Description : Why Fatigue Strength Decreases As Size Of A Part Increases Beyond Around 10mm?
Last Answer : The perfection of material conditions is possible at lower sizes, and as size increases, it is not possible to attain a uniform structure of the material.
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 : While normal carburising and nitriding surface treatments increase fatigue strength, excessive treatment may decrease the fatigue strength. Why ?
Last Answer : .Normal carburising/nitriding treatments increase volume due to phase transformation at Surface and introduce residual compressive surface stress and thus increase the fatigue strength. By excessive treatment the ... develop in the regions of high tensile stress and lead to early fatigue failure.
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 : 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
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
Last Answer : (D) All (A), (B) & (C)
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 : The minimum range for sliding the focusing lens in the internal focusing telescope for focusing at all distances beyond 4 m is (A) 5 mm (B) 10 mm (C) 15 mm (D) 20 mm
Last Answer : (D) 20 mm
Description : Choose the most suitable antihypertensive drug for a 45-year-old male company executive who has a travelling job. His blood pressure is 160/100 mm Hg, and he is a diabetic ... → rebound hypertension. Hydrochlorothiazide: May worsen diabetes; more likely to produce weakness, fatigue and impotenc
Last Answer : B. Enalapril
Description : Dielectric strength of rubber is around (a) 5 kV/mm (b) 15 kV/mm (c) 30 kV/mm (d) 200 kV/mm
Last Answer : (c) 30 kV/mm
Description : Nitriding of a steel part does not increase its (A) Grain size (B) Fatigue limit (C) Surface hardness (D) Wear resistance
Last Answer : Option B
Description : Vulcanisation of rubber (A) Decreases its tensile strength (B) Increases its ozone & oxygen reactivity (C) Increases its oil & solvent resistance (D) Converts its plasticity into elasticity
Last Answer : (D) Converts its plasticity into elasticity
Description : Work hardening of a material (A) Decreases its tensile strength (B) Decreases its ductility (C) Increases its ductility (D) Does not affect its ductility
Last Answer : (B) Decreases its ductility
Description : As distance increases, value of gravitational field strength A. also increases B. decreases C. remains constant D. may increase or decrease
Last Answer : decreases
Description : In a deposit of normally consolidated clay (A) Effective stress increases with depth but water content of soil and undrained strength decrease with depth (B) Effective stress and water ... decreases with depth (D) Effective stress, water content and undrained strength decrease with depth
Last Answer : C) Effective stress and undrained strength increase with depth but water content decreases with depth
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 : In soils having same values of plasticity index, if liquid limit is increased, then (A) Compressibility and permeability decrease and dry strength increases (B) Compressibility, ... permeability and dry strength increase (D) Compressibility and permeability increase and dry strength decreases
Last Answer : Answer: Option D
Description : Strength of concrete with passage of time (A) Increases (B) Decreases (C) Fluctuates (D) Remains constant
Last Answer : A
Description : Addition of pozzolana to cement (A) Decreases workability (B) Increases strength (C) Increases heat of hydration (D) None of these
Description : High temperature (A) Increases the strength of concrete (B) Decreases the strength of concrete (C) Has no effect on the strength of concrete (D) None of these
Last Answer : Answer: Option B
Description : Ultimate strength of cold drawn high steel wires (A) Increases with increase in diameter of bar (B) Decreases with increase in diameter of bar (C) Does not depend on diameter of bar (D) None of the above
Description : Pick up the incorrect statement from the following: (A) With passage of time, the strength of cement increases (B) With passage of time, the strength of cement decreases (C) After a ... of cement reduces to 50% (D) The concrete made with storage deteriorated cement, gains strength with time
Last Answer : Answer: Option A
Description : With storage, strength of cement (A) Increases (B) Decreases (C) Remains the same (D) None to these
Description : After storage, the strength of cement (A) Decreases (B) Increases (C) Remains same (D) May increase or decrease
Description : Critical shear stress of cohesive sediment (a) Decreases with the void ratio for a given plasticity index (b) Increases with the plasticity index for a given void ratio (c) Increases with shear strength for a given clay content (d) All of the above.
Last Answer : (c) Increases with shear strength for a given clay content
Description : The use of air-entraining agents in concretes (a) Increases workability of concrete (b) Decreases bleeding (c) Decreases strength (d) All of these
Last Answer : (d) All of these
Description : Select incorrect statement from the following [ A ] With passage of time, the strength of cement decreases [ B ] With passage of time, the strength of cement increases [ C ] After a period ... cement reduces to 50% [ D ] The concrete made with storage deteriorated cement; gains strength with time.
Last Answer : [ B ] With passage of time, the strength of cement increases
Description : The entrained air in concrete [ A ] Increases the strength [ B ] Decreases the resistance to weathering [ C ] Increases the workability [ D ] Decreases the workability
Last Answer : [ C ] Increases the workability
Description : Select the incorrect statement [ A ] R.C.C has better fire resistance than steel [ B ] R.C.C. structure is economical than steel structure [ C ] Strength of concrete decreases as age increases [ D ] R.C.C can be used for under water and marine structures
Last Answer : [ C ] Strength of concrete decreases as age increases
Description : fter storage, strength of cement a) Decreases* b) Increases c) Remains same d) Depends upon the type of cement
Last Answer : a) Decreases*
Description : The degree of the B-spline with varying knot vectors a.Increases with knot vectors b.Decreases with knot vectors c.Remains constant d.none of the above
Last Answer : a.Increases with knot vectors
Description : Shortening of top link of tractor three-point hitch system a) Increases weight transfer on rear wheels b) Decreases weight transfer on rear wheels c) Increases penetration of implement d) Decreases penetration of implement Ans. d
Last Answer : Ans. d
Description : An ideal gas is compressed in a cylinder so well insulated that there is essentially no heat transfer. The temperature of gas a. Remains constant b. increases c. decreases d. is basically zero
Last Answer : increases
Description : When liquid water is converted to steam at 100˚C, the entropy of water a. increases b. decreases c. remains the same d. none of the above
Description : As we heat a gas at constant pressure, its volume a. increases b. decreases c. stays the same d. none of the above
Description : When a solid melts, a. the temperature of the substance increases. b. the temperature of the substance decreases. c. heat leaves the substance. d. heat enters the substance.
Last Answer : heat enters the substance.
Description : On a day when the partial pressure of water vapor remains constant, what happens as the temperature rises? a. the relative humidity increases b. the relative humidity decreases c. the relative humidity remains constant d. the air would eventually become saturated
Last Answer : the relative humidity decreases
Description : The volume of a given amount of water _________ as the temperature decreases from 4˚C to 0˚C. a. decreases b. increases c. remains constant d. none of the above
Description : The entropy __________ in an irreversible cyclic process. A. remains constant B. decreases C. increases
Last Answer : Answer: C
Description : The efficiency of Diesei cycle with decrease in cut off (a) increases (b) decreases (c) remains unaffected (d) first increases and then decreases (e) first decreases and then increases.
Last Answer : Answer : a
Description : In an isothermal process, the internal energy (a) increases (b) decreases (c) remains constant (d) first increases and then decreases (e) first decreases and then increases.
Last Answer : Answer : c
Description : In a free expansion process (a) work done is zero (b) heat transfer is zero (c) both (a) and (b) above (d) work done is zero but heat increases (e) work done is zero but heat decreases.
Description : In an isothermal process, the internal energy of gas molecules (a) increases (b) decreases (c) remains constant (d) may increase/decrease depending on the properties of gas (e) shows unpredictable behaviour.
Description : As compression ratio increases, thermal n increases. How is thermal n affected by weak and rich mixture strength ?
Last Answer : Thermal n is high for weak mixture and it decreases as mixture strength becomes rich.
Description : For testing compressive strength of cement, the size of cube used is (A) 50 mm (B) 70.6 mm (C) 100 mm (D) 150 mm
Last Answer : B
Description : For two plates of equal thickness, full strength of square-edged fillet weld can be ensured if its maximum size is limited to (a) 1.5 mm less than the plate thickness (b) 67% of the plate thickness (c) 80% of the plate thickness (d) Thickness of the plate
Last Answer : (a) 1.5 mm less than the plate thickness
Description : Generally the strength of concrete is represented by the crushing stress of concrete cube of size [ A ] 50 mm [ B ] 100 mm [ C ] 150 mm [ D ] 250 mm
Last Answer : [ C ] 150 mm
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