is mercury D. Amalgam is a metallic substance in powder or tablet from that is mixed with mercury E. Amalgam is an alloy of two or more metals, one of them is tin

Description : Choose a statement that correctly defines the term AMALGAM: A. Amalgam is a metallic powder composed of silver, tin, copper and zinc B. Amalgam is an alloy of two or more metals that have been dissolved in ... is mixed with mercury E. Amalgam is an alloy of two or more metals, one of them is tin

Last Answer : C. Amalgam is an alloy of two or more metals, one of them is mercury

If the investment is burned out rapidly, what will happen: A. Back pressure porosity B. Cracking of the investment

Description : If the investment is burned out rapidly, what will happen: A. Back pressure porosity B. Cracking of the investment

Last Answer : B. Cracking of the investment

A partial denture that seats on the master cast but fails to seat correctly in the mouth is a result of, A. Contraction of the metal framework during casting B. Insufficient expansion of the investment material C. Distortion of impression D. Failure to block out unwanted undercuts

Description : A partial denture that seats on the master cast but fails to seat correctly in the mouth is a result of, A. Contraction of the metal framework during casting B. Insufficient expansion of the investment material C. Distortion of impression D. Failure to block out unwanted undercuts

Last Answer : C. Distortion of impression

The effect of the temperature rising above 100ºC on heat-cured denture-base acrylic resins is: A. Produces porosity on the external portion of the resin. B. Produces porosity on the internal portion of the resin. C. Produces porosity on the surface of the resin. D. Prevents porosity on the interior of the resin

Description : The effect of the temperature rising above 100ºC on heat-cured denture-base acrylic resins is: A. Produces porosity on the external portion of the resin. B. Produces porosity on the internal portion ... porosity on the surface of the resin. D. Prevents porosity on the interior of the resin

Last Answer : B. Produces porosity on the internal portion of the resin.

The advantage of firing porcelain in vacuum:** A. Reduces size of air-bubbles incorporated thus decreasing porosity B. Removes water before firing, increasing the hardness of porcelain C. Significantly lowers firing temperature

Description : The advantage of firing porcelain in vacuum:** A. Reduces size of air-bubbles incorporated thus decreasing porosity B. Removes water before firing, increasing the hardness of porcelain C. Significantly lowers firing temperature

Last Answer : A. Reduces size of air-bubbles incorporated thus decreasing porosity

The most common cause of porosity in porcelain jacket crowns is, A. Moisture contamination B. Excessive firing temperature C. Failure to anneal the platinum matrix D. Excessive condensation of the porcelain E. Inadequate condensation of the porcelain

Description : The most common cause of porosity in porcelain jacket crowns is, A. Moisture contamination B. Excessive firing temperature C. Failure to anneal the platinum matrix D. Excessive condensation of the porcelain E. Inadequate condensation of the porcelain

Last Answer : E. Inadequate condensation of the porcelain

Rough surface/Porosity of porcelain is a result of: A. Lack of compression/ condensation B. Sudden high temperature

Description : Rough surface/Porosity of porcelain is a result of: A. Lack of compression/ condensation B. Sudden high temperature

Last Answer : A. Lack of compression/ condensation

Uniform ramming of sand in green sand moulding process leads to (A) Reduced chance of gas porosity (B) Greater dimensional stability of the casting (C) Uniform flow of molten metal into the mould cavity (D) Less sand expansion type of casting defect

Description : Uniform ramming of sand in green sand moulding process leads to (A) Reduced chance of gas porosity (B) Greater dimensional stability of the casting (C) Uniform flow of molten metal into the mould cavity (D) Less sand expansion type of casting defect

Last Answer : Option B

Why would you invest the wax pattern as soon as possible in an indirect inlay fabrication: A. Minimise distortion B. Avoid contraction C. Avoid expansion

Description : Why would you invest the wax pattern as soon as possible in an indirect inlay fabrication: A. Minimise distortion B. Avoid contraction C. Avoid expansion

Last Answer : A. Minimise distortion

Which of the following DOES NOT cause depression of the mandible: A. Contraction of lateral pterygoid B. Contraction of temporalis C. Contraction of the suprahyoid muscles D. Contraction of the infrahyoid muscles E. Relaxation of all muscles so that the only forces on the mandible are the forces of

Description : Which of the following DOES NOT cause depression of the mandible: A. Contraction of lateral pterygoid B. Contraction of temporalis C. Contraction of the suprahyoid muscles D. Contraction of the ... E. Relaxation of all muscles so that the only forces on the mandible are the forces of

Last Answer : B. Contraction of temporalis

When dry cast is immersed in water saturated with calcium sulphate:** A. There is contraction B. There is negligible expansion C. There is definite expansion D. There is no change E. None of the above

Description : When dry cast is immersed in water saturated with calcium sulphate:** A. There is contraction B. There is negligible expansion C. There is definite expansion D. There is no change E. None of the above

Last Answer : B. There is negligible expansion

The contraction of gold alloys on solidifying is approximately: A. 0.5% B. 2.5% C. 1.40% D. 3%

Description : The contraction of gold alloys on solidifying is approximately: A. 0.5% B. 2.5% C. 1.40% D. 3%

Last Answer : C. 1.40%

Titanium is used in dentistry A. In a very pure form in implants B. In an alloy with aluminium in casting for crowns and bridges C. In an alloy with nickel in orthodontic wires D. A and B E. A, B and C

Description : Titanium is used in dentistry A. In a very pure form in implants B. In an alloy with aluminium in casting for crowns and bridges C. In an alloy with nickel in orthodontic wires D. A and B E. A, B and C

Last Answer : E. A, B and C

Which of the following Gold casting alloys are available: A. Medium alloy “Type II” B. ard alloy “Type III” C. Extra ard alloy “Type IV” D. All of the above

Description : Which of the following Gold casting alloys are available: A. Medium alloy “Type II” B. ard alloy “Type III” C. Extra ard alloy “Type IV” D. All of the above

Last Answer : D. All of the above

A large amalgam core is to be condensed around several pins in a vital molar tooth; what type of amalgam mix would you prefer: A. A large mix to ensure homogeneity B. A large with extra mercury to give easier manipulative qualities C. Several small mixes, sequentially triturated D. Several small mixes with varying mercury/alloy ratios E. A basic mix to which additional mercury is added as needed

Description : A large amalgam core is to be condensed around several pins in a vital molar tooth; what type of amalgam mix would you prefer: A. A large mix to ensure homogeneity B. A large with ... small mixes with varying mercury/alloy ratios E. A basic mix to which additional mercury is added as needed

Last Answer : C. Several small mixes, sequentially triturated

.In regard to Gold casting alloys which one is available for bridge A. Hard alloy “Type IV B. Type II

Description : .In regard to Gold casting alloys which one is available for bridge A. Hard alloy “Type IV B. Type II

Last Answer : A. Hard alloy “Type IV

Tropical sprue?

Description : Tropical sprue?

Last Answer : DefinitionTropical sprue is a condition seen in residents of, or visitors to tropical areas. It impairs the absorption of nutrients from the intestines, causing malabsorption.See also: Celiac ... level (serum)Iron level (serum)Stool examination for bacteria and parasitesUpper endoscopyUpper GI s

The passage between the nozzle and the __________ is called 'sprue' in case of injection moulding. (A) Runner (B) Cylinder (C) Mold (D) None of these

Description : The passage between the nozzle and the __________ is called 'sprue' in case of injection moulding. (A) Runner (B) Cylinder (C) Mold (D) None of these

Last Answer : (A) Runner

Celiac sprue is an example of which category of malabsorption? a) Mucosal disorders causing generalized malabsorption In addition to celiac sprue, regional enteritis and radiation enteritis are examples of mucosal disorders.

Description : Celiac sprue is an example of which category of malabsorption? a) Mucosal disorders causing generalized malabsorption In addition to celiac sprue, regional enteritis and radiation ... malabsorption Postoperative gastric or intestinal resection can result in development of malabsorption syndromes.

Last Answer : a) Mucosal disorders causing generalized malabsorption In addition to celiac sprue, regional enteritis and radiation enteritis are examples of mucosal disorders.

Elaborate why the section of a sprue reduces downwards.

Description : Elaborate why the section of a sprue reduces downwards.

Last Answer : A sprue section reduces downwards to a smaller size at its bottom will create a choke which will help keep the sprue full of molten metal. 

Alloy powder manufactured by the following process have spherical shapes. (A) Electrochemical deposition (B) Gaseous reduction (C) Atomisation (D) Mechanical attrition

Description : Alloy powder manufactured by the following process have spherical shapes. (A) Electrochemical deposition (B) Gaseous reduction (C) Atomisation (D) Mechanical attrition

Last Answer : (C) Atomisation

What is the function of gypsum-binder in the investment:** A. Setting and hydroscopic B. Strength and rigidity

Description : What is the function of gypsum-binder in the investment:** A. Setting and hydroscopic B. Strength and rigidity

Last Answer : B. Strength and rigidity

The setting expansion of casting investment is approximately A. 0 to 0.1% B. 0.1 to 0.5% C. 0.5 to 1% D. 1.1 to 1.6%

Description : The setting expansion of casting investment is approximately A. 0 to 0.1% B. 0.1 to 0.5% C. 0.5 to 1% D. 1.1 to 1.6%

Last Answer : B. 0.1 to 0.5%

Highly porous refractory bricks are (A) Less susceptible to chemical attack by molten fluxes and gases etc (B) Very strong (C) Having very high thermal conductivity (D) None of these

Description : Highly porous refractory bricks are (A) Less susceptible to chemical attack by molten fluxes and gases etc (B) Very strong (C) Having very high thermal conductivity (D) None of these

Last Answer : (D) None of these

Pick out the wrong statement. (A) Cp of monatomic gases such as metallic vapor is about 5 kcal/kg.atom (B) The heat capacity of solid inorganic substance is exactly equal to the heatcapacity of the substance in the molten state(C) There is an increase in entropy, when a spontaneous change occurs in anisolated system(D) At absolute zero temperature, the heat capacity for many pure crystallinesubstances is zero

Description : Pick out the wrong statement. (A) Cp of monatomic gases such as metallic vapor is about 5 kcal/kg.atom (B) The heat capacity of solid inorganic substance is exactly equal to the ... isolated system (D) At absolute zero temperature, the heat capacity for many pure crystalline substances is zero

Last Answer : (C) There is an increase in entropy, when a spontaneous change occurs in an isolated system

Sodium sulphur battery is a type of molten-salt battery constructed from _____ sodium and sulphur. • Solid • Liquid • Plasma • Gases

Description : Sodium sulphur battery is a type of molten-salt battery constructed from _____ sodium and sulphur. • Solid • Liquid • Plasma • Gases

Last Answer : • Liquid

A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle system (in SI units) is given below : Δ P/L = 375 × 10 3 VOM + 10.94 × 10 6 V2 OM (SI units) If water is to be used as the fluidising medium, the minimum fluidisation velocity, VOM is (A) 12 mm/s (B) 16 mm/s (C) 24 mm/s (D) 28 mm/s

Description : A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle ... fluidisation velocity, VOM is (A) 12 mm/s (B) 16 mm/s (C) 24 mm/s (D) 28 mm/s

Last Answer : (B) 16 mm/s

A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle system (in SI units) is given below: Δ P/L = 375 × 10 3 VOM + 10.94 × 10 6 V2 OM (SI units) If water is to be used as the fluidising medium, in actual operation, the above bed has a height = 1 m. What is the porosity of the fluidised bed? (A) 0.2 (B) 0.5 (C) 0.7 (D) 0.8

Description : A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle system ... What is the porosity of the fluidised bed? (A) 0.2 (B) 0.5 (C) 0.7 (D) 0.8

Last Answer : (C) 0.7

BET apparatus is used to determine the (A) Specific surface of a porous catalyst (B) Pore size distribution (C) Pore diameter (D) Porosity of the catalyst bed

Description : BET apparatus is used to determine the (A) Specific surface of a porous catalyst (B) Pore size distribution (C) Pore diameter (D) Porosity of the catalyst bed

Last Answer : (A) Specific surface of a porous catalyst

A patient is complaining of an open sore on the buccal mucosa. The lesion is painless, ulcerated, has indurated margins, 1.5 cm in diameter, covered by greyish-white exudate, enlarged lymph nodes and tender, negative tuberculin test and positive serology. The diagnosis is

Description : A patient is complaining of an open sore on the buccal mucosa. The lesion is painless, ulcerated, has  indurated margins, 1.5 cm in diameter, covered by greyish-white exudate, enlarged lymph nodes  and tender, negative tuberculin test and positive serology. The diagnosis is

Last Answer : Chancre /Primary lesion of syphilis 

cyst at the apex of an upper central incisor measuring 1 cm in diameter is visualized in radiograph and confirmed by aspiration biopsy; which method of treatment would you consider?** A. Extraction of the central incisor and retrieving the cyst through the socket B. Exteriorizing the cyst through the buccal bone and mucosa C. Making a mucoperiosteal flap and removing the cyst through an opening made in the alveolar bone, followed by tooth removal. D. Making a mucoperiosteal flap and removing the cyst through an opening made in the alveolar bone, followed by endodontic treatment. E. Routine orthograde endodontic treatment followed by observation.

Description : cyst at the apex of an upper central incisor measuring 1 cm in diameter is visualized in radiograph and confirmed by aspiration biopsy; which method of treatment would you consider?** ... bone, followed by endodontic treatment. E. Routine orthograde endodontic treatment followed by observation.

Last Answer : D. Making a mucoperiosteal flap and removing the cyst through an opening made in the alveolar bone, followed by endodontic treatment.

Which of the following processes is not an example of adsorption applied to gaseous separations? (A) Recovery of valuable solvent vapors from dilute mixture with air and other gases (B) Dehumidification of air and gas (C) Removal of objectionable odour and impurities from industrial gases (D) Decolouration of yellow glycerine

Description : Which of the following processes is not an example of adsorption applied to gaseous separations? (A) Recovery of valuable solvent vapors from dilute mixture with air and ... Removal of objectionable odour and impurities from industrial gases (D) Decolouration of yellow glycerine

Last Answer : (D) Decolouration of yellow glycerine

________ fuels produce least amount of harmful gases and do not leave behind solid residue on combustion. a) solid b)gaseous c)liquid d )semi-solid

Description : ________ fuels produce least amount of harmful gases and do not leave behind solid residue on combustion. a) solid b)gaseous c)liquid d )semi-solid

Last Answer : b)gaseous

"Under the same conditions of temperature and pressure, the volumes of reacting gases and of their gaseous products are expressed in ratios of small whole numbers." This law is attributed to: w) Dalton x) Gay-Lussac y) Ramsay z) Avogadro

Description : "Under the same conditions of temperature and pressure, the volumes of reacting gases and of their gaseous products are expressed in ratios of small whole numbers." This law is attributed to: w) Dalton x) Gay-Lussac y) Ramsay z) Avogadro

Last Answer : ANSWER: X -- GAY-LUSSAC

Explain the left hemisphere area related to language?

Description : Explain the left hemisphere area related to language?

Last Answer : The first language area within the left hemisphere to be discovered is Broca's area, named after Paul Broca, who discovered the area while studying patients with aphasia, a language disorder. Broca's area doesn't ... the difference between "The boy was hit by the girl" and "The girl hit the boy."

Which area of the brain is related to language?

Description : Which area of the brain is related to language?

Last Answer : The two hemispheres are thought to contribute to the processing and understanding of language: the left hemisphere processes the linguistic meaning of prosody (or, the rhythm, stress, and intonation ... brains are capable of adapting to difficult circumstances, if the df.mage occurs early enough.

Describe related problems to Tourette syndrome (TS)?

Description : Describe related problems to Tourette syndrome (TS)?

Last Answer : People with TS are more likely to have any combination of the following problems: •Attention-Deficit/Hyperactivity Disorder (ADHD) •Difficulties with Impulse Control (disinhibition) •Obsessive-Compulsive Disorder (OCD) •Various Learning Disabilities (such as dyslexia) •Various Sleep Disorders

Which is NOT usually related to gingival inflammation in children? A. Endocrine disturbance B. Viral infection C. Mouth breathing D. Spirochetal infection E. Streptococcal infection

Description : Which is NOT usually related to gingival inflammation in children? A. Endocrine disturbance B. Viral infection C. Mouth breathing D. Spirochetal infection E. Streptococcal infection

Last Answer : D. Spirochetal infection

What is NOT related to the normal aging process? A. Progressive bone loss B. Reduced elasticity of muscles C. Decreased elasticity of the skin D. Lower pain threshold

Description : What is NOT related to the normal aging process? A. Progressive bone loss B. Reduced elasticity of muscles C. Decreased elasticity of the skin D. Lower pain threshold

Last Answer : D. Lower pain threshold

A 37 years-old patient presents with paroxysmal pain on the left eye that he thinks is related to his maxillary posterior teeth. The pain comes in recurrent bursts and is aggravated by stress and alcohol. Oral exam is negative. The probable diagnosis is: A. Migraine B. Cluster headache C. Trigeminal neuralgia D. Temporal neuritis

Description : A 37 years-old patient presents with paroxysmal pain on the left eye that he thinks is related to his maxillary posterior teeth. The pain comes in recurrent bursts and is aggravated by stress and ... diagnosis is: A. Migraine B. Cluster headache C. Trigeminal neuralgia D. Temporal neuritis

Last Answer : B. Cluster headache

Absence of clearly defined crystal lamina dura is because: A. Pathognomonic of periodontal disease B. Indicative of attachment loss C. Associated with periodontal pocket D. Commonly related to radiograph angulation

Description : Absence of clearly defined crystal lamina dura is because: A. Pathognomonic of periodontal disease B. Indicative of attachment loss C. Associated with periodontal pocket D. Commonly related to radiograph angulation

Last Answer : D. Commonly related to radiograph angulation

The principal factor involved in oral para-function is related to: A. Periods of stress B. Occlusal pre-maturities during mandibular closure

Description : The principal factor involved in oral para-function is related to: A. Periods of stress B. Occlusal pre-maturities during mandibular closure

Last Answer : B. Occlusal pre-maturities during mandibular closure

Which one of the following types of pain is most likely to be associated with craniomandibular disorders: A. Exacerbated pain by hot or cold food B. Keeps patient awake at night C. Associated with muscle tenderness D. Associated with trigger spots related to the trigeminal nerve

Description : Which one of the following types of pain is most likely to be associated with craniomandibular disorders: A. Exacerbated pain by hot or cold food B. Keeps patient awake at night C. Associated with muscle tenderness D. Associated with trigger spots related to the trigeminal nerve

Last Answer : C. Associated with muscle tenderness

The Fovea Palatinae are: A. Foramina covering the lesser palatine nerves and vessels B. Morphologically related to the formation of the premaxilla C. Located on either sides of the midline close to the junction of the hard and soft palate D. Closely related to the rugae of the palate

Description : The Fovea Palatinae are: A. Foramina covering the lesser palatine nerves and vessels B. Morphologically related to the formation of the premaxilla C. Located on either sides of the midline close to the junction of the hard and soft palate D. Closely related to the rugae of the palate

Last Answer : C. Located on either sides of the midline close to the junction of the hard and soft palate

The term TUGback is related to ( “When used in connection with a master Gutta Percha cone in endodontics)” : A. Tensile strength of the gutta percha B. Consistency of gutta percha C. Size of the cone D. Fit of the cone in the apical 1 or 2 mm E. Length of the cone

Description : The term TUGback is related to ( “When used in connection with a master Gutta Percha cone in endodontics)” : A. Tensile strength of the gutta percha B. Consistency of gutta percha C. Size of the cone D. Fit of the cone in the apical 1 or 2 mm E. Length of the cone

Last Answer : D. Fit of the cone in the apical 1 or 2 mm

Which of the following is true regarding gingivosis (Desquamative gingivitis) A. It is caused by hormononal imbalance B. Is seen only at or after menopause C. Is frequently caused by lichen planus D. Is a variant pregnancy gingivitis E. Is related to nutritional disturbance

Description : Which of the following is true regarding gingivosis (Desquamative gingivitis) A. It is caused by hormononal imbalance B. Is seen only at or after menopause C. Is frequently caused by lichen planus D. Is a variant pregnancy gingivitis E. Is related to nutritional disturbance

Last Answer : C. Is frequently caused by lichen planus