The most serious manufacturing defect from fracture toughness point of view is (A) Surface roughness (B) Pores (C) Spherical inclusion (D) Crack

The most serious manufacturing defect from fracture toughness point of
view is
(A) Surface roughness
(B) Pores
(C) Spherical inclusion
(D) Crack
by

1 Answer

Answer :

Option D
by

Related questions

Which of the following is not a characteristic observed in material failure by fatigue fracture? (A) Plastic deformation of material does not occur (B) Initiation of crack from below the surface does not occur (C) Initiation of crack occurs on the surface of the machine part (D) Presence of both rough & smooth zone with conchoidal markings in smooth zone of the surface

Description : Which of the following is not a characteristic observed in material failure by fatigue fracture? (A) Plastic deformation of material does not occur (B) Initiation of crack from below the surface does ... (D) Presence of both rough & smooth zone with conchoidal markings in smooth zone of the surface

Last Answer : Option B

Amount of energy that a material can absorb before its fracture is a measure of its (A) Toughness (B) Resilience (C) Malleability

Description : Amount of energy that a material can absorb before its fracture is a measure of its (A) Toughness (B) Resilience (C) Malleability

Last Answer : (A) Toughness

Early tapping will cause defect of? (i) No defect (ii) Inclusion of slag* (iii) Inclusion of aluminium (iv) Inclusion of ferrou

Description : Early tapping will cause defect of? (i) No defect (ii) Inclusion of slag* (iii) Inclusion of aluminium (iv) Inclusion of ferrou

Last Answer : (ii) Inclusion of slag*

A major difference between light cured and chemical cured composite is that during setting or in function the light cured material tends to:******** VERY IMP A. Seal the margins better and completely B. Exhibit less wear on time C. Undergo greater colour change D. Shrink more rapidly E. Posses greater fracture toughness

Description : A major difference between light cured and chemical cured composite is that during setting or in function the light cured material tends to:******** VERY IMP A. Seal the margins better and ... on time C. Undergo greater colour change D. Shrink more rapidly E. Posses greater fracture toughness

Last Answer : D. Shrink more rapidly

The defect of a lens whereby rays of white light proceeding from a point get dispersed into their components and conveyed to various foci, forming a blurred and coloured image is known as (A) Chromatic aberration (B) Spherical aberration (C) Astigmatism (D) Coma

Description : The defect of a lens whereby rays of white light proceeding from a point get dispersed into their components and conveyed to various foci, forming a blurred and coloured image is known as (A) Chromatic aberration (B) Spherical aberration (C) Astigmatism (D) Coma

Last Answer : (A) Chromatic aberration

What indicates for a periapical surgery: A. Where performing an endodontic treatment on existing root canal filling may lead to fracture of the root B. When root canal treatment is faulty C. When there is danger of involving other structures D. When the bony defect is so extensive that the edges of the incisors will collapse E. None of the above

Description : What indicates for a periapical surgery: A. Where performing an endodontic treatment on existing root canal filling may lead to fracture of the root B. When root canal treatment is faulty C. When ... bony defect is so extensive that the edges of the incisors will collapse E. None of the above

Last Answer : A. Where performing an endodontic treatment on existing root canal filling may lead to fracture of the root

If code of a fracture is OFW-422 then it means. (i) AT welding with transverse crack. (ii) Flash butt welding with transverse crack. (iii) At welding with horizontal crack.* (iv) None of the above.

Description : If code of a fracture is OFW-422 then it means. (i) AT welding with transverse crack. (ii) Flash butt welding with transverse crack. (iii) At welding with horizontal crack.* (iv) None of the above.

Last Answer : (iii) At welding with horizontal crack.*

A lens or combination of lenses in which the following defect is completely eliminated is called aplanatic (A) Spherical aberration (B) Chromatic aberration (C) Coma (D) Astigmatism

Description : A lens or combination of lenses in which the following defect is completely eliminated is called aplanatic (A) Spherical aberration (B) Chromatic aberration (C) Coma (D) Astigmatism

Last Answer : (A) Spherical aberration

Pick out the wrong statement. (A) The emissivity of a surface decreases, if it gets corroded by atmospheric environment (B) The emissivity of a surface increases with increase in surface roughness (C) The emissivity of a polished surface is quite low (D) The emissivity of a non-metallic surface decreases with increase in the temperature

Description : Pick out the wrong statement. (A) The emissivity of a surface decreases, if it gets corroded by atmospheric environment (B) The emissivity of a surface increases with increase in surface roughness ... quite low (D) The emissivity of a non-metallic surface decreases with increase in the temperature

Last Answer : (A) The emissivity of a surface decreases, if it gets corroded by atmospheric environment

Transition from laminar flow to turbulent flow is aided by the (A) Surface roughness and curvature (i.e. sharp corners) (B) Vibration (C) Pressure gradient and the compressibility of the flowing medium (D) All (A), (B) & (C)

Description : Transition from laminar flow to turbulent flow is aided by the (A) Surface roughness and curvature (i.e. sharp corners) (B) Vibration (C) Pressure gradient and the compressibility of the flowing medium (D) All (A), (B) & (C)

Last Answer : (D) All (A), (B) & (C)

Pressure drag does not depend upon the(A) Roughness of surface of the body (B) Pressure of main flow only (C) Length of the body in flow direction (D) All (A), (B) and (C)

Description : Pressure drag does not depend upon the (A) Roughness of surface of the body (B) Pressure of main flow only (C) Length of the body in flow direction (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ε0 ) with age/time (t) (where, ε = roughness of the surface after time't'. α = a co-efficient to be experimentally determined)? (A) ε = ε0 + α.t (B) ε = ε0 + α.t 2 (C) ε = ε0 + α.t 3 (D) ε = ε0 + α.t

Description : Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ε0 ) with age/time (t) (where, ε = roughness of the surface after time't'. α = a co-efficient to be experimentally determined ... ε = ε0 + α.t 2 (C) ε = ε0 + α.t 3 (D) ε = ε0 + α.t

Last Answer : (A) ε = ε0 + α.t

A teacher has serious defect is he/she Options: A) is physically handicapped B) belongs to low socio-economic status C) has weak personality D) has immature mental development

Description : A teacher has serious defect is he/she Options: A) is physically handicapped B) belongs to low socio-economic status C) has weak personality D) has immature mental development

Last Answer : D) has immature mental development

depends upon The Chezy’s constant C in the formula V = C A. Size of the sewer B. Shape of the sewer C. Roughness of sewer surface D. All the above

Description : depends upon The Chezy’s constant C in the formula V = C A. Size of the sewer B. Shape of the sewer C. Roughness of sewer surface D. All the above

Last Answer : ANS: D

Roughness index of roads, is expressed as (A) Size of the stone on the pavement (B) Number of patches on the pavement (C) Cumulative deformation of surface per horizontal distance (D) Type of the road surface

Description : Roughness index of roads, is expressed as (A) Size of the stone on the pavement (B) Number of patches on the pavement (C) Cumulative deformation of surface per horizontal distance (D) Type of the road surface

Last Answer : Answer: Option C

What is the maximum surface roughness permitted by ASME B31.1 for the sidewall of ring grooves? a) 63 µ in b) 125 µ in. c) 250 µ in. d) 400 µ in

Description : What is the maximum surface roughness permitted by ASME B31.1 for the sidewall of ring grooves? a) 63 µ in b) 125 µ in. c) 250 µ in. d) 400 µ in

Last Answer : a) 63 µ in

What is the maximum surface roughness for tongue and groove and small male and female gasket surfaces? a) 63 µ in b) 125 µ in c) 250 µ in d) 400 µ in

Description : What is the maximum surface roughness for tongue and groove and small male and female gasket surfaces? a) 63 µ in b) 125 µ in c) 250 µ in d) 400 µ in

Last Answer : b) 125 µ in

In regard to the enamel surface: A. It is a perfect substance for bonding B. It does not conform to the bonding requirements C. It is the most inorganic, rough part D. It is free from contamination and roughness E. None of the above

Description : In regard to the enamel surface: A. It is a perfect substance for bonding B. It does not conform to the bonding requirements C. It is the most inorganic, rough part D. It is free from contamination and roughness E. None of the above

Last Answer : B. It does not conform to the bonding requirements

________ refer to the surface roughness of the tool a) Micro shape c) Edge shape b) Macro shape d) Gross shape

Description : ________ refer to the surface roughness of the tool a) Micro shape c) Edge shape b) Macro shape d) Gross shape

Last Answer : a) Micro shape

The heat dissipated by from a surface depends upon its temperature and its characteristics like colour, roughness etc. (a) conduction (b) convection (c) radiation (d) any ofthe above

Description : The heat dissipated by from a surface depends upon its temperature and its characteristics like colour, roughness etc. (a) conduction (b) convection (c) radiation (d) any ofthe above

Last Answer : (c) radiation

Was a ruler used to crack the knuckles of those involved in the serious referee tackling at a high school football game?

Description : Was a ruler used to crack the knuckles of those involved in the serious referee tackling at a high school football game?

Last Answer : Well, the students can kiss their chances of a sports scholarship goodbye after being suspended from extracurriculars for the whole school year. Especially the senior.

In a patient with dense cataract and poor retina view, the following tests can be used to test the macular function: a. relative afferent pupillary defect b. laser interferometry c. Haidinger brushes d. Visual evoked potential

Description : In a patient with dense cataract and poor retina view, the following tests can be used to test the macular function: a. relative afferent pupillary defect b. laser interferometry c. Haidinger brushes d. Visual evoked potential

Last Answer : Visual evoked potential

-------------- does not affect the perfection of the crystal. a) Point defect b) Line defect c) Surface defect d) Volume defect

Description : -------------- does not affect the perfection of the crystal. a) Point defect b) Line defect c) Surface defect d) Volume defect

Last Answer : a) Point defect

The water, retained by the soil in capillary pores (micropores), against gravity (-1/3 to - 31 bar) by the force of surface tension

Description : The water, retained by the soil in capillary pores (micropores), against gravity (-1/3 to - 31 bar) by the force of surface tension

Last Answer : Ans.Capillary water

Name the tiny pores present on the surface of leaves in plants. (1) Pits (2) Stomata (3) Trichomes (4) Hydathodes

Description : Name the tiny pores present on the surface of leaves in plants. (1) Pits (2) Stomata (3) Trichomes (4) Hydathodes

Last Answer : (2) Stomata Explanation: Stomata are pores in the surface of the leaf. The pore is surrounded by two guard cells. When these two guard cells take up water, they bend and open up the pore between them.

Name the tiny pores present on the surface of leaves in plants. (1) Pits (2) Stomata (3) Trichomes (4) Hydathodes

Description : Name the tiny pores present on the surface of leaves in plants. (1) Pits (2) Stomata (3) Trichomes (4) Hydathodes

Last Answer : (2) Stomata Explanation: Stomata are tiny openings or pores in plant tissue that allow for gas exchange. Stomata are typically found in plant leaves but can also be found in some stems.

The aggregate containing moisture in pores and having its surface dry, is known as (A) Moist aggregates (B) Very dry aggregates (C) Dry aggregates (D) Saturated surface dry aggregate

Description : The aggregate containing moisture in pores and having its surface dry, is known as (A) Moist aggregates (B) Very dry aggregates (C) Dry aggregates (D) Saturated surface dry aggregate

Last Answer : Answer: Option D

An aggregate having all the pores are filled with water and also having its surface wet is called (a) Dry aggregate (b) Moist aggregate (c) Saturated surface dry aggregate (d) All the above

Description : An aggregate having all the pores are filled with water and also having its surface wet is called (a) Dry aggregate (b) Moist aggregate (c) Saturated surface dry aggregate (d) All the above

Last Answer : (b) Moist aggregate

An aggregate having all the pores filled with water but having dry surface is called . (a) Dry aggregate (b) Moist aggregate (c) Saturated surface dry aggregate (d) All the above

Description : An aggregate having all the pores filled with water but having dry surface is called . (a) Dry aggregate (b) Moist aggregate (c) Saturated surface dry aggregate (d) All the above

Last Answer : (c) Saturated surface dry aggregate

An aggregate which may contain some moisture in the pores but having dry surface is known as. (a) Dry aggregate (b) Moist aggregate (c) Saturated surface dry aggregate (d) All the above

Description : An aggregate which may contain some moisture in the pores but having dry surface is known as. (a) Dry aggregate (b) Moist aggregate (c) Saturated surface dry aggregate (d) All the above

Last Answer : (a) Dry aggregate

Name the tiny pores present on the surface of leaves in plants. (1) Pits (2) Stomata (3) Trichomes (4) Hydathodes

Description : Name the tiny pores present on the surface of leaves in plants. (1) Pits (2) Stomata (3) Trichomes (4) Hydathodes

Last Answer : Stomata

What reflecting surface forms a geometrically perfect image of a point source located at infinity (such as that approximated by a star)? w) Paraboloid x) Ellipsoid y) spherical z) Hyperboloid

Description : What reflecting surface forms a geometrically perfect image of a point source located at infinity (such as that approximated by a star)? w) Paraboloid x) Ellipsoid y) spherical z) Hyperboloid

Last Answer : ANSWER: W -- PARABOLOID

The friction factor for turbulent flow in a hydraulically smooth pipe (A) Depends only on Reynolds number (B) Does not depend on Reynolds number (C) Depends on the roughness (D) None of these

Description : The friction factor for turbulent flow in a hydraulically smooth pipe (A) Depends only on Reynolds number (B) Does not depend on Reynolds number (C) Depends on the roughness (D) None of these

Last Answer : (A) Depends only on Reynolds number

The friction factor is (A) Always inversely proportional to the Reynolds number (B) Not dimensionless (C) Not dependent on the roughness of the pipe (D) None of these

Description : The friction factor is (A) Always inversely proportional to the Reynolds number (B) Not dimensionless (C) Not dependent on the roughness of the pipe (D) None of these

Last Answer : (D) None of these

During ageing of fluid carrying pipes, the (A) Pipe becomes smoother with use (B) Friction factor increases linearly with time (C) Absolute roughness decreases with time (D) Absolute roughness increases linearly with time

Description : During ageing of fluid carrying pipes, the (A) Pipe becomes smoother with use (B) Friction factor increases linearly with time (C) Absolute roughness decreases with time (D) Absolute roughness increases linearly with time

Last Answer : (D) Absolute roughness increases linearly with time

Friction factor for a hydraulically smooth pipe at NRe = 2100 is f1 . If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of NRe , will (A) Increase (B) Decrease (C) Remain unchanged (D) Increase or decrease depending on the pipe material

Description : Friction factor for a hydraulically smooth pipe at NRe = 2100 is f1 . If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of NRe , will (A) Increase (B) Decrease (C) Remain unchanged (D) Increase or decrease depending on the pipe material

Last Answer : (A) Increase

Location of vena-contracta in an orificemeter does not depend upon the (A) Type of orifice (B) Density, viscosity & compressibility of the fluid (C) Ratio of pipe diameter to orifice diameter (D) Pipe roughness

Description : Location of vena-contracta in an orificemeter does not depend upon the (A) Type of orifice (B) Density, viscosity & compressibility of the fluid (C) Ratio of pipe diameter to orifice diameter (D) Pipe roughness

Last Answer : (A) Type of orifice

In turbulent flow, a rough pipe has the same friction factor as a smooth pipe (A) In the zone of complete turbulence (B) When the roughness projections are much smaller than the thickness of the laminar film (C) Everywhere in the transition zone (D) When the friction factor is independent of the Reynold's number

Description : In turbulent flow, a rough pipe has the same friction factor as a smooth pipe (A) In the zone of complete turbulence (B) When the roughness projections are much smaller than the thickness of ... ) Everywhere in the transition zone (D) When the friction factor is independent of the Reynold's number

Last Answer : (B) When the roughness projections are much smaller than the thickness of the laminar film

Which of the following quantities are computed by using the hydraulic radius for non-circular ducts? (A) Velocity and relative roughness (B) Head loss and velocity (C) Reynold number, relative roughness and head loss (D) Reynolds number and friction factor

Description : Which of the following quantities are computed by using the hydraulic radius for non-circular ducts? (A) Velocity and relative roughness (B) Head loss and velocity (C) Reynold number, relative roughness and head loss (D) Reynolds number and friction factor

Last Answer : (C) Reynold number, relative roughness and head loss

Pick out the wrong statement: (A) Greater is the kinematic viscosity of the liquid, greater is the thickness of the boundary layer (B) Blowers develop a maximum pressure of 2 atmospheres (C) Friction losses in pipe fittings are generally expressed in terms of velocity heads (D) Fanning friction factor in case of turbulent flow of liquids in pipe depends upon relative roughness & Reynolds number

Description : Pick out the wrong statement: (A) Greater is the kinematic viscosity of the liquid, greater is the thickness of the boundary layer (B) Blowers develop a maximum pressure of 2 atmospheres ( ... factor in case of turbulent flow of liquids in pipe depends upon relative roughness & Reynolds number

Last Answer : (C) Friction losses in pipe fittings are generally expressed in terms of velocity heads

In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of (A) Relative roughness (B) Absolute roughness (C) Friction co-efficient for flows at equal Reynold number (D) All (A), (B) & (C)

Description : In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said ... co-efficient for flows at equal Reynold number (D) All (A), (B) & (C)

Last Answer : (C) Friction co-efficient for flows at equal Reynold number

The schedule number of a pipe is an indication of its (A) Size (B) Roughness (C) Material density (D) Wall thickness

Description : The schedule number of a pipe is an indication of its (A) Size (B) Roughness (C) Material density (D) Wall thickness

Last Answer : (D) Wall thickness

Isothermal turbulent flow of a fluid results in decrease of its pressure, which depends on the (A) Wall roughness (B) Reynolds number (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Isothermal turbulent flow of a fluid results in decrease of its pressure, which depends on the (A) Wall roughness (B) Reynolds number (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

The losses in open channel flow generally vary as the (A) Inverse of the roughness (B) First power of the roughness (C) Square of the velocity (D) Inverse square of hydraulic radius

Description : The losses in open channel flow generally vary as the (A) Inverse of the roughness (B) First power of the roughness (C) Square of the velocity (D) Inverse square of hydraulic radius

Last Answer : (B) First power of the roughness

In the complete turbulence zone (in rough pipes), the (A) Rough and smooth pipes have the same friction factor (B) Laminar film covers the roughness projections (C) Friction factor depends upon NRe only (D) Friction factor is independent of the relative roughness

Description : In the complete turbulence zone (in rough pipes), the (A) Rough and smooth pipes have the same friction factor (B) Laminar film covers the roughness projections (C) Friction factor depends upon NRe only (D) Friction factor is independent of the relative roughness

Last Answer : (D) Friction factor is independent of the relative roughness

Fanning friction factor for laminar flow of fluid in a circular pipe is (A) Not a function of the roughness of pipe wall (B) Inversely proportional to Reynolds number (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Fanning friction factor for laminar flow of fluid in a circular pipe is (A) Not a function of the roughness of pipe wall (B) Inversely proportional to Reynolds number (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

Auto collimator is used to check (A) Flatness (B) Angle (C) Rotor balancing (D) Roughness

Description : Auto collimator is used to check (A) Flatness (B) Angle (C) Rotor balancing (D) Roughness

Last Answer : (B) Angle

Friction factor for fluid flow in pipe does not depend upon the (A) Pipe length (B) Pipe roughness (C) Fluid density & viscosity (D) Mass flow rate of fluid

Description : Friction factor for fluid flow in pipe does not depend upon the (A) Pipe length (B) Pipe roughness (C) Fluid density & viscosity (D) Mass flow rate of fluid

Last Answer : A) Pipe length

What is a good estimate for the absolute roughness for epoxy lined carbon steel pipe?

Description : What is a good estimate for the absolute roughness for epoxy lined carbon steel pipe?

Last Answer : The specific roughness for welded, seamless steel is .0002 ft. PVC has a specific roughness of 0.000005 ft. You may also want to consider using the Hazen-Williams formula, which lists a ... for cement-lined cast iron piping. You need to decide which is more conservative for your application.

An 8 years-old child who has sustained a fracture of maxillary permanent central incisor in which 2mm of the pulp is exposed presents for treatment three hours after injury. Which of the following should be considered? a- Remove the surface 1. 2 mm of pulp tissue and place calcium hydroxide. b- Place calcium hydroxide directly on the exposed pulp. c- Pulpotomy using formocresol. d- Pulpectomy and immediate root filling. e- Pulpectomy and apexification.

Description : An 8 years-old child who has sustained a fracture of maxillary permanent central incisor in which 2mm of the pulp is exposed presents for treatment three hours after injury. Which of the ... - Pulpotomy using formocresol. d- Pulpectomy and immediate root filling. e- Pulpectomy and apexification.

Last Answer : a- Remove the surface 1. 2 mm of pulp tissue and place calcium hydroxide