Which of the following assumptions are made in torsion theory? a. Shaft is perfectly straight b. Material of the shaft is heterogeneous c. Twist cannot be uniform along the length of the shaft d. Shaft is perfectly curve

Which of the following assumptions are made in torsion theory?
a. Shaft is perfectly straight
b. Material of the shaft is heterogeneous
c. Twist cannot be uniform along the length of the shaft
d. Shaft is perfectly curve
v
by

1 Answer

Answer :

a. Shaft is perfectly straight
b. Material of the shaft is heterogeneous
by

Related questions

The following assumption is not true in the theory of pure torsion: (A) The twist along the shaft is uniform (B) The shaft is of uniform circular section throughout (C) Cross-section of the shaft, which is plane before twist remains plane after twist (D) All radii get twisted due to torsion

Description : The following assumption is not true in the theory of pure torsion:  (A) The twist along the shaft is uniform  (B) The shaft is of uniform circular section throughout  (C) Cross- ... , which is plane before twist remains plane after twist  (D) All radii get twisted due to torsion 

Last Answer : (D) All radii get twisted due to torsion 

A circular shaft subjected to torsion undergoes a twist of 10in a length of 120 cm. If the maximum shear stress induced is limited to 1000 kg/cm2and if modulus of rigidity G = 0.8 x 106then the radius of the shaft should be (a) p/8 (b) p/27 (c) 18/p (d) 27/p

Description : A circular shaft subjected to torsion undergoes a twist of 10in a length of 120 cm. If the maximum shear stress induced is limited to 1000 kg/cm2and if modulus of rigidity G = 0.8 x 106then the radius of the shaft should be (a) p/8 (b) p/27 (c) 18/p (d) 27/p

Last Answer : (d) 27/p

Which of the following is not an assumption in derivation of torsion equation? a. Circular shaft remains circular after twisting b. Plane section of the shaft remain plane after twisting c. Material of shaft is isotropic d. Angle of twist is proportional to radius

Description : Which of the following is not an assumption in derivation of torsion equation? a. Circular shaft remains circular after twisting b. Plane section of the shaft remain plane after twisting c. Material of shaft is isotropic d. Angle of twist is proportional to radius

Last Answer : d. Angle of twist is proportional to radius

Two shafts in torsion will have equal strength if a. Only diameter of the shafts is same b. Only angle of twist of the shaft is same c. Only material of the shaft is same d. Only torque transmitting capacity of the shaft is same

Description : Two shafts in torsion will have equal strength if a. Only diameter of the shafts is same b. Only angle of twist of the shaft is same c. Only material of the shaft is same d. Only torque transmitting capacity of the shaft is same

Last Answer : d. Only torque transmitting capacity of the shaft is same

A shaft of length L is subject to a constant twisting moment T along its length L, then angle q through which one end of the bar will twist relative to other will be (a) T/g (b) T/GJ (c) GJ/TL (d) TL/GJ

Description : A shaft of length L is subject to a constant twisting moment T along its length L, then angle q through which one end of the bar will twist relative to other will be (a) T/g (b) T/GJ (c) GJ/TL (d) TL/GJ

Last Answer : (d) TL/GJ

The variation of shear stress in a circular shaft subjected to torsion is a. Linear b. Parabolic c. Hyperbolic. d. Uniform

Description : The variation of shear stress in a circular shaft subjected to torsion is a. Linear b. Parabolic c. Hyperbolic. d. Uniform

Last Answer : a. Linear

The ratio of strength of a hollow shaft to that of a solid shaft subjected to torsion if both are of the same material and of the same outer diameters, the inner diameter of hollow shaft being half of the outer diameter is a. 15/16 b. 16/15 c. 7/8 d. 8/7

Description : The ratio of strength of a hollow shaft to that of a solid shaft subjected to torsion if both are of the same material and of the same outer diameters, the inner diameter of hollow shaft being half of the outer diameter is a. 15/16 b. 16/15 c. 7/8 d. 8/7

Last Answer : a. 15/16

Calculate the shaft diameter on rigidity basis if torsional moment is 196000N-mm, length of shaft is 1000mm. Permissible angle of twist per meter is 0.5’ and take G=79300N/mm². a) None of the listed b) 41.2mm c) 35.8mm d) 38.8mm

Description : Calculate the shaft diameter on rigidity basis if torsional moment is 196000N-mm, length of shaft is 1000mm. Permissible angle of twist per meter is 0.5’ and take G=79300N/mm². a) None of the listed b) 41.2mm c) 35.8mm d) 38.8mm

Last Answer : b) 41.2mm

A hollow shaft of 1 m length is designed to transmit a power of 30 kW at 700 rpm. The maximum permissible angle of twist in the shaft is 1o. The inner diameter of the shaft is 0.7 times the outer diameter. The modulus of rigidity is 80 GPa. The outside diameter (in mm) of the shaft is _______. (a) 43 to 45 (b) 50to 60 (c) 70 to 80 (d) 85 to 100

Description : A hollow shaft of 1 m length is designed to transmit a power of 30 kW at 700 rpm. The maximum permissible angle of twist in the shaft is 1o. The inner diameter of the shaft is 0.7 times the outer diameter. The modulus of ... shaft is _______. (a) 43 to 45 (b) 50to 60 (c) 70 to 80 (d) 85 to 100

Last Answer : (a) 43 to 45

A shaft a. Is always subjected to pure torsion b. Combination of M & T but no end thrust c. Combination of torque & end thrust but no bending moment d. May be subjected to a combination of M, T and end thrust

Description : A shaft a. Is always subjected to pure torsion b. Combination of M & T but no end thrust c. Combination of torque & end thrust but no bending moment d. May be subjected to a combination of M, T and end thrust

Last Answer : d. May be subjected to a combination of M, T and end thrust

Which of the following is not designed under torsion equation? a. Spindle b. Axle c. Low cost shaft d. Shaft with variable diameter

Description : Which of the following is not designed under torsion equation? a. Spindle b. Axle c. Low cost shaft d. Shaft with variable diameter

Last Answer : b. Axle

A shaft is said to be in pure torsion if a. Turning moment is applied at one end and other end is free b. Turning force is applied at one end and other end is free c. Two opposite turning moments are applied to the shaft d. Combination of torsional load and bending load is applied to the shaft

Description : A shaft is said to be in pure torsion if a. Turning moment is applied at one end and other end is free b. Turning force is applied at one end and other end is free c. Two opposite turning moments are applied to the shaft d. Combination of torsional load and bending load is applied to the shaft

Last Answer : c. Two opposite turning moments are applied to the shaft

The angle of twist for a transmission shaft is inversely proportional to (a) shaft diameter (b) (shaft diameter)2 (c) (shaft diameter)3 (d) (shaft diameter)4

Description : The angle of twist for a transmission shaft is inversely proportional to (a) shaft diameter (b) (shaft diameter)2 (c) (shaft diameter)3 (d) (shaft diameter)4

Last Answer : (a) shaft diameter

While designing shaft on the basis of torsional rigidity, angle of twist is given by? a) 100Ml/Gd⁴ b) 584Ml/Gd⁴ c) 292 Ml/Gd⁴ d) 300 Ml/Gd⁴

Description : While designing shaft on the basis of torsional rigidity, angle of twist is given by? a) 100Ml/Gd⁴ b) 584Ml/Gd⁴ c) 292 Ml/Gd⁴ d) 300 Ml/Gd⁴

Last Answer : b) 584Ml/Gd⁴

For two shafts joined in parallel, the --------------- in each shaft is same. a. shear stress. b. Angle of twist c. torque d. torsional stress.

Description : For two shafts joined in parallel, the --------------- in each shaft is same. a. shear stress. b. Angle of twist c. torque d. torsional stress.

Last Answer : b. Angle of twist

For two shafts joined in series, the --------------- in each shaft is same. a. shear stress. b. Angle of twist c. torque d. torsional stress.

Description : For two shafts joined in series, the --------------- in each shaft is same. a. shear stress. b. Angle of twist c. torque d. torsional stress.

Last Answer : c. torque

Angle of twist of a circular shaft is given by a. GJ/Tl b. Tl/GJ. c. TJ/Gl. d.TG/Jl.

Description : Angle of twist of a circular shaft is given by a. GJ/Tl b. Tl/GJ. c. TJ/Gl. d.TG/Jl.

Last Answer : b. Tl/GJ.

The shafts will have same strength on the basis of torsional rigidity, if (a) diameter and length of both shafts is same (b) material of both shafts is same (c) angle of twist for both shafts is same (d) all of above conditions are satisfied

Description : The shafts will have same strength on the basis of torsional rigidity, if (a) diameter and length of both shafts is same (b) material of both shafts is same (c) angle of twist for both shafts is same (d) all of above conditions are satisfied

Last Answer : (d) all of above conditions are satisfied

Ratio of diameters of two shafts joined in series is 2. If the two shafts have the same material and the same length the ratio of their angles of twist is a. 2 b. 4 c. 8 d. 16

Description : Ratio of diameters of two shafts joined in series is 2. If the two shafts have the same material and the same length the ratio of their angles of twist is a. 2 b. 4 c. 8 d. 16

Last Answer : d. 16

A power transmitting ductile material shaft under P, T and M will be designed on the basis of (a) Rankine theory (b) Guest Theory (c) Haigh theory (d) None

Description : A power transmitting ductile material shaft under P, T and M will be designed on the basis of (a) Rankine theory (b) Guest Theory (c) Haigh theory (d) None

Last Answer : (b) Guest Theory

The material used for making torsion bar is (a) Steel (b) Cast iron (c) High carbon steel (d) All of the above

Description : The material used for making torsion bar is (a) Steel (b) Cast iron (c) High carbon steel (d) All of the above

Last Answer : (a) Steel

Two shafts will have equal strength, if (a) diameter of both the shafts is same (b) angle of twist of both the shafts is same (c) material of both the shafts is same (d) twisting moment of both the shafts is same

Description : Two shafts will have equal strength, if (a) diameter of both the shafts is same (b) angle of twist of both the shafts is same (c) material of both the shafts is same (d) twisting moment of both the shafts is same

Last Answer : d) twisting moment of both the shafts is same

For the same material, length and given torque, a hollow shaft weighs……………… a solid shaft. (a) Less than (b) More than (c) Equal to (d) None of these

Description : For the same material, length and given torque, a hollow shaft weighs……………… a solid shaft. (a) Less than (b) More than (c) Equal to (d) None of these

Last Answer : (a) Less than

The strength of a hollow shaft is ……… for the same length, material and weight of a solid shaft. (a) More (b) Less (c) Equal (d) None of these

Description : The strength of a hollow shaft is ……… for the same length, material and weight of a solid shaft. (a) More (b) Less (c) Equal (d) None of these

Last Answer : (b) Less

For same length, same material, same length a. Weight of solid shaft is less than weight of hollow shaft b. Weight of solid shaft is more than weight of hollow shaft c. Weight of hollow and solid shafts will be same d. Sometime more sometime less

Description : For same length, same material, same length a. Weight of solid shaft is less than weight of hollow shaft b. Weight of solid shaft is more than weight of hollow shaft c. Weight of hollow and solid shafts will be same d. Sometime more sometime less

Last Answer : b. Weight of solid shaft is more than weight of hollow shaft

For same weight, same material, same length a. Solid shaft is always stronger than a hollow shaft b. Solid shaft is always weaker than a hollow shaft and strength ratio will depend upon Do/Di of hollow shaft c. Strength of both the shafts in equal d. Strength of a solid shaft is always weaker and the strength ratio will depend upon Do/Di of hollow shaft

Description : For same weight, same material, same length a. Solid shaft is always stronger than a hollow shaft b. Solid shaft is always weaker than a hollow shaft and strength ratio will depend upon Do/Di of ... of a solid shaft is always weaker and the strength ratio will depend upon Do/Di of hollow shaft

Last Answer : b. Solid shaft is always weaker than a hollow shaft and strength ratio will depend upon Do/Di of hollow shaft

The strength of a hollow shaft for the same length, material and weight is ---------- a solid shaft. a. less than. b. more than. c. equal to. d. not equal to.

Description : The strength of a hollow shaft for the same length, material and weight is ---------- a solid shaft. a. less than. b. more than. c. equal to. d. not equal to.

Last Answer : b. more than.

For the same material, length and given torque a hoolow shaft weighs ---------- a solid shaft. a. less than b. more than. c. equal to d. not equal to.

Description : For the same material, length and given torque a hoolow shaft weighs ---------- a solid shaft. a. less than b. more than. c. equal to d. not equal to.

Last Answer : a. less than

The shear stress varies from centre to the surface of the shaft with (a) Uniform rate (b) Varying rate (c) Remains same (d) None of these

Description : The shear stress varies from centre to the surface of the shaft with (a) Uniform rate (b) Varying rate (c) Remains same (d) None of these

Last Answer : (a) Uniform rate

The length of a column, having a uniform circular cross-section of 7.5 cm diameter and whose endsare hinged, is 5 m. If the value of E for the material is 2100 tonnes/cm2, the permissible maximumcrippling load will be (a) 1.288 tonnes (b) 12.88 (c) 128.8 tonnes (d) 288.0

Description : The length of a column, having a uniform circular cross-section of 7.5 cm diameter and whose endsare hinged, is 5 m. If the value of E for the material is 2100 tonnes/cm2, the permissible maximumcrippling load will be (a) 1.288 tonnes (b) 12.88 (c) 128.8 tonnes (d) 288.0

Last Answer : (b) 12.88

Elongation of a bar of uniform cross section of length ‘L’, due to its own weight ‘W’ is given by a. 2WL/E b. WL/E c. WL/2E d. WL/3E Where, E=Young’s modulus of elasticity of material

Description : Elongation of a bar of uniform cross section of length ‘L’, due to its own weight ‘W’ is given by a. 2WL/E b. WL/E c. WL/2E d. WL/3E Where, E=Young’s modulus of elasticity of material

Last Answer : c. WL/2E

Two shafts A and B are made of the same material. The diameter of the shaft A is twice as that of shaft B. The power transmitted by the shaft A will be ........... of shaft B. (a) twice (b) four times (c) eight times (d) sixteen times

Description : Two shafts A and B are made of the same material. The diameter of the shaft A is twice as that of shaft B. The power transmitted by the shaft A will be ........... of shaft B. (a) twice (b) four times (c) eight times (d) sixteen times

Last Answer : (c) eight times

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

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

The type of spring used to achieve any linear and non-linear load-deflection characteristics is (a)spiral spring (b) non-ferrous spring (c)Belleville spring (d) torsion spring

Description : The type of spring used to achieve any linear and non-linear load-deflection characteristics is (a)spiral spring (b) non-ferrous spring (c)Belleville spring (d) torsion spring

Last Answer : (c)Belleville spring

When a close-coiled helical spring is subjected to an axial load, it is said to be under. (a) Bending (b) Shear (c) Torsion (d) Crushing

Description : When a close-coiled helical spring is subjected to an axial load, it is said to be under. (a) Bending (b) Shear (c) Torsion (d) Crushing

Last Answer : (c) Torsion

Flexible shafts have ___ rigidity in torsion making them flexible. a) Low b) High c) Very high d) Infinitely small

Description : Flexible shafts have ___ rigidity in torsion making them flexible. a) Low b) High c) Very high d) Infinitely small

Last Answer : b) High

Which of the following loading is considered for the design of axles ? (a) Bending moment only (b) Twisting moment only (c) Combined bending moment and torsion (d) Combined action of bending moment, twisting moment and axial thrust

Description : Which of the following loading is considered for the design of axles ? (a) Bending moment only (b) Twisting moment only (c) Combined bending moment and torsion (d) Combined action of bending moment, twisting moment and axial thrust

Last Answer : (a) Bending moment only

The ratio of strengths of solid to hollow shafts, both having outside diameter D and hollow having inside diameter D/2, in torsion, is a.1/4 b. 1/2 c. 1/16 d. 15/16

Description : The ratio of strengths of solid to hollow shafts, both having outside diameter D and hollow having inside diameter D/2, in torsion, is a.1/4 b. 1/2 c. 1/16 d. 15/16

Last Answer : d. 15/16

A member subjected to couple produces rotational motion about its longitudinal axis called as ________ a. torsion b. twisting moment c. both a. and b. d. bending moment

Description : A member subjected to couple produces rotational motion about its longitudinal axis called as ________ a. torsion b. twisting moment c. both a. and b. d. bending moment

Last Answer : c. both a. and b.

In combined bending and torsion equivalent bending moment is a. Me = (M^2 + T^2)^1/2 b. Me = ½(M^2 + T^2)^1/2 c. Me = M+(M^2 + T^2)^1/2 d. Me = 1/2 [M+(M^2 + T^2)^1/2]

Description : In combined bending and torsion equivalent bending moment is a. Me = (M^2 + T^2)^1/2 b. Me = ½(M^2 + T^2)^1/2 c. Me = M+(M^2 + T^2)^1/2 d. Me = 1/2 [M+(M^2 + T^2)^1/2]

Last Answer : d. Me = 1/2 [M+(M^2 + T^2)^1/2]

Equivalent torque in combined bending and torsion is given by a. Te = (M^2 + T^2)^1/2 b. Te = ½(M^2 + T^2)^1/2 c. Te = M + T d. Te = 1/2 [M+(M^2 + T^2)^1/2]

Description : Equivalent torque in combined bending and torsion is given by a. Te = (M^2 + T^2)^1/2 b. Te = ½(M^2 + T^2)^1/2 c. Te = M + T d. Te = 1/2 [M+(M^2 + T^2)^1/2]

Last Answer : a. Te = (M^2 + T^2)^1/2

Which of the following is incorrect? a. In torsion equation, we use mean torque b. In torsion equation, we use maximum torque c. Many shafts are designed under combined bending and torsion load d. Shafts are also designed for torsional rigidity

Description : Which of the following is incorrect? a. In torsion equation, we use mean torque b. In torsion equation, we use maximum torque c. Many shafts are designed under combined bending and torsion load d. Shafts are also designed for torsional rigidity

Last Answer : a. In torsion equation, we use mean torque

In a simple bending theory, one of the assumption is that the plane sections before bending remain plane after bending. This assumption means that a. stress is uniform throughout the beam b. strain is uniform throughout the beam c. stress is proportional to the distance from the neutral axis d. strain is proportional to the distance from the neutral axis

Description : In a simple bending theory, one of the assumption is that the plane sections before bending remain plane after bending. This assumption means that a. stress is uniform throughout the beam b. ... the distance from the neutral axis d. strain is proportional to the distance from the neutral axis

Last Answer : d. strain is proportional to the distance from the neutral axis

The angle of twist for the equivalent bar to a spring is given by? (Symbols have their usual meaning) a) 8PD²N/Gd⁴ b) 16PD²N/Gd⁴ c) 16PDN/Gdᵌ d) 8PDN/Gdᵌ

Description : The angle of twist for the equivalent bar to a spring is given by? (Symbols have their usual meaning) a) 8PD²N/Gd⁴ b) 16PD²N/Gd⁴ c) 16PDN/Gdᵌ d) 8PDN/Gdᵌ

Last Answer : b) 16PD²N/Gd⁴

Axle is frequently used in -----------------transmission. a) torque b) twist c) force d) direct

Description : Axle is frequently used in -----------------transmission. a) torque b) twist c) force d) direct

Last Answer : a) torque

The angle of twist is ------------- proportional to the twisting moment. a. directly. b. inversely. c. indirectly. d. reversely.

Description : The angle of twist is ------------- proportional to the twisting moment. a. directly. b. inversely. c. indirectly. d. reversely.

Last Answer : a. directly.

The standard length of the shaft is (a) 5 m (b) 8 m (c) 9 m (d) 10m

Description : The standard length of the shaft is (a) 5 m (b) 8 m (c) 9 m (d) 10m

Last Answer : (a) 5 m

A power transmitting ductile material shaft under P, T and M will fail under (a) Tensile considerations only (b) Compressive considerations only (c) Shear considerations only (d) None

Description : A power transmitting ductile material shaft under P, T and M will fail under (a) Tensile considerations only (b) Compressive considerations only (c) Shear considerations only (d) None

Last Answer : (c) Shear considerations only

Which material is suitable for shaft material? a. High speed steel b. Stainless steel or high carbon steel c. Grey cast iron d. Steel having approx. 0.4% carbon and 0.8% manganese

Description : Which material is suitable for shaft material? a. High speed steel b. Stainless steel or high carbon steel c. Grey cast iron d. Steel having approx. 0.4% carbon and 0.8% manganese

Last Answer : d. Steel having approx. 0.4% carbon and 0.8% manganese

A solid shaft of same cross sectional area and of same material as that of a hollow shaft can resist a. Less torque. b. More torque. c. Equal torque. d. Unequal torque.

Description : A solid shaft of same cross sectional area and of same material as that of a hollow shaft can resist a. Less torque. b. More torque. c. Equal torque. d. Unequal torque.

Last Answer : a. Less torque.