If all the dimensions of a bar are increased in the proportion n : 1, the proportion with which the maximum stress produced in the prismatic bar by its own weight, will increase in the ratio (A) 1 : n (B) n : 1 (C) 1 : (1/n) (D) 1 : n

If all the dimensions of a bar are increased in the proportion n : 1, the proportion with which the
maximum stress produced in the prismatic bar by its own weight, will increase in the ratio
(A) 1 : n
(B) n : 1
(C) 1 : (1/n)
(D) 1 : n
by

1 Answer

Answer :

(B) n : 1
by

Related questions

If the stress produced by a prismatic bar is equal to the working stress, the area of the cross￾section of the prismatic bar, becomes (A) Zero (B) Infinite (C) Maximum (D) Minimum

Description : If the stress produced by a prismatic bar is equal to the working stress, the area of the cross￾section of the prismatic bar, becomes  (A) Zero  (B) Infinite  (C) Maximum  (D) Minimum

Last Answer : (B) Infinite 

The ratio of elongations of a conical bar due to its own weight and that of a prismatic bar of the same length, is (A) 1/2 (B) 1/3 (C) 1/4 (D) 1/5

Description : The ratio of elongations of a conical bar due to its own weight and that of a prismatic bar of the  same length, is  (A) 1/2  (B) 1/3  (C) 1/4  (D) 1/5

Last Answer : (B) 1/3 

A steel bar 20 mm in diameter simply-supported at its ends over a total span of 40 cm carries a load at its centre. If the maximum stress induced in the bar is limited to N/mm2, the bending strain energy stored in the bar, is (A) 411 N mm (B) 511 N mm (C) 611 N mm (D) 711 N mm

Description : A steel bar 20 mm in diameter simply-supported at its ends over a total span of 40 cm carries a  load at its centre. If the maximum stress induced in the bar is limited to N/mm2, the bending  strain energy stored in the ... (A) 411 N mm  (B) 511 N mm  (C) 611 N mm  (D) 711 N mm 

Last Answer : (C) 611 N mm 

A hollow prismatic beam of circular section is subjected to a torsional moment. The maximum shear stress occurs at (a) inner wall of cross section (b) middle of thickness (c) outer surface of shaft (d) none of these

Description : A hollow prismatic beam of circular section is subjected to a torsional moment. The maximum shear stress occurs at (a) inner wall of cross section (b) middle of thickness (c) outer surface of shaft (d) none of these

Last Answer : (c) outer surface of shaft

The statement, regarding the size of stones used at the wearing surface. "The size of a stone used on a road must be in due proportion to the space occupied by a wheel of ordinary dimensions on a smooth level surface. The point of contact will be found to be longitudinal about 2.5 cm and everypiece of stone put into the road which exceeds 2.5 cm in any of its dimension is mischievous" was made by (A) Telford (B) Macadam (C) Tresguet (D) Sully

Description : The statement, regarding the size of stones used at the wearing surface. "The size of a stone used on a road must be in due proportion to the space occupied by a wheel of ordinary dimensions on a smooth ... dimension is mischievous" was made by (A) Telford (B) Macadam (C) Tresguet (D) Sully

Last Answer : Answer: Option B

What happens to the bus bar dimensions of the waveguide when the frequency is increased?

Description : What happens to the bus bar dimensions of the waveguide when the frequency is increased?

Last Answer : The bus bar becomes wider.

If the strain energy stored per unit volume in a hollow shaft subjected to a pure torque when t attains maximum shear stress fs the ratio of inner diameter to outer diameter, is 17/64 (fs/N) (A) 1/2 (B) 1/3 (C) 1/4 (D) 1/5

Description : If the strain energy stored per unit volume in a hollow shaft subjected to a pure torque  when t attains maximum shear stress fs  the ratio of inner diameter to outer diameter, is 17/64  (fs/N)  (A) 1/2  (B) 1/3  (C) 1/4  (D) 1/5

Last Answer : (C) 1/4 

In a bar of large length when held vertically and subjected to a load at its lower end, its own￾weight produces additional stress. The maximum stress will be (A) At the lower cross-section (B) At the built-in upper cross-section (C) At the central cross-section (D) At every point of the bar

Description : In a bar of large length when held vertically and subjected to a load at its lower end, its own￾weight produces additional stress. The maximum stress will be (A) At the lower cross-section (B) At the built-in upper cross-section (C) At the central cross-section (D) At every point of the bar

Last Answer : (B) At the built-in upper cross-section

If Sb, is the average bond stress on a bar of diameter subjected to maximum stress , the length of the embedment is given by (A) l = dt/Sb (B) l = dt/2Sb (C) l = dt/3Sb (D) l = dt/4S

Description : If Sb, is the average bond stress on a bar of diameter subjected to maximum stress , the length of the embedment is given by (A) l = dt/Sb (B) l = dt/2Sb (C) l = dt/3Sb (D) l = dt/4S

Last Answer : Answer: Option D Answer: Option D

As the elastic limit reaches, tensile strain (A) Increases more rapidly (B) Decreases more rapidly (C) Increases in proportion to the stress (D) Decreases in proportion to the stress

Description : As the elastic limit reaches, tensile strain (A) Increases more rapidly (B) Decreases more rapidly (C) Increases in proportion to the stress (D) Decreases in proportion to the stress

Last Answer : (A) Increases more rapidly

The ratio of the stresses produced by a suddenly applied load and by a gradually applied load on a bar, is (A) 1/4 (B) 1/2 (C) 1 (D) 2

Description : The ratio of the stresses produced by a suddenly applied load and by a gradually applied load on a  bar, is  (A) 1/4  (B) 1/2  (C) 1  (D) 2 

Last Answer : (D) 2 

Pick up the correct statement from the following: (A) Steel produced by open hearth process is milder than that obtained by the Bessemer process (B) Engineers prefer open hearth steel for structural purpose as it is more homogenous (C) Basic Bessemer process is suitable for converting poor ore containing a large proportion of sulphur and phosphorus into steel

Description : Pick up the correct statement from the following: (A) Steel produced by open hearth process is milder than that obtained by the Bessemer process (B) Engineers prefer open hearth steel ... is suitable for converting poor ore containing a large proportion of sulphur and phosphorus into steel

Last Answer : Answer: Option D

A pre-stressed concrete member is preferred because (A) Its dimensions are not decided from the diagonal tensile stress (B) Large size of long beams carrying large shear force need not be adopted (C) Removal of cracks in the members due to shrinkage (D) All the above

Description : A pre-stressed concrete member is preferred because (A) Its dimensions are not decided from the diagonal tensile stress (B) Large size of long beams carrying large shear force need not be adopted (C) Removal of cracks in the members due to shrinkage (D) All the above

Last Answer : Answer: Option D

If the water table rises upto ground surface, then the (A) Effective stress is reduced due to decrease in total stress only but pore water pressure does not change (B) Effective stress is reduced due to increase in pore water pressure only but total stress does not change (C) Total stress is reduced due to increase in pore water pressure only but effective stress does not change (D) Total stress is increased due to decrease in pore water pressure but effective stress does not change

Description : If the water table rises upto ground surface, then the (A) Effective stress is reduced due to decrease in total stress only but pore water pressure does not change (B) Effective stress is ... D) Total stress is increased due to decrease in pore water pressure but effective stress does not change

Last Answer : (B) Effective stress is reduced due to increase in pore water pressure only but total stress does not change

If the load on beam is increased, the tensile stress sin the concrete below the neutral axis will (a) Increase (b) Decrease (c) Remain unchanged (d) None of these

Description : If the load on beam is increased, the tensile stress sin the concrete below the neutral axis will (a) Increase (b) Decrease (c) Remain unchanged (d) None of these

Last Answer : (a) Increase

Prismatic compass is considered more accurate than a surveyor's compass, because (A) It is provided with a better magnetic needle (B) It is provided with a sliding glass in the object vane (C) Its graduations are in whole circle bearings (D) It is provided with a prism to facilitate reading of its graduated circle

Description : Prismatic compass is considered more accurate than a surveyor's compass, because (A) It is provided with a better magnetic needle (B) It is provided with a sliding glass in the object vane ( ... whole circle bearings (D) It is provided with a prism to facilitate reading of its graduated circle

Last Answer : (D) It is provided with a prism to facilitate reading of its graduated circle

A steel bar 5 m × 50 mm is loaded with 250,000 N. If the modulus of elasticity of the material is 0.2 MN/mm2 and Poisson's ratio is 0.25, the change in the volume of the bar is: (A) 1.125 cm3 (B) 2.125 cm3 (C) 3.125 cm3 (D) 4.125 cm

Description : A steel bar 5 m × 50 mm is loaded with 250,000 N. If the modulus of elasticity of the material is 0.2  MN/mm2  and Poisson's ratio is 0.25, the change in the volume of the bar is:  (A) 1.125 cm3 (B) 2.125 cm3 (C) 3.125 cm3 (D) 4.125 cm

Last Answer : (C) 3.125 cm

Dimensions of a beam need be changed if the shear stress is more than (A) 10 kg/cm2 (B) 15 kg/cm2 (C) 20 kg/cm2 (D) 25 kg/cm

Description : Dimensions of a beam need be changed if the shear stress is more than (A) 10 kg/cm2 (B) 15 kg/cm2 (C) 20 kg/cm2 (D) 25 kg/cm

Last Answer : Answer: Option C

How can you rid non-response bias from a 95 confidence interval for the population proportion a) use t b) make CI 99 c) make CI 80 d) Increase n by 250 and use an SRS for those remaining e) none?

Description : How can you rid non-response bias from a 95 confidence interval for the population proportion a) use t b) make CI 99 c) make CI 80 d) Increase n by 250 and use an SRS for those remaining e) none?

Last Answer : The answer is e) none. You cannot rid non-response bias.

How can you rid non-response bias from a 95 confidence interval for the population proportion a) use t b) make CI 99 c) make CI 80 d) Increase n by 250 and use an SRS for those remaining e) none?

Description : How can you rid non-response bias from a 95 confidence interval for the population proportion a) use t b) make CI 99 c) make CI 80 d) Increase n by 250 and use an SRS for those remaining e) none?

Last Answer : The answer is e) none. You cannot rid non-response bias.

In the case of parallelization, Amdahl's law states that if P is the proportion of a program that can be made parallel and (1-P) is the proportion that cannot be parallelized, then the maximum speed-up that can be achieved by using N processors is: (A) 1/((1-P)+N.P) (B) 1/((N-1)P+P) (C) 1/((1-P)+P/N) (D) 1/(P+(1-P)/N)

Description : In the case of parallelization, Amdahl's law states that if P is the proportion of a program that can be made parallel and (1-P) is the proportion that cannot be parallelized, then the maximum speed-up that can be achieved by using N processors is ... ((N-1)P+P) (C) 1/((1-P)+P/N) (D) 1/(P+(1-P)/N)

Last Answer : (C) 1/((1-P)+P/N)

The zero of the graduated circle of a prismatic compass is located at (A) North end (B) East end (C) South end (D) West end

Description : The zero of the graduated circle of a prismatic compass is located at  (A) North end  (B) East end  (C) South end  (D) West end 

Last Answer : (C) South end

An angle of 45° with a chain line may be set out with (A) Optical square (B) Open cross staff (C) French cross staff (D) Prismatic square

Description : An angle of 45° with a chain line may be set out with  (A) Optical square  (B) Open cross staff  (C) French cross staff  (D) Prismatic square

Last Answer : (C) French cross staff

In chain surveying, perpendiculars to the chain line are set out by (A) A theodolite (B) A prismatic compass (C) A level (D) An optical square

Description : In chain surveying, perpendiculars to the chain line are set out by (A) A theodolite (B) A prismatic compass (C) A level (D) An optical square

Last Answer : (D) An optical square

In a perfect prismatic compass (A) Magnetic axis and geometric axis of the needle coincide (B) Ends of the needle and pivot are in same vertical and horizontal planes (C) Pivot is vertically over the centre of the graduated circle (D) All the above

Description : In a perfect prismatic compass (A) Magnetic axis and geometric axis of the needle coincide (B) Ends of the needle and pivot are in same vertical and horizontal planes (C) Pivot is vertically over the centre of the graduated circle (D) All the above

Last Answer : (D) All the above

The carryover factor in a prismatic member whose far end is fixed is (A) 0 (B) 1/2 (C) 3/4 (D) 1

Description : The carryover factor in a prismatic member whose far end is fixed is (A) 0 (B) 1/2 (C) 3/4 (D) 1

Last Answer : (B) 1/2

The three moments equation is applicable only when (A) The beam is prismatic (B) There is no settlement of supports (C) There is no discontinuity such as hinges within the span (D) The spans are equal

Description : The three moments equation is applicable only when (A) The beam is prismatic (B) There is no settlement of supports (C) There is no discontinuity such as hinges within the span (D) The spans are equal

Last Answer : (C) There is no discontinuity such as hinges within the span

The stiffness factor for a prismatic beam of length L and moment of inertia I, is (A) IE/L (B) 2EI/L (C) 3EI/L (D) 4EI/L

Description : The stiffness factor for a prismatic beam of length L and moment of inertia I, is  (A) IE/L (B) 2EI/L (C) 3EI/L (D) 4EI/L

Last Answer : (A) IE/L

Which one of the following statements is not correct ? (a) A surveyor’s compass has two sight vanes (b) A prismatic compass has an object vane and an eye vane (c) A trough compass is an accessory to a plane table (d) In a prismatic compass the graduations on the aluminimum disc rotate and the index remains stationary

Description : Which one of the following statements is not correct ? (a) A surveyor's compass has two sight vanes (b) A prismatic compass has an object vane and an eye vane (c) A trough compass ... table (d) In a prismatic compass the graduations on the aluminimum disc rotate and the index remains stationary

Last Answer : (a) A surveyor’s compass has two sight vanes

A simply supported uniform rectangular bar breadth b, depth d and length L carries an isolated load W at its mid-span. The same bar experiences an extension e under same tensile load. The ratio of the maximum deflection to the elongation, is (A) L/d (B) L/2d (C) (L/2d)² (D) (L/3d)²

Description : A simply supported uniform rectangular bar breadth b, depth d and length L carries an isolated  load W at its mid-span. The same bar experiences an extension e under same tensile load. The  ratio of the maximum deflection to the ... (A) L/d (B) L/2d (C) (L/2d)² (D) (L/3d)²

Last Answer : (C) (L/2d)

While designing an air entrained concrete (A) Water cement ratio is reduced (B) Proportion of aggregates is reduced (C) An allowance for the entrained air is made (D) All the above

Description : While designing an air entrained concrete (A) Water cement ratio is reduced (B) Proportion of aggregates is reduced (C) An allowance for the entrained air is made (D) All the above

Last Answer : (D) All the above

A bus run at 100 km/hr top speed. It can carry a maximum of 6 persons. If speed of bus decreases in fixed proportion with increase in number of person, find speed when three person are traveling in bus.

Description : A bus run at 100 km/hr top speed. It can carry a maximum of 6 persons. If speed of bus decreases in fixed proportion with increase in number of person, find speed when three person are traveling in bus.

Last Answer : 100 Km/hr because that is the top speed of the bus.

The maximum stress intensity due to a suddenly applied load is x-times the stress intensity produced by the load of the same magnitude applied gradually. The value of x is (A) 1 (B) 2 (C) 3 (D) 1/2

Description : The maximum stress intensity due to a suddenly applied load is x-times the stress intensity produced by the load of the same magnitude applied gradually. The value of x is (A) 1 (B) 2 (C) 3 (D) 1/2

Last Answer : (B) 2

The risk of segregation is more for (A) Wetter mix (B) Larger proportion of maximum size aggregate (C) Coarser grading (D) All the above

Description : The risk of segregation is more for (A) Wetter mix (B) Larger proportion of maximum size aggregate (C) Coarser grading (D) All the above

Last Answer : Answer: Option D

A simply supported rolled steel joist 8 m long carries a uniformly distributed load over it span so that the maximum bending stress is 75 N/mm². If the slope at the ends is 0.005 radian and the value of E = 0.2 × 106 N/mm2 , the depth of the joist, is (A) 200 mm (B) 250 mm (C) 300 mm (D) 400 mm

Description : A simply supported rolled steel joist 8 m long carries a uniformly distributed load over it span so  that the maximum bending stress is 75 N/mm². If the slope at the ends is 0.005 radian and the  value of E = 0.2 ... joist, is  (A) 200 mm  (B) 250 mm  (C) 300 mm  (D) 400 mm 

Last Answer : (D) 400 mm 

If a solid shaft (diameter 20 cm, length 400 cm, N = 0.8 × 105 N/mm2 ) when subjected to a twisting moment, produces maximum shear stress of 50 N/mm2 , the angle of twist in radians, is (A) 0.001 (B) 0.002 (C) 0.0025 (D) 0.003

Description : If a solid shaft (diameter 20 cm, length 400 cm, N = 0.8 × 105  N/mm2 ) when subjected to a twisting  moment, produces maximum shear stress of 50 N/mm2 , the angle of twist in radians, is  (A) 0.001  (B) 0.002  (C) 0.0025  (D) 0.003 

Last Answer : (C) 0.0025 

For a reinforced concrete beam section, the shape of shear stress diagram is (a) Parabolic over the whole section with maximum value at the neutral axis. (b) Parabolic above the neutral axis and rectangular below the neutral axis. (c) Linearly varying as the distance form the N.A. (d) All the above.

Description : For a reinforced concrete beam section, the shape of shear stress diagram is (a) Parabolic over the whole section with maximum value at the neutral axis. (b) Parabolic above the neutral axis and rectangular below the neutral axis. (c) Linearly varying as the distance form the N.A. (d) All the above.

Last Answer : (b) Parabolic above the neutral axis and rectangular below the neutral axis.

Maximum allowable shear stress for M25 grade concrete is [ A ] 2.5 N/mm2 [ B ] 2.8 N/mm2 [ C ] 3.1 N/mm2 [ D ] 3.5 N/mm2

Description : Maximum allowable shear stress for M25 grade concrete is [ A ] 2.5 N/mm2 [ B ] 2.8 N/mm2 [ C ] 3.1 N/mm2 [ D ] 3.5 N/mm2

Last Answer : [ C ] 3.1 N/mm2

As per IS:456, maximum shear stress for M20 glade concrete in working stress method is [ A ] 1.6 N/mm2 [ B ] 1.8 N/mm2 [ C ] 2.0 N/mm2 [ D ] 2.2 N/mm2

Description : As per IS:456, maximum shear stress for M20 glade concrete in working stress method is [ A ] 1.6 N/mm2 [ B ] 1.8 N/mm2 [ C ] 2.0 N/mm2 [ D ] 2.2 N/mm2

Last Answer : [ B ] 1.8 N/mm2

The ratio of the length and diameter of a simply supported uniform circular beam which experiences maximum bending stress equal to tensile stress due to same load at its mid span, is (A) 1/8 (B) 1/4 (C) 1/2 (D) 1/3

Description : The ratio of the length and diameter of a simply supported uniform circular beam which  experiences maximum bending stress equal to tensile stress due to same load at its mid span, is  (A) 1/8  (B) 1/4  (C) 1/2  (D) 1/3 

Last Answer : (C) 1/2 

The ratio of the length and depth of a simply supported rectangular beam which experiences maximum bending stress equal to tensile stress, due to same load at its mid span, is (A) 1/2 (B) 2/3 (C) 1/4 (D) 1/3

Description : The ratio of the length and depth of a simply supported rectangular beam which experiences  maximum bending stress equal to tensile stress, due to same load at its mid span, is  (A) 1/2  (B) 2/3  (C) 1/4  (D) 1/3

Last Answer : (B) 2/3 

Modulus of elasticity of concrete is increased with (a) Higher W/C ratio (b) Shorter curing period (c) Lesser vibration (d) Increase in age

Description : Modulus of elasticity of concrete is increased with (a) Higher W/C ratio (b) Shorter curing period (c) Lesser vibration (d) Increase in age

Last Answer : (d) Increase in age

When a bar is subjected to increase in temperature and its deformation is prevented, the stress induced in the bar is (a) Tensile (b) Compressive (c) Shear (d) None of the above

Description : When a bar is subjected to increase in temperature and its deformation is prevented, the stress induced in the bar is (a) Tensile (b) Compressive (c) Shear (d) None of the above

Last Answer : (b) Compressive

Bulk modulus of a fluid is the ratio of (A) Shear stress to shear strain (B) Increase in volume to the viscosity of fluid (C) Increase in pressure to the volumetric strain (D) Critical velocity to the viscosity of fluid

Description : Bulk modulus of a fluid is the ratio of (A) Shear stress to shear strain (B) Increase in volume to the viscosity of fluid (C) Increase in pressure to the volumetric strain (D) Critical velocity to the viscosity of fluid

Last Answer : Answer: Option C

The allowable shear stress in the web of mild steel beams decreases with (a) Decrease in h/t ratio (b) Increase in h/t ratio (c ) Decrease in thickness (d) Increase in height Where h is the height and t is the thickness

Description : The allowable shear stress in the web of mild steel beams decreases with (a) Decrease in h/t ratio (b) Increase in h/t ratio (c ) Decrease in thickness (d) Increase in height Where h is the height and t is the thickness

Last Answer : (b) Increase in h/t ratio

A shaft is subjected to bending moment M and a torque T simultaneously. The ratio of the maximum bending stress to maximum shear stress developed in the shaft, is (A) M/T (B) T/M (C) 2M/T (D) 2T/M

Description : A shaft is subjected to bending moment M and a torque T simultaneously. The ratio of the  maximum bending stress to maximum shear stress developed in the shaft, is  (A) M/T (B) T/M (C) 2M/T (D) 2T/M

Last Answer : (C) 2M/T

The ratio of maximum shear stress to average shear stress of a circular beam, is (A) 2/3 (B) 3/2 (C) 3/4 (D) 4/3

Description : The ratio of maximum shear stress to average shear stress of a circular beam, is  (A) 2/3  (B) 3/2  (C) 3/4  (D) 4/3 

Last Answer : (D) 4/3 

If a shaft is simultaneously subjected to a toque T and a bending moment M, the ratio of maximum bending stress and maximum shearing stress is (A) M/T (B) T/M (C) 2M/T (D) 2T/M

Description : If a shaft is simultaneously subjected to a toque T and a bending moment M, the ratio of maximum bending stress and maximum shearing stress is (A) M/T (B) T/M (C) 2M/T (D) 2T/M

Last Answer : (C) 2M/T

The cross sections of the beams of equal length are a circle and a square whose permissible bending stress is same under same maximum bending. The ratio of their flexural weights is, (A) 1.118 (B) 1.338 (C) 1.228 (D) 1.108

Description : The cross sections of the beams of equal length are a circle and a square whose permissible bending stress is same under same maximum bending. The ratio of their flexural weights is, (A) 1.118 (B) 1.338 (C) 1.228 (D) 1.108

Last Answer : (A) 1.118

The maximum value of effective stress in the past divided by the present value is defined as over consolidation ratio (OCR). The O.C.R. of an over consolidated clay is (A) Less than 1 (B) 1 (C) More than 1 (D) None of these

Description : The maximum value of effective stress in the past divided by the present value is defined as over consolidation ratio (OCR). The O.C.R. of an over consolidated clay is (A) Less than 1 (B) 1 (C) More than 1 (D) None of these

Last Answer : (C) More than 1