Concentric springs are used, (A) To achieve greater load carrying capacity with given space (B) To achieve fail-safe system (C) To eliminate surge (D) Any of the above objectives

Concentric springs are used,

(A) To achieve greater load carrying capacity with given space

(B) To achieve fail-safe system

(C) To eliminate surge

(D) Any of the above objectives
by

1 Answer

Answer :

(D) Any of the above objectives
by

Related questions

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 springs

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 springs

Last Answer : (D) Concentric springs

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

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

In concentric springs, vibrations called surge are amplified. a) True b) False

Description : In concentric springs, vibrations called surge are amplified. a) True b) False

Last Answer : b) False

When two concentric springs are made of same material, having same free length and compressed equally by axial load, then the load shared by each spring is proportional to (A) Spring index of each spring (B) Wire diameter of each spring (C) Mean coil diameter of each spring (D) Square of wire diameter of each spring

Description : When two concentric springs are made of same material, having same free length and compressed equally by axial load, then the load shared by each spring is proportional to (A) Spring index of each spring ... spring (C) Mean coil diameter of each spring (D) Square of wire diameter of each spring

Last Answer : (D) Square of wire diameter of each spring

The static load carrying capacity of fine threads is greater than that of coarse threads. a) True b) False

Description : The static load carrying capacity of fine threads is greater than that of coarse threads. a) True b) False

Last Answer : b) False

A concentric spring consist of two helical compression springs (A) both springs always have right hand helix (B) both springs always have left hand helix (C) both springs always have opposite hand of helices (D) any of the above

Description : A concentric spring consist of two helical compression springs (A) both springs always have right hand helix (B) both springs always have left hand helix (C) both springs always have opposite hand of helices (D) any of the above

Last Answer : (C) both springs always have opposite hand of helices

Can concentric springs be used to obtain a force which is not proportional to its deflection? a) True b) False

Description : Can concentric springs be used to obtain a force which is not proportional to its deflection? a) True b) False

Last Answer : a) True

Which of the following are not true for petroff’s equation? a) Shaft is considered concentric with the bearing b) Bearing is subjected to light load c) Is used to find coefficient of friction d) Frictional torque is given by fpr2l

Description : Which of the following are not true for petroff’s equation? a) Shaft is considered concentric with the bearing b) Bearing is subjected to light load c) Is used to find coefficient of friction d) Frictional torque is given by fpr2l

Last Answer : d) Frictional torque is given by fpr2l

The connecting rod bolts are tightened up with the initial tension greater than external load so that (A) Failure of bolt will be static (B) The resultant load on bolt will not be affected by external cyclic load (C) The bolt will not fail by fatigue although the external load is fluctuating (D) All the three

Description : The connecting rod bolts are tightened up with the initial tension greater than external load so that (A) Failure of bolt will be static (B) The resultant load on bolt will not be affected by ... ) The bolt will not fail by fatigue although the external load is fluctuating (D) All the three

Last Answer : (D) All the three

The dynamic load-carrying capacity of a bearing is defined as the radial load in radial bearings that can be carried for a minimum life of 1000 revolutions. (a) True (b) False

Description : The dynamic load-carrying capacity of a bearing is defined as the radial load in radial bearings that can be carried for a minimum life of 1000 revolutions. (a) True (b) False

Last Answer : (b) False

What is the main advantage of hydrodynamic bearing over roller bearing? (a) Easy to assemble [IES-2005] (b) Relatively low price (c) Superior load carrying capacity at higher speeds (d) Less frictional resistance

Description : What is the main advantage of hydrodynamic bearing over roller bearing? (a) Easy to assemble [IES-2005] (b) Relatively low price (c) Superior load carrying capacity at higher speeds (d) Less frictional resistance

Last Answer : (c) Superior load carrying capacity at higher speeds

Petroff’s equation is used to find out (A) Load carrying capacity of the bearing (B) Frictional losses in the bearing (C) Unit bearing pressure on the bearing (D) Pressure distribution around the periphery of the journal

Description : Petroff’s equation is used to find out (A) Load carrying capacity of the bearing (B) Frictional losses in the bearing (C) Unit bearing pressure on the bearing (D) Pressure distribution around the periphery of the journal

Last Answer : (B) Frictional losses in the bearing

Sommerfeld number is (A) Similar to bearing characteristic number (B) Similar to Reynold’s number (C) Dimensionless parameter that contains all the design parameters (D) Used to find out dynamic load carrying capacity of the hydrodynamic bearing

Description : Sommerfeld number is (A) Similar to bearing characteristic number (B) Similar to Reynold’s number (C) Dimensionless parameter that contains all the design parameters (D) Used to find out dynamic load carrying capacity of the hydrodynamic bearing

Last Answer : (C) Dimensionless parameter that contains all the design parameters

The dynamic load carrying capacity of a bearing is defined as the radial load in radial bearings that can be carried for a minimum life of 1000 revolutions. a) True b) False

Description : The dynamic load carrying capacity of a bearing is defined as the radial load in radial bearings that can be carried for a minimum life of 1000 revolutions. a) True b) False

Last Answer : b) False

Two concentric springs with stiffness equal to 100 N/mm and 80 N/mm respectively, when subjected to load of 900N will deflect by a. 9mm b. 11.25 mm c. 5mm d. 31.5 mm

Description : Two concentric springs with stiffness equal to 100 N/mm and 80 N/mm respectively, when subjected to load of 900N will deflect by a. 9mm b. 11.25 mm c. 5mm d. 31.5 mm

Last Answer : c. 5mm

The type of spring used to achieve any linear or non-linear load-deflection characteristic is (A) Spiral spring (B) Non-ferrous spring (C) Belleville (coned disk) spring (D) Torsion spring

Description : The type of spring used to achieve any linear or non-linear load-deflection characteristic is (A) Spiral spring (B) Non-ferrous spring (C) Belleville (coned disk) spring (D) Torsion spring

Last Answer : (C) Belleville (coned disk) spring

In hydrodynamic bearing, (A) The axis of journal is eccentric with respect to axis of bearing (B) The axis of journal is concentric with respect to axis of bearing (C) The axis can be either eccentric or concentric depending upon speed (D) None of the above

Description : In hydrodynamic bearing, (A) The axis of journal is eccentric with respect to axis of bearing (B) The axis of journal is concentric with respect to axis of bearing (C) The axis can be either eccentric or concentric depending upon speed (D) None of the above

Last Answer : (A) The axis of journal is eccentric with respect to axis of bearing

In hydrostatic bearing, (A) The axis of journal is eccentric with respect to axis of bearing (B) The axis of journal is concentric with respect to axis of bearing (C) The axis can be either eccentric or concentric depending upon speed (D) None of the above

Description : In hydrostatic bearing, (A) The axis of journal is eccentric with respect to axis of bearing (B) The axis of journal is concentric with respect to axis of bearing (C) The axis can be either eccentric or concentric depending upon speed (D) None of the above

Last Answer : (B) The axis of journal is concentric with respect to axis of bearing

For finding out the bending moment for the arm (spoke) of flywheel the arm is assumed as 1. a cantilever beam fixed at the rim and subjected to tangential force at the hub 2. a simply supported beam fixed at hub and rim and carrying uniformly distributed load 3. a cantilever hub fixed at the rim and subjected to tangential force at the rim 4. a fixed beam fixed at hub and rim and carrying uniformly distributed load

Description : For finding out the bending moment for the arm (spoke) of flywheel the arm is assumed as 1. a cantilever beam fixed at the rim and subjected to tangential force at the hub 2. a simply ... tangential force at the rim 4. a fixed beam fixed at hub and rim and carrying uniformly distributed load

Last Answer : 3. a cantilever hub fixed at the rim and subjected to tangential force at the rim

For finding out the bending moment for the arm (spoke) of flywheel, the arm is assumed as, (A) A cantilever beam fixed at the rim and subjected to tangential force at the hub (B) A simply supported beam fixed at hub and rim and carrying uniformly distributed load (C) A cantilever beam fixed at the hub and subjected to tangential force at the rim (D) A fixed beam fixed at hub and rim and carrying uniformly distributed load

Description : For finding out the bending moment for the arm (spoke) of flywheel, the arm is assumed as, (A) A cantilever beam fixed at the rim and subjected to tangential force at the hub (B) A simply ... tangential force at the rim (D) A fixed beam fixed at hub and rim and carrying uniformly distributed load

Last Answer : (C) A cantilever beam fixed at the hub and subjected to tangential force at the rim

Two springs of stiffness k1 and k2 are connected in parallel, the combined stiffness of the connection is given by, (A) k1k2/k1 + k2 (B) k1k2/k1 - k2 (C) k1 + k2 (D) k1 + k2/k1k2

Description : Two springs of stiffness k1 and k2 are connected in parallel, the combined stiffness of the connection is given by, (A) k1k2/k1 + k2 (B) k1k2/k1 - k2 (C) k1 + k2 (D) k1 + k2/k1k2

Last Answer : (C) k1 + k2

Wahl factor to account for direct shear stress and stress concentration due to curvature for helical springs is given by, (A) (4C - 1/4C - 4) + 0.615/C (B) (4C - 1/4C + 4) + 0.615/C (C) (4C + 1/4C - 4) + 0.615/C (D) (4C + 1/4C + 4) + 0.615/C

Description : Wahl factor to account for direct shear stress and stress concentration due to curvature for helical springs is given by, (A) (4C - 1/4C - 4) + 0.615/C (B) (4C - 1/4C + 4) + 0.615/C (C) (4C + 1/4C - 4) + 0.615/C (D) (4C + 1/4C + 4) + 0.615/C

Last Answer : (A) (4C - 1/4C - 4) + 0.615/C

When two Belleville springs are in parallel, half force is obtained for a given deflection. a) Half force b) Double force c) Same force d) Can’t be determined

Description : When two Belleville springs are in parallel, half force is obtained for a given deflection. a) Half force b) Double force c) Same force d) Can’t be determined

Last Answer : b) Double force

Surge is a desirable effect in the sprigs. a) True b) False

Description : Surge is a desirable effect in the sprigs. a) True b) False

Last Answer : b) False

Surge is caused by resonance effect in the spring. a) True b) False

Description : Surge is caused by resonance effect in the spring. a) True b) False

Last Answer : a) True

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

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

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

Last Answer : (c) 689.7N and 4310.3N

The shock absorbing capacity of bolt can be increased by making the shank diameter ________ the root diameter. a) Lesser than b) Equal to c) Greater than d) No effect

Description : The shock absorbing capacity of bolt can be increased by making the shank diameter ________ the root diameter. a) Lesser than b) Equal to c) Greater than d) No effect

Last Answer : b) Equal to

In the expression of dynamic load capacity P=XVF r + YF a , Y stands for? (a) Race rotation factor (b) Radial load factor (c) Thrust load factor (d) Service factor

Description : In the expression of dynamic load capacity P=XVF r + YF a , Y stands for? (a) Race rotation factor (b) Radial load factor (c) Thrust load factor (d) Service factor

Last Answer : (c) Thrust load factor

In the expression of dynamic load capacity P=XVF r + YF a , X stands for? (a) Race rotation factor (b) Radial load factor (c) Thrust load factor (d) Service factor

Description : In the expression of dynamic load capacity P=XVF r + YF a , X stands for? (a) Race rotation factor (b) Radial load factor (c) Thrust load factor (d) Service factor

Last Answer : (b) Radial load factor

In the expression of dynamic load capacity P=XVF r + YF a , V stands for? (a) Race rotation factor (b) Radial load factor (c) Thrust load factor (d) Service factor

Description : In the expression of dynamic load capacity P=XVF r + YF a , V stands for? (a) Race rotation factor (b) Radial load factor (c) Thrust load factor (d) Service factor

Last Answer : (a) Race rotation factor

Stribeck equation gives the dynamic load capacity of the bearing. (a) True (b) False

Description : Stribeck equation gives the dynamic load capacity of the bearing. (a) True (b) False

Last Answer : (b) False

Stribeck equation gives the dynamic load capacity of the bearing. (a) True (b) False

Description : Stribeck equation gives the dynamic load capacity of the bearing. (a) True (b) False

Last Answer : (b) False

A total permanent deformation of 0.0001 of the ball diameter is taken for considering the static load capacity of the sh (a) True (b) False

Description : A total permanent deformation of 0.0001 of the ball diameter is taken for considering the static load capacity of the sh (a) True (b) False

Last Answer : (a) True

Cylindrical roller bearing has a lower load capacity as compared to deep groove ball bearing. (a) True (b) False

Description : Cylindrical roller bearing has a lower load capacity as compared to deep groove ball bearing. (a) True (b) False

Last Answer : (b) False

Which one of the following is correct? [IES-2008] A hydrodynamic slider bearing develops load bearing capacity mainly because of- (a) Slider velocity (b) wedge shaped oil film (c) Oil compressibility (d) oil viscosity

Description : Which one of the following is correct? [IES-2008] A hydrodynamic slider bearing develops load bearing capacity mainly because of- (a) Slider velocity (b) wedge shaped oil film (c) Oil compressibility (d) oil viscosity

Last Answer : (b) wedge shaped oil film

In the expression of dynamic load capacity P=XVF(r) + YF(a), V stands for ? a) Race rotation factor b) Radial factor c) Thrust factor d) None of the listed

Description : In the expression of dynamic load capacity P=XVF(r) + YF(a), V stands for ? a) Race rotation factor b) Radial factor c) Thrust factor d) None of the listed

Last Answer : a) Race rotation factor

Stribeck equation gives dynamic load capacity of the bearing. a) True b) False

Description : Stribeck equation gives dynamic load capacity of the bearing. a) True b) False

Last Answer : b) False

A total permanent deformation of 0.0001 of the ball diameter is taken for considering static load capacity of the shaft. a) True b) False

Description : A total permanent deformation of 0.0001 of the ball diameter is taken for considering static load capacity of the shaft. a) True b) False

Last Answer : a) True

Cylindrical load bearing has lower load capacity as compared to deep groove ball bearing. a) True b) False

Description : Cylindrical load bearing has lower load capacity as compared to deep groove ball bearing. a) True b) False

Last Answer : b) False

Cocentric springs are used in (A) Heavy duty diesel engines (B) aircraft engines (C) railroad suspensions (D) all of the above

Description : Cocentric springs are used in (A) Heavy duty diesel engines (B) aircraft engines (C) railroad suspensions (D) all of the above

Last Answer : (D) all of the above

Factor of safety in the design of springs is usually (A) 1.5 or less (B) 3 or less (C) 4.5 or less (D) 6 or less

Description : Factor of safety in the design of springs is usually (A) 1.5 or less (B) 3 or less (C) 4.5 or less (D) 6 or less

Last Answer : (A) 1.5 or less

For two springs in parallel, effective stiffness (k) is Where k 1 & k 2 are stiffness of springs 1 & 2 respectively (A) k 1 k 2 / (k 1 + k 2 ) (B) k 1 + k 2 (C) k 1 k 2 (D) (k 1 + k 2 ) / k 1 k 2

Description : For two springs in parallel, effective stiffness (k) is Where k 1 & k 2 are stiffness of springs 1 & 2 respectively (A) k 1 k 2 / (k 1 + k 2 ) (B) k 1 + k 2 (C) k 1 k 2 (D) (k 1 + k 2 ) / k 1 k 2

Last Answer : (B) k 1 + k 2

For two springs in series, effective stiffness (k) is Where k 1 & k 2 are stiffness of springs 1 & 2 respectively (A) k 1 k 2 / (k 1 + k 2 ) (B) k 1 + k 2 (C) k 1 k 2 (D) (k 1 + k 2 ) / k 1 k 2

Description : For two springs in series, effective stiffness (k) is Where k 1 & k 2 are stiffness of springs 1 & 2 respectively (A) k 1 k 2 / (k 1 + k 2 ) (B) k 1 + k 2 (C) k 1 k 2 (D) (k 1 + k 2 ) / k 1 k 2

Last Answer : (A) k 1 k 2 / (k 1 + k 2 )

Multi-leaf springs are used in (A) automobile suspension (B) railroad suspension (C) both (A) and (B) (D) none of the above

Description : Multi-leaf springs are used in (A) automobile suspension (B) railroad suspension (C) both (A) and (B) (D) none of the above

Last Answer : (C) both (A) and (B)

The leaves of multi-leaf springs are subjected to (A) bending stress (B) shear stress (C) axial stress (D) all of the above

Description : The leaves of multi-leaf springs are subjected to (A) bending stress (B) shear stress (C) axial stress (D) all of the above

Last Answer : (A) bending stress

In compression springs, the external force tends to (A) shorten the spring (B) lengthen the spring (C) both (A) and (C) (D) keep the length same

Description : In compression springs, the external force tends to (A) shorten the spring (B) lengthen the spring (C) both (A) and (C) (D) keep the length same

Last Answer : (A) shorten the spring

Two springs of stiffness k1 and k2 are connected in series, the combined (A) k1k2/k1 + k2 (B) k1k2/k1 - k2 (C) k1 + k2 (D) k1 + k2/k1k2

Description : Two springs of stiffness k1 and k2 are connected in series, the combined (A) k1k2/k1 + k2 (B) k1k2/k1 - k2 (C) k1 + k2 (D) k1 + k2/k1k2

Last Answer : (A) k1k2/k1 + k2

Springs are used, (A) To absorb shocks and vibrations (B) To store and release energy (C) To measure force (D) For any of the above functions

Description : Springs are used, (A) To absorb shocks and vibrations (B) To store and release energy (C) To measure force (D) For any of the above functions

Last Answer : (D) For any of the above functions

For two springs connected in parallel, net force is equal to the sum of force in each spring. a) True b) False

Description : For two springs connected in parallel, net force is equal to the sum of force in each spring. a) True b) False

Last Answer : a) True