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

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
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Answer :

(c) proof load
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The laminated springs are given initial curvature (a) To have uniform strength (b) To make it more economical (c) So that plates may become flat, when subjected to design load (d) None of these

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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 leaves are 100mm and 12mm respectively. Calculate the initial pre load required to close the nip. (a) 4332.2N (b) 4674.1N (c) 4985.4N (d) Can’t be determined

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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

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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

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The close-coiled helical springs ‘A’ and ‘B’ are of same material, same coil diameter, same wire diameter and subjected to same load. If the number of turns of spring ‘A’ is half that of spring ‘B’, the ratio of deflection of spring ‘A’ to spring ‘B’ is (a)1/2 (b) 1 (c) 2 (d) 4

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A short, hollow cast iron cylinder with a wall thickness of 1 cm is to carry a compressive load of 10 tonnes. If the working stress in compression is 800 kg/cm2, the outside diameter of the cylinder should not be less than a) 0.5cm b) 5 cm c) 2.5cm d) 4.5 cm

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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

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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

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The weight or pressure required to deflect a spring in mm is called the spring (a) Weight (b) deflection (c) rate (d) rebound

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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 shackled and the rear end is pin joined (c) both end of the spring are shackled (d) both end of the spring are pin joined

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

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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

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There are number of laminations in a (a) Close coiled spring (b) Open coiled spring (c) Spiral spring (d) None

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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

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Spiral spring is quite rigid. (a) Yes (b) No it is flexible (c) It is of moderate rigidity (d) Rigidity can’t be determined

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

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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

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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

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

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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

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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 leaves are 100mm and 12mm respectively. If modulus of elasticity is 207000N/mm², calculate the initial nip. (a) 26.8mm (b) 24.9mm (c) 22.5mm (d)23.1mm

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

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

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Shackles are sort of (a) coupling (b) link (c) spring (d) none of the above

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The spring used in mechanical toys is (a) Leaf spring (b) Spiral spring (c) Helical spring (d) All of these

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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

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

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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 (

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Last Answer : (b) To run the watch

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

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In spring balances, the spring is used (a) To apply forces (b) To absorb shocks (c) To store strain energy (d) To measure forces

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Deflection in a spring should be (a) Large (b) Small (c) Zero (d) None

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Last Answer : (a) Large

Strain energy in a spring should be (a) Large (b) Small (c) Zero (d) None

Description : Strain energy in a spring should be (a) Large (b) Small (c) Zero (d) None

Last Answer : (a) Large

Spring is an (a) Elastic device (b) Plastic device (c) Elastic as well as plastic device (d) None

Description : Spring is an (a) Elastic device (b) Plastic device (c) Elastic as well as plastic device (d) None

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Strain energy in a leaf spring is (a) W x δ (b) W x δ/3 (c) W x δ/2 (d) None

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