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
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
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
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
Description : When a beam is subjected to a bending moment the strain in a layer is …………the distance from the neutral axis. (a) Independent of (b) Directly proportional to (c) Inversely proportional to (d) None of these
Last Answer : (b) Directly proportional to
Description : In shafts with keyways the allowable stresses are usually ------------ proportional to the twisting moment. a.25% b. 50% c. 75% d. 95%
Last Answer : c. 75%
Description : If in a bar after twisting moment T has been applied, a line on surface is moved by an angle g then shearing moment will be (a) t/g (b) g (c) g/t (d) none of these
Last Answer : (b) g
Description : Pick up the incorrect statement from the following: The torsional resistance of a shaft is directly proportional to (A) Modulus of rigidity (B) Angle of twist (C) Reciprocal of the length of the shaft (D) Moment of inertia of the shaft section
Last Answer : (D) Moment of inertia of the shaft section
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
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
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 : (D) (Shaft diameter)4
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
Description : The relationship among twisting moment(T) acting on a rotating shaft, power in watt(W), and angular velocity in radian per second(w) will be (a) T = W/w (b) W = Tw (c) W = T/w (d) none of these
Last Answer : (b) W = Tw
Description : At fully plastic twisting moment (a) only fibres at surface are stressed to yield point in shear (b) fibres at centre are stressed to yield point in shear (c) all fibres are stressed to yield point in shear (d) none of these
Last Answer : (c) all fibres are stressed to yield point in shear
Description : For a solid or a hollow shaft subject to a twisting moment T, the torsional shearing stress t at a distance r from the centre will be (a) t = Tr/J (b) t = Tr (c) t = TJ/r (d) none of these
Last Answer : (a) t = Tr/J
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.
Description : The product of the tangential force acting on the shaft and radius of shaft known as (a) Torsional rigidity (b) Flexural rigidity (c) Bending moment (d) Twisting moment
Last Answer : (d) Twisting moment
Description : When a shaft is subjected to a twisting moment, every cross-section of the shaft will be under (a) Tensile stress (b) Compressive stress (c) Shear stress (d) All of these
Last Answer : c) Shear stress
Description : Strength of a shaft a. Is equal to maximum shear stress in the shaft at the time of elastic failure b. Is equal to maximum shear stress in the shaft at the time of rupture c. Is equal to torsional rigidity d. Is ability to resist maximum twisting moment
Last Answer : d. Is ability to resist maximum twisting moment
Description : A beam is a structural member which is subjected to (a) Axial tension or compression (b) Transverse loads and couples (c) Twisting moment (d) No load, but its axis should be horizontal and x-section rectangular or circular
Last Answer : b) Transverse loads and couples
Description : In a shaft, the shear stress is not directly proportional to (A) Radius of the shaft (B) Angle of twist (C) Length of the shaft (D) Modulus of rigidity
Last Answer : (C) Length of the shaft
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
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
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
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
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
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
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
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.
Description : In a shaft shear stress intensity at a point is not (A) Directly proportional to the distance from the axis (B) Inversely proportional to the distance from the axis (C) Inversely proportional to the polar moment of inertia (D) Directly proportional to the applied torque
Last Answer : (B) Inversely proportional to the distance from the axis
Description : The shear strength of a soil (A) Is directly proportional to the angle of internal friction of the soil (B) Is inversely proportional to the angle of internal friction of the soil (C) Decreases with increase in normal stress (D) Decreases with decrease in normal stress
Last Answer : Answer: Option D
Description : Coil springs absorb shocks by (a) bending (b) twisting (c) compression (d) tension
Last Answer : (c) compression
Description : Leaf springs absorb shocks by (a) bending (b) twisting (c) compression (d) tension
Last Answer : a) bending
Description : Coil springs absorb shocks by (A) bending (B) twisting (C) compression (D) tension
Last Answer : (C) compression
Description : It is a secondary shaft used to counter the direction of main shaft. 81. Shafts are subjected to ______ forces. a) Compressive b) Tensile c) Shear d) twisting
Last Answer : b) Tensile
Description : Axle is frequently used in -----------------transmission. a) torque b) twist c) force d) direct
Last Answer : a) torque
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
Description : 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
Last Answer : a. Shaft is perfectly straight b. Material of the shaft is heterogeneous
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
Description : why do hawthorn trunks twist? Is the trunk twisting or just the bark?
Last Answer : Need Answer
Description : What is the purpose of inboard ailerons? a. To reduce wing bending at high speed b. To reduce wing twisting at low speed c. To reduce wing bending at low speed d. To reduce wing twist at high speed
Last Answer : d. To reduce wing twist at high speed
Description : Which of the following laminas have same moment of inertia (Ixx = Iyy), when passed through the centroid along x-x and y-y axes? a. Circle b. Semi-circle c. Right angle triangle d. Isosceles triangle
Last Answer : a. Circle
Description : The periodic time of a body moving in Simple Harmonic Motion is a.Directly proportional to its angular velocity b.Directly proportional to the weight of the body c.Inversely proportional to ... d.Directly proportional to the momentum of swinging body e.Inversely proportional to the angular velocity
Last Answer : e. Inversely proportional to the angular velocity
Description : Let the only force acting on two bodies be their mutual interactions. If both bodies start from rest, the distances travelled by each will be a a.proportional to the respective masses of the ... masses of the bodies e.inversely proportional to the square of the respective masses of the bodies
Last Answer : c. inversely proportional to the respective masses of the bodies
Description : If the substrate concentration is much below the km of the enzyme, the velocity of the reaction is (A) Directly proportional to substrate concentration (B) Not affected by enzyme concentration (C) Nearly equal to Vmax (D) Inversely proportional to substrate concentration
Last Answer : Answer : A
Description : The velocity of sound is ….. the density of the medium. (a) Directly proportional to (b) Inversely proportional to (c) Directly proportional to the square root of (d) Inversely proportional to the square root of
Last Answer : Ans:(d)
Description : The frequency of vibration of a stretched string is _______ its length. (a) Directly proportional to (b) Inversely proportional to (c) Directly proportional to the square of (d) Independent of
Last Answer : Ans:(b)
Description : Average density of the Earth (a) Is directly proportional to g (b) Is inversely proportional to g (c) Does not depend on g (d) Is a complex function of g
Last Answer : Ans:(c)
Description : The demand curve shows that price and quantity demanded are - (1) directly related only (2) directly proportional and also directly related (3) inversely proportional and aslo inversely related (4) inversely related only
Last Answer : (3) inversely proportional and aslo inversely related Explanation: Law of demand states that consumers buy more of a good when its price is lower and less when its price is higher. It states that ... good demanded by the consumer will be negatively correlated to the change in the price of the good.