Description : The ability of materials to develop a characteristic behavior under repeated loading known as ___________ a) Toughness b) Resilience c) Hardness d) Fatigue
Last Answer : d) Fatigue
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 : 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 : 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 : Ability of a material to __________ is indicated by its damping capacity. (A) Withstand compression (B) Absorb vibration (C) Absorb shock (D) None of these
Last Answer : (B) Absorb vibration
Description : The most important property for the spring material is (a) High elastic limit (b) High deflection value (c) Resistance to fatigue and shock (d) All of these
Last Answer : (d) All of these
Description : Out of the following, the best material capable of withstanding shock & vibration without the danger of cracking is (A) Malleable iron (B) Grey cast iron (C) Chilled cast iron (D) White cast iron
Last Answer : Option A
Description : A transmission shaft subjected to bending loads must be designed on the basis of (a) maximum normal stress theory (b) maximum shear stress theory (c) maximum normal stress and maximum shear stress theories (d) fatigue strength
Last Answer : (a) maximum normal stress theory
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 : The strain energy stored in a spring when subjected to greatest load without being permanently distorted, is called (A) Stiffness (B) Proof resilience (C) Proof stress (D) Proof load
Last Answer : (B) Proof resilience
Description : . A material capable of undergoing large permanent deformation, when subjected to tension is termed as (A) Friable (B) Ductile (C) Brittle (D) None of these
Last Answer : (B) Ductile
Description : The bolt is subjected to __________ when the nut is tightened by putting the washer beneath it. (A) Tension (B) Shear (C) Compression (D) Bending & tension
Description : Electrical machinery insulation will break down more rapidly due to _________________. A. low loading of motors and generators B. frequent megger testing C. high temperatures and vibration D. high operating frequencies
Last Answer : Answer: C
Description : Does ASME Standard take into consideration shock and fatigue factors? a) Yes b) No
Last Answer : a) Yes
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 yield point in static loading is ............... as compared to fatigue loading. (a) higher (b) lower (c) same
Last Answer : (a) higher
Description : The relationship between the alternating stress and mean stress is given by the following equation: σ a =σ e [1-(σ m /σ u )x], where σ e is the fatigue limit for completely reversed loading. The value of x for Gerber line is equal to _________ a) 1 b) 2 c) 0.5 d) -1
Last Answer : b) 2
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 : Motor controllers are seldom troubled by grounds because ________________. A. cabinet heaters always keep internal components dry B. special insulation is used on wire for vital circuits C. ... on controller panels greatly reduce vibration D. contactors and relays are mounted on nonconducting panels
Last Answer : Answer: D
Description : The advantages of electrometric bearings are a) Permits movement of the structure in all directions b) Serves as a shock absorber due to anti-vibration properties of elestomeric c) better dispersion of longitudinal forces to the approaches d) All of the above*
Last Answer : d) All of the above*
Description : Slow and progressive deformation of a material with time under constant stress is called (A) Creep (B) Erosion (C) Resilience (D) None of these
Last Answer : (A) Creep
Description : The ability of a material to absorb energy in the elastic range is a measure of its (A) Toughness (B) Resilience (C) Malleability (D) Brittleness
Last Answer : (B) Resilience
Description : Ability of a material to absorb energy in deformation in the plastic range is characterised as its (A) Ductility (B) Toughness (C) Creep (D) Resilience
Last Answer : (B) Toughness
Description : The ability of a material to offer resistance to scratching or indentation is a measure of its (A) Brittleness (B) Toughness (C) Hardness (D) Resilience
Last Answer : (C) Hardness
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
Description : The property of material, by which a given amount of energy is absorbed by it without plastic deformation, is called the (A) Resilience (B) Toughness (C) Ductility (D) Impact strength
Last Answer : (A) Resilience
Description : The property of material, by which a given amount of energy is absorbed by it, without plastic deformation, is called (A) Resilience (B) Toughness (C) Ductility (D) Impact strength
Description : Fatigue failure of a material results from __________ stress. (A) Tensile (B) Compressive (C) Fluctuating (D) None of these
Last Answer : (C) Fluctuating
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 : 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
Description : Temper brittleness of a material can be fairly detected by the __________ test. (A) Fatigue (B) Notched bar impact (C) Tensile (D) Hardness
Last Answer : Option B
Description : The loss of strength in compression which occurs, when there is a gain of strength in tension due to over loading is called (A) Bauschinger effect (B) Hooke's effect (C) Hysteresis (D) Relaxation
Last Answer : (A) Bauschinger effect
Description : __________ of SBR is adversely affected, if more quantity of styrene is added to butadiene during its co-polymerisation to produce SBR. (A) Percent elongation (B) Resilience (C) Freezing point (D) Strength
Description : There are n rotors mounted on the shaft and when subjected to torsional vibration there will be A. N nodes B. (N-1) nodes C. (N+1) nodesD. Any number of nodes
Last Answer : B. (N-1) nodes
Description : When a thin plate is subjected to loading in its own plane only, the condition is called _ a.plane stress b.plane strain c.zero stress d.zero strain
Last Answer : a.plane stress
Description : In case of an eccentric loading on a bracket subjected to moment M, the tangential force developed in any rivet, at right angles to its radius vector r is (A) Mr/ r² (B) r²/Mr (C) Mr²/ r² (D) Mr/ r²
Last Answer : (A) Mr/ r²
Description : A circular slab subjected to external loading, deflects to form a (A) Semi-hemisphere (B) Ellipsoid (C) Paraboloid (D) None of these
Last Answer : Answer: Option C
Description : A doubly reinforced section is used (a) When the members are subjected to alternate external loads and the bending moment in the sections reverses. (b) When the member are subjected to loading eccentric in ... . (c) When the members are subjected to accidental lateral loads . (d) All of the above
Last Answer : (d) All of the above
Description : The connecting rod bolts are tightened up with the initial tension greater than external load so that (A) Failure of bolt will be static (B) The resultant load on bolt will not be affected by ... ) The bolt will not fail by fatigue although the external load is fluctuating (D) All the three
Last Answer : (D) All the three
Description : The type of aggregates not suitable for high strength concrete and for pavements subjected to tension, is (A) Rounded aggregate (B) Irregular aggregate (C) Angular aggregate (D) Flaky aggregat
Last Answer : Answer: Option A
Description : Which of the following facts are true for resilience? a) Ability of material to absorb energy when deformed elastically b) Ability to retain deformation under the application of load or after removal ... c) Ability of material to absorb energy when deformed plastically d) None of the mentioned
Last Answer : a) Ability of material to absorb energy when deformed elastically
Description : Resilience is defined as the property of material to absorb energy when deformed _________ and to release this energy when unloaded. a) Elastically b) Plastically c) Up to fracture point d) None of the listed
Last Answer : a) Elastically
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 : Pick out the wrong statement. (A) Cold cracking of a weld is due to the presence of hydrogen gas in the weld (B) True stress is given by, σ = σE (1 + εE), where σE and εE ... in the iron blast furnace (D) High residual stress at the surface is beneficial for fatigue properties of a material
Last Answer : Option C
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 : Under complex loading, if elastic limit reaches in tension, then failure occurs due to (a) Firstly Maximum principal strain theory (b) Secondly Maximum principal theory of strain energy (c) Thirdly Maximum Principal stress theory (d) None
Last Answer : (c) Thirdly Maximum Principal stress theory