Factor of safety in machine design is defined as the ratio of ultimate stress to __________ stress. (A) Working (B) Bearing (C) Yield (D) None of these

Factor of safety in machine design is defined as the ratio of ultimate
stress to __________ stress.
(A) Working
(B) Bearing
(C) Yield
(D) None of these
by

1 Answer

Answer :

Option A
by

Related questions

Factor of safety is the ratio of the __________ stress to the working stress. (A) Tensile (B) Compressive (C) Yield (D) Bearing

Description : Factor of safety is the ratio of the __________ stress to the working stress. (A) Tensile (B) Compressive (C) Yield (D) Bearing

Last Answer : Option C

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

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

Non-ferrous metals and hard steels do not exhibit a definite yield point, when pulled in the testing machine and hence for these cases, a better measure of their elastic properties is defined by the __________ stress. (A) Ultimate (B) Yield point (C) Proof (D) None of these

Description : Non-ferrous metals and hard steels do not exhibit a definite yield point, when pulled in the testing machine and hence for these cases, a better measure of their elastic properties is defined by the __________ stress. (A) Ultimate (B) Yield point (C) Proof (D) None of these

Last Answer : (C) Proof

Pick up the correct statement from the following: (A) The bearing capacity of a pile is defined as the load which can be sustained by the pile without producing excessive settlement (B) The safe bearing capacity of a pile is obtained by dividing the ultimate bearing capacity with a suitable factor of safety (C) The factor of safety for piles is taken as 6 (D) All the above

Description : Pick up the correct statement from the following: (A) The bearing capacity of a pile is defined as the load which can be sustained by the pile without producing excessive settlement (B) The safe bearing capacity ... of safety (C) The factor of safety for piles is taken as 6 (D) All the above

Last Answer : Answer: Option D

Examine the following statements: (i) Factor of safety for steel should be based on its yield stress, (ii) Factor of safety for steel should be based on its ultimate stress, (iii) Factor of safety for concrete should be based on its yield stress, (iv) Factor of safety for concrete should be based on its ultimate stress. The correct statements are (A) (i) and (iii) (B) (i) and (iv) (C) (ii) and (iii) (D) (ii) and (iv

Description : Examine the following statements: (i) Factor of safety for steel should be based on its yield stress, (ii) Factor of safety for steel should be based on its ultimate stress, (iii) Factor of safety for concrete should be based on ... (iii) (B) (i) and (iv) (C) (ii) and (iii) (D) (ii) and (iv

Last Answer : Answer: Option B

The most critical consideration in the design of a rolled steel column carrying axial loads is the (a) Percentage elongation at yield and the net cross-sectional area (b) Critical bending strength and axial yield strength of material (c) Buckling strength based on the net area of the section and percentage elongation at ultimate load (d) Compressive strength based on slenderness ratio and gross cross-sectional area.

Description : The most critical consideration in the design of a rolled steel column carrying axial loads is the (a) Percentage elongation at yield and the net cross-sectional area (b) Critical bending ... at ultimate load (d) Compressive strength based on slenderness ratio and gross cross-sectional area.

Last Answer : (d) Compressive strength based on slenderness ratio and gross cross-sectional area.

Factor of safety is a. Tensile stress / Permissible stress b. Compressive stress / Ultimate stress c. Ultimate stress / Permissible stress d. Ultimate stress / Shear stress

Description : Factor of safety is a. Tensile stress / Permissible stress b. Compressive stress / Ultimate stress c. Ultimate stress / Permissible stress d. Ultimate stress / Shear stress

Last Answer : c. Ultimate stress / Permissible stress

Define the term i) Ultimate stress ii) Factor of safety.

Description : Define the term i) Ultimate stress ii) Factor of safety.

Last Answer : i) Ultimate Stress:- It is defined as the ratio of maximum load that the specimen (system) can withstand to original cross-sectional area of specimen.  ii) Factor of Safety:- It is defined as the ratio of ultimate stress to working stress.

In working stress method of design, the factor of safety for concrete and steel respectively are [ A ] 3.0 and 1.8 [ B ] 3.0 and 1.18 [ C ] 3.0 and 1.15 [ D ] 1.5 and 1.5

Description : In working stress method of design, the factor of safety for concrete and steel respectively are [ A ] 3.0 and 1.8 [ B ] 3.0 and 1.18 [ C ] 3.0 and 1.15 [ D ] 1.5 and 1.5

Last Answer : [ A ] 3.0 and 1.8

The connecting rod bolts are tightened up so that the initial tightening stress (A) Approaches yield point (B) Approaches endurance limit (C) Approaches (yield point stress/factor of safety) (D) Approaches (endurance limit stress/factor of safety)

Description : The connecting rod bolts are tightened up so that the initial tightening stress (A) Approaches yield point (B) Approaches endurance limit (C) Approaches (yield point stress/factor of safety) (D) Approaches (endurance limit stress/factor of safety)

Last Answer : (A) Approaches yield point

(A) Percentage elongation (B) Yield strength (C) Ultimate strength (D) Area under stress-strain diagram

Description : (A) Percentage elongation (B) Yield strength (C) Ultimate strength (D) Area under stress-strain diagram

Last Answer : (B) Yield strength

According to the ASME code, maximum allowable shear stress is taken as X% of yield strength or Y% of ultimate strength. a) X=30 Y=18 b) X=30 Y=30 c) X=18 Y=18 d) X=18 Y=30

Description : According to the ASME code, maximum allowable shear stress is taken as X% of yield strength or Y% of ultimate strength. a) X=30 Y=18 b) X=30 Y=30 c) X=18 Y=18 d) X=18 Y=30

Last Answer : a) X=30 Y=18

According to the ASME code, maximum allowable shear stress is taken as X% of yield strength or Y% of ultimate strength. a) X=30 Y=18 b) X=30 Y=30 c) X=18 Y=18 d) X=18 Y=30

Description : According to the ASME code, maximum allowable shear stress is taken as X% of yield strength or Y% of ultimate strength. a) X=30 Y=18 b) X=30 Y=30 c) X=18 Y=18 d) X=18 Y=30

Last Answer : a) X=30 Y=18

Theories of elastic failure while dealing with brittle materials consider the failure criterion as (a) Ultimate stress (b) Yield stress (c) Both ultimate and yield stress (d) None

Description : Theories of elastic failure while dealing with brittle materials consider the failure criterion as (a) Ultimate stress (b) Yield stress (c) Both ultimate and yield stress (d) None

Last Answer : (a) Ultimate stress

Theories of elastic failure while dealing with ductile materials consider the failure criterion as (a) Ultimate stress (b) Yield stress (c) Both ultimate and yield stress (d) None

Description : Theories of elastic failure while dealing with ductile materials consider the failure criterion as (a) Ultimate stress (b) Yield stress (c) Both ultimate and yield stress (d) None

Last Answer : (b) Yield stress

Which of the following stresses is used for identifying the quality of structural steel? (A) Ultimate stress (B) Yield stress (C) Proof stress (D) None of the abov

Description : Which of the following stresses is used for identifying the quality of structural steel? (A) Ultimate stress (B) Yield stress (C) Proof stress (D) None of the above

Last Answer : Answer: Option B

Consider the following salient points in a stress-strain curve of a mild steel bar: 1. Yield point 2. Braking point 3. Yield plateau 4 . Proportionality limit 5. Ultimate point The correct sequence in which they occur while testing the mild steel bar in tension from initial zero strain to failure is (a) 4, 1, 2, 3 and 5 (b) 1, 4, 3, 5 and 2 (c) 4, 1, 3, 5 and 2 (d) 1, 4, 2, 3 and 5

Description : Consider the following salient points in a stress-strain curve of a mild steel bar: 1. Yield point 2. Braking point 3. Yield plateau 4 . Proportionality limit 5. Ultimate point The correct sequence in which they occur while testing the mild ... , 5 and 2 (c) 4, 1, 3, 5 and 2 (d) 1, 4, 2, 3 and 5

Last Answer : (c) 4, 1, 3, 5 and 2

According to ASME code, maximum allowable shear stress is taken as X% of yield strength or Y% of ultimate strength. a) X=30 Y=18 b) X=30 Y=30 c) X=18 Y=18 d) X=18 Y=30

Description : According to ASME code, maximum allowable shear stress is taken as X% of yield strength or Y% of ultimate strength. a) X=30 Y=18 b) X=30 Y=30 c) X=18 Y=18 d) X=18 Y=30

Last Answer : a) X=30 Y=18

When the steel is subjected to normalising, its __________ decreases. (A) Yield point (B) Ductility (C) Ultimate tensile strength (UTS)

Description : When the steel is subjected to normalising, its __________ decreases. (A) Yield point (B) Ductility (C) Ultimate tensile strength (UTS)

Last Answer : (B) Ductility

The property of the bearing material to yield and adopt its shape to that of journal is called (A) Embeddability (B) Conformability (C) Viscosity (D) Endurance limit stress

Description : The property of the bearing material to yield and adopt its shape to that of journal is called (A) Embeddability (B) Conformability (C) Viscosity (D) Endurance limit stress

Last Answer : (B) Conformability

Define the terms. (i)Factor of safety (ii)working stress

Description : Define the terms. (i)Factor of safety (ii)working stress

Last Answer : (i) Factor of Safety: Factor of safety is defined as the ratio of the maximum stress to the working stress or design stress. Mathematically,  In Case of Ductile Material, (ii) ... : It is defined as the ratio of actual axial load and the original cross section of the specimen 

Two footings, one circular and the other square, are founded on the surface of a purely cohesionless soil. The diameter of the circular footing is the same as that of the side of the square footing. The ratio between their ultimate bearing capacities will be : (a) 1.0 (b) 1.3 (c) 1.33 (d) 0.75

Description : Two footings, one circular and the other square, are founded on the surface of a purely cohesionless soil. The diameter of the circular footing is the same as that of the side of the square footing. The ratio between their ultimate bearing capacities will be : (a) 1.0 (b) 1.3 (c) 1.33 (d) 0.75

Last Answer : (d) 0.75

If compressive yield stress and tensile yield stress are equivalent, then region of safety from maximum principal stress theory is of which shape? a) Rectangle b) Square c) Circle d) Ellipse

Description : If compressive yield stress and tensile yield stress are equivalent, then region of safety from maximum principal stress theory is of which shape? a) Rectangle b) Square c) Circle d) Ellipse

Last Answer : b) Square

Factor of safety against sliding of a slope, is the ratio of (A) Actual cohesion to that required to maintain stability of slope (B) Shear strength to shear stress along the surface (C) Neither (a) nor (b) (D) Both (a) and (b)

Description : Factor of safety against sliding of a slope, is the ratio of (A) Actual cohesion to that required to maintain stability of slope (B) Shear strength to shear stress along the surface (C) Neither (a) nor (b) (D) Both (a) and (b)

Last Answer : Answer: Option D

The yield moment of a cross section is defined as the moment that will just produce the yield stress in (A) The outer most fibre of the section (B) The inner most fibre of the section (C) The neutral fibre of the section (D) The fibre everywhere

Description : The yield moment of a cross section is defined as the moment that will just produce the yield  stress in  (A) The outer most fibre of the section  (B) The inner most fibre of the section  (C) The neutral fibre of the section  (D) The fibre everywhere 

Last Answer : (A) The outer most fibre of the section 

Stress strain curve of high tensile steel (A) Has a definite yield point (B) Does not show definite yield point but yield point is defined by 0.1% proof stress (C) Does not show definite yield point but yield point is defined by 0.2% proof stress (D) Does not show definite yield point but yield point is defined by 2% proof stress,

Description : Stress strain curve of high tensile steel (A) Has a definite yield point (B) Does not show definite yield point but yield point is defined by 0.1% proof stress (C) Does not show definite yield ... proof stress (D) Does not show definite yield point but yield point is defined by 2% proof stress,

Last Answer : Answer: Option C

High endurance limit of carburised machine parts is because of the fact that carburisation (A) Suppresses any stress concentration produced in the parts (B) Enhances the yield point of the material (C) Introduces a compressive layer on the surface (D) Produces a better surface finish

Description : High endurance limit of carburised machine parts is because of the fact that carburisation (A) Suppresses any stress concentration produced in the parts (B) Enhances the yield point of the material (C) Introduces a compressive layer on the surface (D) Produces a better surface finish

Last Answer : (C) Introduces a compressive layer on the surface

The stress at which extension of the material takes place more rapidly as compared to the increase in load is termed as the __________ point of the material. (A) Elastic (B) Ultimate (C) Yielding (D) Breaking

Description : The stress at which extension of the material takes place more rapidly as compared to the increase in load is termed as the __________ point of the material. (A) Elastic (B) Ultimate (C) Yielding (D) Breaking

Last Answer : (C) Yielding

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

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

Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter. (A) Bomb (B) Throttling (C) Junker's (D) Boy's

Description : Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter. (A) Bomb (B) Throttling (C) Junker's (D) Boy's

Last Answer : Option B

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

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

The design yield stress of steel according to IS: 4561978 is: (A) 0.37 fy (B) 0.57 fy (C) 0.67 fy (D) 0.87 fy Where fy is the characteristic yield strength of steel

Description : The design yield stress of steel according to IS: 4561978 is: (A) 0.37 fy (B) 0.57 fy (C) 0.67 fy (D) 0.87 fy Where fy is the characteristic yield strength of steel

Last Answer : Answer: Option D

Design yield stress for steel in tension and compression is [ A ] 0.65 fy [ B ] 0.87 fy [ C ] 0.75 fy [ D ] None of the above

Description : Design yield stress for steel in tension and compression is [ A ] 0.65 fy [ B ] 0.87 fy [ C ] 0.75 fy [ D ] None of the above

Last Answer : [ B ] 0.87 fy

In general in the design of a section by limit method, it is assumed that [ A ] the stress in steel to reach its yield limit before concrete failure [ B ] the stress in concrete to reach its permissible limit before to reach yield stress in steel [ C ] stresses in both concrete and steel reach their permissible values simultaneously [ D ] none of the above are correct

Description : In general in the design of a section by limit method, it is assumed that [ A ] the stress in steel to reach its yield limit before concrete failure [ B ] the stress in concrete to ... in both concrete and steel reach their permissible values simultaneously [ D ] none of the above are correct

Last Answer : [ A ] the stress in steel to reach its yield limit before concrete failure

Design yield stress for steel in tension and compression is [ A ] 0.65 fy [ B ] 0.87 fy [ C ] 0.75 fy [ D ] None of the above

Description : Design yield stress for steel in tension and compression is [ A ] 0.65 fy [ B ] 0.87 fy [ C ] 0.75 fy [ D ] None of the above

Last Answer : [ B ] 0.87 fy

In general in the design of a section by limit method, it is assumed that [ A ] the stress in steel to reach its yield limit before concrete failure [ B ] the stress in concrete to reach its permissible limit before to reach yield stress in steel [ C ] stresses in both concrete and steel reach their permissible values simultaneously [ D ] none of the above are correct

Description : In general in the design of a section by limit method, it is assumed that [ A ] the stress in steel to reach its yield limit before concrete failure [ B ] the stress in concrete to ... in both concrete and steel reach their permissible values simultaneously [ D ] none of the above are correct

Last Answer : [ A ] the stress in steel to reach its yield limit before concrete failure

In Limit state design, the maximum working load that the structure has to withstand is called [ A ] Service load [ B ] Factored load [ C ] Characteristic load [ D ] Ultimate load

Description : In Limit state design, the maximum working load that the structure has to withstand is called [ A ] Service load [ B ] Factored load [ C ] Characteristic load [ D ] Ultimate load

Last Answer : [ C ] Characteristic load

In Limit state design, the maximum working load that the structure has to withstand is called [ A ] Service load [ B ] Factored load [ C ] Characteristic load [ D ] Ultimate load

Description : In Limit state design, the maximum working load that the structure has to withstand is called [ A ] Service load [ B ] Factored load [ C ] Characteristic load [ D ] Ultimate load

Last Answer : [ C ] Characteristic load

Indicate the false statement. Noise figure is defined as A. the ratio of the S/N power supplied at the input terminal of a receiver or amplifier to the S/N power supplied to the output or load resistor B. noise factor expressed in decibels C. an unwanted form of energy tending to interfere with the proper and easy reception and reproduction of wanted signal D. S/N of an ideal system divided by S/N at the output of the receiver or amplifier under test, both working at the same temperature over the same bandwidth and fed from the same source

Description : Indicate the false statement. Noise figure is defined as A. the ratio of the S/N power supplied at the input terminal of a receiver or amplifier to the S/N power supplied to the output or ... under test, both working at the same temperature over the same bandwidth and fed from the same source

Last Answer : C. an unwanted form of energy tending to interfere with the proper and easy reception and reproduction of wanted signals

According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to __________ times the yield stress. (A) 0.5 (B) 2 (C) √2 (D) √3/2

Description : According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to __________ times the yield stress. (A) 0.5 (B) 2 (C) √2 (D) √3/2

Last Answer : (A) 0.5

Fouling factor' used in the design of a multipass shell and tube heat exchanger is a (A) Non-dimensional factor (B) Factor of safety

Description : Fouling factor' used in the design of a multipass shell and tube heat exchanger is a (A) Non-dimensional factor (B) Factor of safety

Last Answer : (B) Factor of safety

Fouling factor (A) Is a dimensionless quantity (B) Does not provide a safety factor for design (C) Accounts for additional resistances to heat flow (D) None of these

Description : Fouling factor (A) Is a dimensionless quantity (B) Does not provide a safety factor for design (C) Accounts for additional resistances to heat flow (D) None of these

Last Answer : (C) Accounts for additional resistances to heat flow

In a ductile material, the strength are (a)Firstly Ultimate >yield > elastic limit (b) Secondly Ultimate > yield =elastic limit (c) Thirdly Ultimate=yield=elastic limit (d) None

Description : In a ductile material, the strength are (a)Firstly Ultimate >yield > elastic limit (b) Secondly Ultimate > yield =elastic limit (c) Thirdly Ultimate=yield=elastic limit (d) None

Last Answer : (a)Firstly Ultimate >yield > elastic limit

In a brittle material, the strength are (a) Firstly Ultimate >yield > elastic limit (b) Secondly Ultimate > yield =elastic limit (c) Thirdly Ultimate=yield=elastic limit (d) None

Description : In a brittle material, the strength are (a) Firstly Ultimate >yield > elastic limit (b) Secondly Ultimate > yield =elastic limit (c) Thirdly Ultimate=yield=elastic limit (d) None

Last Answer : (c) Thirdly Ultimate=yield=elastic limit

It is essential that the all possible yield line patterns have to be investigated to find the ------- ----- [ A ] Highest value of the ultimate load [ B ] Lowest value of the ultimate load [ C ] Average value of all the loads. [ D ] None of the above.

Description : It is essential that the all possible yield line patterns have to be investigated to find the ------------ [ A ] Highest value of the ultimate load [ B ] Lowest value of the ultimate load [ C ] Average value of all the loads. [ D ] None of the above.

Last Answer : [ B ] Lowest value of the ultimate load

The yield line ultimate moment is obtained when the yield line is --------------- to the direction of the reinforcement [ A ] Parallel [ B ] At right angles. [ C ] Passes through [ D ] Crosses at an angle of 45°

Description : The yield line ultimate moment is obtained when the yield line is --------------- to the direction of the reinforcement [ A ] Parallel [ B ] At right angles. [ C ] Passes through [ D ] Crosses at an angle of 45°

Last Answer : [ B ] At right angles.

A + (m - 1)ASC] known as equivalent concrete area of R.C.C. is given by (A) Modular ratio method (B) Load factor method (C) Ultimate load method (D) None of these

Description : A + (m - 1)ASC] known as equivalent concrete area of R.C.C. is given by (A) Modular ratio method (B) Load factor method (C) Ultimate load method (D) None of these

Last Answer : Answer: Option A

The maximum net pressure intensity causing shear failure of soil, is known (A) Safe bearing capacity (B) Net safe bearing capacity (C) Net ultimate bearing capacity (D) Ultimate bearing capacity

Description : The maximum net pressure intensity causing shear failure of soil, is known (A) Safe bearing capacity (B) Net safe bearing capacity (C) Net ultimate bearing capacity (D) Ultimate bearing capacity

Last Answer : (C) Net ultimate bearing capacity

Allowable bearing pressure for a foundation depends upon (A) Allowable settlement only (B) Ultimate bearing capacity of soil only (C) Both allowable settlement and ultimate bearing capacity (D) None of above

Description : Allowable bearing pressure for a foundation depends upon (A) Allowable settlement only (B) Ultimate bearing capacity of soil only (C) Both allowable settlement and ultimate bearing capacity (D) None of above

Last Answer : (C) Both allowable settlement and ultimate bearing capacity

Rise of water table in cohesion-less soils upto ground surface reduces the net ultimate bearing capacity approximately by (A) 25 % (B) 50 % (C) 75 % (D) 90 %

Description : Rise of water table in cohesion-less soils upto ground surface reduces the net ultimate bearing capacity approximately by (A) 25 % (B) 50 % (C) 75 % (D) 90 %

Last Answer : (B) 50 %