Description : Primary designation of steel is based on its (A) Hardness & tensile strength (B) Carbon content (C) Iron content (D) Alloying elements content
Last Answer : (D) Alloying elements content Sh
Description : Distortion or change in shape of a cast partial denture clasp during its clinical use probably indicates that the: A. Ductility was too low B. Hardness was too great C. Ultimate tensile strength was too low D. Tension temperature was too high E. Elastic limit was exceeded
Last Answer : E. Elastic limit was exceeded
Description : The graphite in grey irons exists in the form of flakes which act as stress-raisers under tensile loading and consequently grey irons have relatively low tensile strength and ductility. Still grey iron is extensively used in engineering. Why ?
Last Answer : (a) Cheapness. (B) Low melting point and high fluidity making it suitable for castings of intricate shape. (c) Relatively good erosion and corrosion resistance. (d) High damping capacity, with respect to vibration. (e) Relatively good mechanical properties under compressive loading.
Description : With increase in the carbon percentage in the steel, its (A) Hardness increases (B) Ductility reduces (C) Tensile strength increases (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and __________ is not affected. (A) Impact strength (B) Percent elongation (C) Hardness (D) Both 'b' & 'c'
Last Answer : (A) Impact strength
Description : Which of the following has the least value of ultimate tensile strength (UTS)? (A) Medium carbon steel (B) High carbon steel (C) Cast iron (D) Wrought iron Answer: Option C
Last Answer : (C) Cast iron
Description : Which of the following has the least value of ultimate tensile strength (UTS)? (A) Medium carbon steel (B) High carbon steel (C) Cast iron (D) Wrought iron
Last Answer : Option B
Description : . In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher (A) Densities (B) Melting point (C) Tensile strength (D) Hardness, rigidity & brittleness
Last Answer : (D) Hardness, rigidity & brittleness
Description : Shock resisting steels should possess high (A) Hardness (B) Toughness (C) Tensile strength (D) Wear resistance
Last Answer : (B) Toughness
Description : Manganese in steel affects its (A) Ductility (B) Tensile strength (C) Hardness (D) None of these
Last Answer : (B) Tensile strength
Description : In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________ increases. (A) Percentage elongation (B) Brinell hardness (C) Tensile strength (D) All 'a', 'b' & 'c'
Last Answer : (A) Percentage elongation
Description : Weld decay will cause which of the following problems? a) A reduced resistance to corrosion b) a lower tensile strength c) The toughness is reduced d) The hardness will increase
Last Answer : a) A reduced resistance to corrosion
Description : Tick of the property, which is different from the group (A) Ductility. (B) Resistivity. (C) Tensile strength. (D) Hardness.
Last Answer : (B) Resistivity
Description : Define the term: i)Tensile strength ii) Hardness iii) Ductility iv) Soldering
Last Answer : i)Tensile Strength : Tensile Strength is the ability of metal to carry a load without breaking. ii)Hardness :- Hardness is the ability of metal to resist wear or abrasion and resist penetration. ... a non ferrous alloy having melting point below 4000 c in between them is called as soldering.
Description : Cast iron has (A) Very high tensile strength (B) High ductility (C) High malleability (D) Elastic limit close to ultimate breaking strength
Last Answer : (D) Elastic limit close to ultimate breaking strength
Description : Presence of high phosphorous in cast iron increases its (A) Fluidity (B) Melting point (C) Shrinkage (D) Tensile strength
Last Answer : (A) Fluidity
Description : Cast iron has (A) High ductility (B) High malleability (C) Very high tensile strength (D) Its elastic limit very close to ultimate breaking strength
Last Answer : (D) Its elastic limit very close to ultimate breaking strength
Description : Which one has the maximum tensile strength out of the following? (A) Nodular cast iron (B) Pig iron (C) White cast iron (D) Grey cast iron
Last Answer : (A) Nodular cast iron
Description : Cast iron is having very high (A) Proximity between its elastic limit and ultimate breaking strength (B) Ductility (C) Tensile strength (D) All (A), (B) and (C)
Last Answer : (A) Proximity between its elastic limit and ultimate breaking strength
Description : Cast iron is (A) Used for making shock resisting parts (B) Manufactured in cupola and is brittle (C) Having compressive strength more than its tensile strength (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : High carbon content in the steel causes (A) Decrease in tensile strength but increase in ductility (B) Increase in tensile strength but decrease in ductility (C) Decrease in both tensile strength and ductility (D) Increase in both tensile strength and ductility
Last Answer : Answer: Option B
Description : Which of the following is (are) true? (A) Cast iron has poor tensile strength compared to steel (B) Failure of cast iron flywheel is sudden and total (C) Machinability of cast iron flywheel is poor compared to steel flywheel (D) All of the above
Last Answer : (D) All of the above
Description : Compared to mild steel, cast iron has (i) High compressive strength (ii) High tensile strength (iii) Low compressive strength (iv) Low tensile strength The correct answer is (A) (i) and (ii) (B) (ii) and (iii) (C) (iii) and (iv) (D) (i) and (iv)
Last Answer : Answer: Option D
Description : Which property is not required for shaft materials? a. High shear and tensile strength b. Good mach inability c. High fatigue strength d. Good cast ability
Last Answer : d. Good cast ability
Description : Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have (A) High electrical insulation properties (B) Sharp melting points (C) Low co-efficient of thermal expansion (D) Compressive strength much greater than their tensile strengths
Last Answer : (B) Sharp melting points
Description : A good metallurgical coke should have very low (A) Sulphur & phosphorous content (B) Porosity (C) Fusion point of its ash (D) Hardness & strength
Last Answer : (A) Sulphur & phosphorous content
Description : Maximum change in the hardness of martensite occurs in the carbon content range of __________ percent in steel. (A) 0.01 to 0.10 (B) 0.2 to 0.4 (C) 0.5 to 0.7 (D) 0.8 to 1.0
Last Answer : (B) 0.2 to 0.4
Description : Increasing the carbon content of steel (A) Reduces the upper shelf energy (B) Increasing the ductility transition temperature (C) Decreases brittleness (D) Decreases hardness
Last Answer : (B) Increasing the ductility transition temperature
Description : Addition of lead, sulphur and phosphorus to low carbon steel helps in improving its (A) Corrosion resistance (B) Tensile strength (C) Machinability (D) Compressive strength
Last Answer : (C) Machinability
Description : _______ property of a material is determined by the Herbert Pendulum device. (A) Hardness (B) Tensile (C) Toughness (D) Compressive
Last Answer : (A) Hardness
Description : __________ test is the appropriate test to determine whether a material is ductile or brittle. (A) Impact (B) Cupping (C) Hardness (D) Tensile
Last Answer : (A) Impact
Description : Temper brittleness of a material can be fairly detected by the __________ test. (A) Fatigue (B) Notched bar impact (C) Tensile (D) Hardness
Description : What is elasticity in polymers generally related to amount of hydrogen bonding between different subunits number of subunits in the polymer chain its greater tensile strength the synthetic composure?
Last Answer : amount of hydrogen bonding between different subunitsnumber of subunits in the polymer chainits greater tensile strengththe synthetic composure
Description : .The main advantage of amalgam with high content of Cu is: A. Better marginal sealing B. Less corrosion C. Better tensile strength D. Higher and immediate compressive strength
Last Answer : B. Less corrosion
Description : A Plain Carbon Steel Has Brinell Hardness Number (bhn) Of 180. What Are The Values Of Rc, Vhn And Ultimate Strength?
Last Answer : Rc = BHN/10 = 18, VHN = BHN = 180 Ultimate strength = 3.48 × BHN MPa = 620 MPa.
Description : Which of the following has the highest compressive strength? (A) Wrought iron (B) Cast iron (C) Mild steel (D) High carbon steel
Last Answer : (D) High carbon steel
Description : Annealing of cast iron (A) Softens it to facilitate machining (B) Decreases the free carbon (C) Increases the strength (D) None of these
Last Answer : Option A
Description : With increase in carbide/graphite ratio in cast iron, its (A) Hardness & brittleness increases (B) Ductility decreases (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) and (B)
Description : The most distinguished property of malleable cast iron is its high (A) Ductility (B) Hardness (C) Malleability (D) None of these
Last Answer : (A) Ductility
Description : Flywheel are generally made from (A) Cast Iron (B) High strength steel (C) Ceramics (D) All of the above
Description : Ball bearings are generally made of (A) Plain carbon steel (B) Chrome carbon steel (C) Stainless steel (D) Malleable cast iron
Last Answer : (B) Chrome carbon steel
Description : Steel balls for ball bearings are generally made of __________ steel. (A) Cast (B) Stainless (C) Free carbon (D) Carbon chrome
Last Answer : (D) Carbon chrome
Description : Galvanising is generally done on (A) Non-ferrous metals (B) Low carbon steel (C) Stainless steel (D) Cast iron
Last Answer : (B) Low carbon steel
Description : Maximum carbon content in cast iron is __________ percent. (A) 3.8 (B) 5.2 (C) 4.8 (D) 4.3
Last Answer : (D) 4.3
Description : How does carbon in steel affect the tensile strength?
Last Answer : Need answer
Description : The yield strength and tensile strength of low carbon steel may be improved by the addition of (A) Manganese (B) Chromium (C) Nickel (D) Vanadium
Description : Heating rubber with sulphur for the bet- terment of its properties ike tensile steqasbh: hardness; elasticity etc. is called as?
Last Answer : Vulcanisation
Description : Which of the following in NOT a quantitative test? a) Root bend b) Macro hardness c) Charpy d) Tensile
Last Answer : a) Root bend
Description : In a transverse WELD tensile test, if the break was in the weld metal, the sample would he: a) Rejected b) Acceptable if the UTS is equal to or greater than the specified UTS of the plate c) Retested d) Acceptable if the UTS is between 80 - 90% of the specified UTS of the plate
Last Answer : b) Acceptable if the UTS is equal to or greater than the specified UTS of the plate
Description : Which of the following is prone to cup and cone fracture? (A) Cast iron (B) Soft brass (C) Round specimen of ductile metal (D) Flat tensile specimen of ductile metal
Last Answer : Option C