Description : The highest stress that a material can withstand for a specified length of time without excessive deformation is called the __________ strength. (A) Creep (B) Endurance (C) Fatigue (D) None of these
Last Answer : Option A
Description : The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the (A) Fatigue strength (B) Creep strength (C) Resilience (D) Endurance limit
Last Answer : D) Endurance limit
Description : Reduction in the grain size reduces the __________ of the material. (A) Fatigue resistance (B) Tensile strength (C) Creep resistance (D) All (A), (B) & (C)
Last Answer : (C) Creep resistance
Last Answer : (D) All (A), (B) & (C)
Description : Slow plastic deformation of metals under a constant stress is termed as __________ failure. (A) Fatigue (B) Endurance (C) Creep (D) None of these
Last Answer : (C) Creep
Description : Failure of a material is termed as fatigue failure, if it fails below the yield point. The resistance to fatigue failure of a material is measured by the (A) Ultimate tensile strength (U.T.S.) (B) Endurance limit (C) Elastic limit (D) None of these
Last Answer : (B) Endurance limit
Description : Fatigue resistance of a material is measured by the (A) Elastic limit (B) Ultimate tensile strength (C) Young's modulus (D) Endurance limit
Last Answer : (D) Endurance limit
Description : Yield strength of a material is determined by the __________ test. (A) Creep (B) Tension (C) Compression (D) Endurance
Last Answer : Option B
Description : On decreasing the grain size of a polycrystalline material, the property most likely to deteriorate is (A) Creep (B) Toughness (C) Tensile strength (D) Fatigue
Last Answer : (B) Toughnes
Description : When a material is subjected to fatigue loading, the ratio of the endurance limit to the ultimate tensile strength is (a) 0.20 (b) 0.35 (c) 0.50 (d) 0.65
Last Answer : (c) 0.50
Description : Factor of safety for fatigue loading is the ratio of (a) elastic limit to the working stress (b) Young's modulus to the ultimate tensile strength (c) endurance limit to the working stress (d) elastic limit to the yield point
Last Answer : (c) endurance limit to the working stress
Description : The resistance to fatigue of a material is measured by (a) elastic limit (b) Young's modulus (c) ultimate tensile strength (d) endurance limit
Last Answer : (d) endurance limit
Description : The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to (a) static load (b) dynamic load (c) static as well as dynamic load (d) completely reversed load
Last Answer : (d) completely reversed load
Description : Fatigue strength of a material increases by (A) Having notches in the specimen (B) Rise in temperature (C) Under stressing the specimen (D) Having scratches on the surface
Last Answer : (C) Under stressing the specimen
Description : _____ is a surface fatigue failure which occurs when the load on the bearing part exceeds the surface endurance strength of the material. (a) Scoring (b) Pitting (c) Corrosion
Last Answer : (b) Pitting
Description : Young's modulus of a material is the measure of its (A) Stiffness (B) Malleability (C) Creep resistance (D) Tensile strength
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
Description : Friedrich Wohler prepared the organic compound
Last Answer : urea.
Description : Tumbling is the process of improving the __________ of the materials/parts. (A) Surface finish (B) Fatigue limit (C) Creep limit (D) Surface cleanliness
Last Answer : Option D
Description : Temper brittleness of a material can be fairly detected by the __________ test. (A) Fatigue (B) Notched bar impact (C) Tensile (D) Hardness
Description : High copper amalgam lasts longer than low copper amalgam because of:** A. Increased compressive strength B. Increased corrosion resistance C. High creep D. Increased tensile strength E. Decreased setting expansion
Last Answer : A. Increased compressive strength
Description : Notched bar test is used for testing the __________ of a material. (A) Impact strength (B) Endurance limit (C) Machinability (D) Corrosion resistance
Last Answer : (A) Impact strength
Description : In a cross joint tensile test the following observations were made: Specimen width 20mm, Material thickness 20mm, Max Load: 180kN, Break position: Parent Plate. What is the UTS? a) 45 kN/mm b) 450 N/mm2c) 39 kN/mm2d) 39 N/mm2
Last Answer : b) 450 N/mm2
Description : In an all weld tensile test, the original specimen gauge length was 50mm, and after the test the increased gauge length was 65mm, what is the elongation percentage? a) % A is 40 b) % A is 60 c) % A is 30 d) % A is 36
Last Answer : c) % A is 30
Description : In a welding procedure transverse joint tensile test the following observations were made. The specimen CSA was recorded as 30mm x 20mm and the maximum load applied was recorded as 200kN. What is the UTS? a) 33kN/mm2b) 333N/mm2c) 3333N/mm2d) 33N/mm2
Last Answer : b) 333N/mm2
Description : The value of Poison’s ratio depends upon (a) Nature of load, tensile or compressive (b) Magnitude of load (c) Material of the test specimen (d) Dimensions of the test specimen
Last Answer : (c) Material of the test specimen
Description : __________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength. (A) Lancing (B) Shot peening (C) Slugging (D) Spinning
Last Answer : (B) Shot peening
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 : Percentage elongation during tensile test is indication of (a) Ductility (b) Malleability (c) Creep (d) Rigidity
Last Answer : (a) Ductility
Description : A material is capable of resisting softening at high temperature, because of its property termed as (A) Hot temper (B) Hot hardness (C) Fatigue (D) Creep
Last Answer : (B) Hot hardness
Description : A member which is subjected to reversible tensile or compressive stress may fail at a stress lower than the ultimate stress of the material. This property of metal, is called (A) Plasticity of the ... ) Elasticity of the metal (C) Fatigue of the metal (D) Workability of the metal
Last Answer : (C) Fatigue of the metal
Description : Fatigue failure of a material results from __________ stress. (A) Tensile (B) Compressive (C) Fluctuating (D) None of these
Last Answer : (C) Fluctuating
Description : Fatigue failure of a material may occur, when it is subjected to __________ stress. (A) Fluctuating (B) Tensile (C) Compressive (D) Torsion
Last Answer : (A) Fluctuating
Description : Normalising does not __________ of a metal. (A) Improve machinability & tensile strength (B) Remove internal stresses (C) Refine the structure (D) Remove strains caused by cold working
Description : What will happen if stresses induced due to surge in the spring exceeds the endurance limit stress of the spring. a) Fatigue Failure b) Fracture c) None of the listed d) Nipping
Last Answer : a) Fatigue Failure
Description : What will happen if stresses induced due to surge in the spring exceeds the endurance limit stress of the spring. (a) Fatigue Failure (b) Fracture (c) None of the listed (d) Nipping
Last Answer : (a) Fatigue Failure
Description : A material being tested for endurance strength is subjected to the __________ load. (A) Impact (B) Completely reversed (C) Dynamic (D) Static & dynamic
Last Answer : B) Completely reversed
Last Answer : (B) Completely reversed
Description : Distinguish between creep and fatigue.
Last Answer : Creep is low and progressive deformation of a material with time under a constant stress at high temperature applications. Fatigue is the reduced tendency of material to offer resistance to applied stress under repeated or fluctuating loading condition.
Description : Deformation that occurs due to stress over a period of time is known as ____________ a) Wear resistance b) Fatigue c) Creep d) Fracture
Last Answer : c) Creep
Description : Distinguish Between Creep And Fatigue?
Last Answer : Creep is low and progressive deformation of a material with time under a constant stress at high-temperature applications. Fatigue is the reduced tendency of material to offer resistance to applied stress under repeated or fluctuating loading condition.
Description : Explain the laboratory procedure to determine the compressive strength of concrete cubes as per IS-516-1959 with reference to following points: i. Preparation of test specimen ii. Procedure of testing iii. Interpretation of results
Last Answer : Preparation of test specimen: i. Take three cubes of 15 cm sides and apply oil to its inner surface. ii. Prepare the concrete mixture of required grade and fill it in each mould in 3 layers. ... say 23N/mm 2) than the specified grade M20, then that concrete is safe and good for construction.
Description : What property of a metal describes the onset of plastic deformation in a tensile test? w) tensile strength x) elongation y) yield strength z) reduction in area
Last Answer : ANSWER: Y -- YIELD STRENGTH
Description : Pick out the wrong statement. (A) The toughness of a material decreases, when it is heated (B) Crane hooks are normally made of wrought iron (C) Cold working of a metal decreases its ... (D) The temperature at which new grains are formed in a metal is known as the recrystallisation temperature
Last Answer : (C) Cold working of a metal decreases its fatigue strength
Description : In cold working of metal as compared to its hot working (A) Cracks and blow holes are eliminated (B) Ductility and impact strength improves (C) Appreciable strain hardening is produced (D) Yield stress, hardness and fatigue strength is not at all affected
Last Answer : (C) Appreciable strain hardening is produced
Description : . __________ test can be termed as the semi-destructive test. (A) Impact (B) Torsion (C) Hardness (D) Charpy
Description : The first organic compound synthesized in 1828 by Frederich Wohler was: w) benzene x) urea y) estrogen z) methane
Last Answer : ANSWER: X -- UREA
Description : Amino resins are used in paper treatment to improve its (A) Wet tear and bursting strength (B) Folding endurance (C) Wet rub resistance (D) All (A), (B) & (C)
Description : Lead alone is not used in storing equipment, because it (A) Is very costly (B) Corrodes easily (C) Is having low creep strength (D) None of these
Last Answer : (C) Is having low creep strength
Description : The behaviour of a metal specimen, which when plastically strained in tension reduces its yield stress in compression and vice versa; is termed as the (A) Work hardening (B) Bauschinger effect (C) Creeping effect (D) Stress recovery effect
Last Answer : (B) Bauschinger effect