Description : What is the Wahl's factor if spring index is 6? a. 1.477 b. 0.995 c. 1.252 d. None of the above
Last Answer : c. 1.252
Description : Determine number of coils in a helical compression spring, if modulus of rigidity is 80 Gpa and spring stiffness is 50 N/ mm. Assume wire diameter and spring index as 8 mm and 5 respectively a. 11.8 turns b. 12.8 turns c. 13.3 turns d. None of the above
Last Answer : b. 12.8 turns
Description : Spring index is (a) D – d (b) D/d (c) D2 –d2 (d) None
Last Answer : (b) D/d
Description : Find the shear stress in the spring wire used to design a helical compression sprig if a load of 1200N is applied on the spring. Spring index is 6, and wire diameter 7mm. a) 452.2N/mm² b) 468.6N/mm² c) 512.2N/mm² d) None of the listed
Last Answer : b) 468.6N/mm²
Description : Find the Wahl’s factor if spring index is 6. a) 1.2020 b) 1.2424 c) 1.2525 d) 1.5252
Last Answer : c) 1.2525
Description : Rankine’s formula is generally used when slenderness ratio lies in between (a) 0-60 (b) 0-80 (c) 0-100 (d) Any value
Last Answer : (d) Any value
Description : The laminated spring which is in common use, is of the type (a) full elliptic (b) semi elliptic (c)one quarter elliptic (d)three quarter elliptic
Last Answer : (b) semi elliptic
Description : The most important property for the spring material is (a) High elastic limit (b) High deflection value (c) Resistance to fatigue and shock (d) All of these
Last Answer : (d) All of these
Description : If a close-coiled helical spring absorbs 50 N-mm of energy while extending by 5 mm, its stiffness will be (a) 2 N/mm (b) 4 N/mm (c) 6 N/mm (d) 10 N/mm
Last Answer : (d) 10 N/mm
Description : A spring with 25 active coils cannot be accommodated within a given space. Hence 5 coils of the spring are cut. The stiffness of the new spring will be a. the same b. 1.25 times the original spring c. 0.8 times the original spring d. 20 times the original spring
Last Answer : b. 1.25 times the original spring
Description : Initial gap between two turns of a close coil helical tension spring should be a. 0.5 mm b. based on the maximum deflection c. 1 mm d. zero
Last Answer : d. zero
Description : In a square and ground helical spring the effective number of turns is incresead by a. 1 b. 2 c. 1.5 d. 0 Ans: b 77. Frequency of the fluctuating load of helical compression ... vibration c. slightly greater than the natural frequency d. twenty times less than the natural frequency of vibration
Last Answer : d. twenty times less than the natural frequency of vibration
Description : A helical spring is fabricated by wrapping wire 19.05 mm in diameter around a forming cylinder 203.2 mm in diameter. Compute the number of turns required to permit an elongation of 101.6 mm. without exceeding a shearing ... G = 82737 N/mm2. a. 10 turns b. 20 turns c. 25 turns d. 30 turns
Last Answer : a. 10 turns
Description : A compression spring is made of music wire of 2 mm diameter having a shear strength and shear modulus of 800 Mpa and 80 Gpa respectively. The mean coil diameter is 20mm, free length is 40 mm, and the number ... by 8 times b. decreased by 2 times c. increased by 2 times d. decreased by 8 times
Last Answer : a. increased by 8 times
Description : If a spring has plain ends then number of inactive coils is? a) 1 b) 2 c) 3 d) 0
Last Answer : d) 0
Description : Determine the maximum shearing stress and elongation in a helical steel spring composed of 20 turns of 20-mm-diameter wire on a mean radius of 90 mm when the spring is supporting a load of 1.5 kN. and G = 83 GPa. a. 200 mm b. 105.4 mm c. 150 mm d. 250 mm
Last Answer : b. 105.4 mm
Description : Find total number coils in a spring having square and ground ends. Deflection in the spring is 6mm when load of 1100N is applied. Modulus of rigidity is 81370N/mm². Wire diameter and pitch circle diameter are 10mm and 50mm respectively. a) 7 b) 6 c) 5 d) 4
Last Answer : a) 7
Description : In case of a laminated spring, the load at which the plates become straight is called (a) working load (b) safe load (c) proof load (d) none
Last Answer : (c) proof load
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
Description : The type of spring used to achieve greater load carrying capacity within given space is (a)spiral spring (b) springs in series (c)multi-leaf spring (d) concentric spring
Last Answer : (d) concentric spring
Description : With a leaf spring type of suspension, interference between steering and suspension system can be (a) front end of the spring is pin joined and the rear end is shackled (b) front end of the spring is ... joined (c) both end of the spring are shackled (d) both end of the spring are pin joined
Last Answer : (b) front end of the spring is shackled and the rear end is pin joined
Description : The clips placed at intervals along some leaf spring to prevent spring leaf separation on rebound are (a) rebound clips (b) separation clips (c) interval clips (d)relief clips
Last Answer : (a) rebound clips
Description : The device that permits variation in the distance between the spring eyes of a leaf spring as the spring flexes is called (a) Spring shackle (b) spring U bolt (c) spring hanger (d) spring leaf
Last Answer : (a) Spring shackle
Description : Leaf spring for vehicles are nipped to (a) To vary the effective length of the spring (b) to increase the interleaf friction (c) Improve the load carrying capacity of spring (d) ensure that all leaves are uniformly stressed during loading
Last Answer : (d) ensure that all leaves are uniformly stressed during loading
Description : The weight or pressure required to deflect a spring in mm is called the spring (a) Weight (b) deflection (c) rate (d) rebound
Last Answer : c) rate
Description : There are number of laminations in a (a) Close coiled spring (b) Open coiled spring (c) Spiral spring (d) None
Last Answer : (d) None
Description : Most important features of any spring are (a) Deflection, stiffness and strength (b) Stiffness, bending and shear strengths (c) Strain energy, deflection and strength (d) None
Last Answer : (c) Strain energy, deflection and strength
Description : Spiral spring is quite rigid. (a) Yes (b) No it is flexible (c) It is of moderate rigidity (d) Rigidity can’t be determined
Last Answer : (b) No it is flexible
Description : What will happen if stresses induced due to surge in the spring exceeds the endurance limit stress of the spring. (a) Fatigue Failure (b) Fracture (c) None of the listed (d) Nipping
Last Answer : (a) Fatigue Failure
Description : A concentric spring consists of 2 sprigs of diameter 10mm and 4mm. The net force acting on the composite spring is 5000N. Find the force acting on each of the two springs. (a) 1232.2N and 3767.8N (b) 786.4N and 4213.6N (c) 689.7N and 4310.3N (d) 645.3N and 4354.7N
Last Answer : (c) 689.7N and 4310.3N
Description : The strain energy stored in a spiral spring is given by? (a) 12M²L/Ebtᵌ (b) 6M²L/Ebtᵌ (c) 8M²L/Ebtᵌ (d) None of the listed
Last Answer : (b) 6M²L/Ebtᵌ
Description : Belleville spring can only produce linear load deflection characteristics. (a) Only linear (b) Linear as well as non linear (c) Non-linear (d) None of the mentioned
Last Answer : (b) Linear as well as non linear
Description : A leaf spring consists of 3 extra full length leaves and 14 graduated length leaves. The maximum force that can act on the spring is 70kN and the distance between eyes of the spring is 1.2m. Width and thickness of the ... close the nip. (a) 4332.2N (b) 4674.1N (c) 4985.4N (d) Can't be determined
Last Answer : (b) 4674.1N
Description : A leaf spring consists of 3 extra full length leaves and 14 graduated length leaves. The maximum force that can act on the spring is 70kN and the distance between eyes of the spring is 1.2m. Width and thickness of the ... /mm², calculate the initial nip. (a) 26.8mm (b) 24.9mm (c) 22.5mm (d)23.1mm
Last Answer : b) 24.9mm
Description : Spring shackles are used to join (a) chassis frame and spring (b) Spring and Axle (c) chassis frame and axle (d) all of the above
Last Answer : (a) chassis frame and spring
Description : Shackles are sort of (a) coupling (b) link (c) spring (d) none of the above
Last Answer : (b) link
Description : The spring used in mechanical toys is (a) Leaf spring (b) Spiral spring (c) Helical spring (d) All of these
Last Answer : (b) Spiral spring
Description : A spring used to absorb shocks and vibrations is (a) Close-coil helical spring (b) Open coiled helical spring (c) Spiral spring (d) Leaf spring
Last Answer : (d) Leaf spring
Description : In a watch, the spring is used to store energy. The energy is released (a) To stop the watch (b) To run the watch (c) To change the time (d) All of these (
Last Answer : (b) To run the watch
Description : In spring balances, the spring is used (a) To apply forces (b) To absorb shocks (c) To store strain energy (d) To measure forces
Last Answer : (d) To measure forces
Description : The load required to produce a unit deflection in the spring is called (a) Modulus of Rigidity (b) Spring stiffness (c) Flexural rigidity (d) Tensional rigidity
Last Answer : b) Spring stiffness
Description : Deflection in a spring should be (a) Large (b) Small (c) Zero (d) None
Last Answer : (a) Large
Description : Strain energy in a spring should be (a) Large (b) Small (c) Zero (d) None
Description : Spring is an (a) Elastic device (b) Plastic device (c) Elastic as well as plastic device (d) None
Last Answer : (a) Elastic device
Description : Strain energy in a leaf spring is (a) W x δ (b) W x δ/3 (c) W x δ/2 (d) None
Last Answer : (c) W x δ/2
Description : Overlap in a leaf spring is (a) L/n (b) L/2n (c) L/3n (d) None
Last Answer : (b) L/2n
Description : Maximum deflection in a leaf spring is given by (a) 3WL3/4Enbt3 (b) 3WL3/8Enbt3 (c) 3WL3/16Enbt3 (d) None
Last Answer : (b) 3WL3/8Enbt3
Description : Maximum bending stress in a leaf spring is (a) 3WL/4nbt2(b) 3WL/8nbt2(c) 3WL/2nbt2(d) None
Last Answer : (c) 3WL/2nbt2
Description : A spring of stiffness 100 N/mm used in a spring-loaded safety valve of diameter 20 mm on a boiler with the pressure inside the boiler equal to 1 MPa should be initially compressed by a. 5mm b. 3.14 mm c. 2mm d. 6.28 mm
Last Answer : b. 3.14 mm