Description : The resultant axial force on bolt depends upon (A) Initial tension (B) External applied load (C) Stiffness of bolt and parts held by bolt (D) All three factors
Last Answer : (D) All three factors
Description : A spring of stiffness constant k is cut in two equal parts. The stiffness constant of new spring will be k/2. a) True b) False
Last Answer : b) False
Description : Cold riveting holds the connected parts better than hot riveting. a) True b) False
Description : A clearance bearing is design accurately to keep the radius of journal and bearing equal. a) Journal radius is kept larger b) Journal radius is kept smaller c) True d) Can’t be determined
Last Answer : b) Journal radius is kept smaller
Description : Torsional shear stresses are induced in the spring wire when (A) spring is under compression (B) spring is under tension (C) both (A) and (B) (D) none of the above
Last Answer : (C) both (A) and (B)
Description : Welded structures with respect to riveted joint is a. Weakened in tension b. Strengthened in tension c. No change in tension strength d. None
Last Answer : c. No change in tension strength
Description : Area under tension in a single transverse fillet lap weld is (i)0.707 tl (ii) 0.807 tl (iii) 400 tl (iv)None
Last Answer : (i)0.707 tl
Description : Internal defects in a welded joint can be found by a process called (i) Tension test (ii) Visual inspection (iii) Radio graphing (iv) None
Last Answer : (iii) Radio graphing
Description : Standard coarse threads are equally strong in failure by shear and failure by tension, if the height of nut is (A) h = 0.4 d (B) h = 0.6 d (C) h = 0.5 d (D) h = d
Last Answer : (A) h = 0.4 d
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
Description : Under complex loading, if elastic limit reaches in tension, then failure occurs due to (a) Firstly Maximum principal strain theory (b) Secondly Maximum principal theory of strain energy (c) Thirdly Maximum Principal stress theory (d) None
Last Answer : (c) Thirdly Maximum Principal stress theory
Description : Under complex loading, if elastic limit reaches in tension, then failure occurs due to (a) Firstly Maximum principal strain theory (b) Secondly Maximum principal theory of strain energy (c) Thirdly Maximum shear stress theory (d) None
Last Answer : (d) None
Description : Under maximum shear stress theory, maximum shear stress is equal to (a) Allowable stress in tension (b) Allowable stress in compression (c) Allowable stress in shear (d) None
Last Answer : (c) Allowable stress in shear
Description : Under maximum principal stress theory, maximum principal stress is equal to (a) Allowable stress in tension (b) Allowable stress in compression (c) Allowable stress in shear (d) None
Last Answer : (a) Allowable stress in tension
Description : The objective of caulking in a riveted joint is to make the joint (A) Free from corrosion (B) Stronger in tension (C) Free from stress (D) Leak-proof
Last Answer : (D) Leak-proof
Description : Keyed joints never lead to stress concentration on shafts. a) True b) False
Description : Feather key can be used to prevent axial motion between two elements. a) True b) False
Description : The operation of flywheel is continuous. a) True b) False
Last Answer : a) True
Description : Flywheel and governor can be interchanged. a) True b) False
Description : Flywheels are used in punching and shear operation. a) True b) False
Description : Is use of a flywheel recommended when a large motor is required only for a small instant of time? 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
Description : For the majority of bearings, actual life is considerably greater than rated life. (a) True (b) False
Last Answer : (a) True
Description : The life of an individual ball bearing is the time period for which it works without any signs of failures. (a) True (b) False
Description : Stribeck equation gives the dynamic load capacity of the bearing. (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
Description : Needles bearing consist of rollers of small diameter and very small length. (a) True (b) False
Description : A cylinder roller creates lesser noise than a deep groove ball bearing. (a) True (b) False
Description : Angular contact bearing can take thrust as well as radial loads. (a) True (b) False
Description : Cylindrical roller bearing has a lower load capacity as compared to deep groove ball bearing. (a) True (b) False
Description : Assertion (A): Hydrostatic lubrication is more advantageous when compared to hydrodynamic lubrication during starting and stopping the journal in its bearing. Reason (R): In hydrodynamic lubrication, the fluid film pressure is ... (c) A is true but R is false (d) A is false but R is true
Last Answer : (b) Both A and R are individually true but R is not the correct explanation of A
Description : Assertion (A): In hydrodynamic journal bearings, the rotating journal is held in floating condition by the hydrodynamic pressure developed in the lubricant. Reason (R): Lubricant flows in a converging-diverging channel. [IES-1994] ... A (c) A is true but R is false (d) A is false but R is true
Last Answer : (a) Both A and R are individually true and R is the correct explanation of A
Description : Assertion (A): Oil as a cutting fluid result in a lower coefficient of friction. Reason (R): Oil forms a thin liquid film between the tool face and chip, and it provides 'hydrodynamic lubrication'. [IES- 2000] (a ... explanation of A (c) A is true but R is false (d) A is false but R is true
Last Answer : (c) A is true but R is false
Description : Assertion (A): In anti-friction bearings, the frictional resistance is very low as the shaft held by it remains in floating condition by the hydrodynamic pressure developed by the lubricant. [IES-2006] Reason (R): In hydrodynamic ... of A (c) A is true but R is false (d) A is false but R is true
Last Answer : (d) A is false but R is true
Description : Assertion (A): In equilibrium position, the journal inside a journal bearing remains floating on the oil film. [IES-1995] Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the ... explanation of A (c) A is true but R is false (d) A is false but R is true
Description : Assertion (A): In steady rotating condition the journal inside a hydrodynamic journal bearing remains floating on the oil film. [IES-2008] Reason (R): The hydrodynamic pressure developed in steady rotating conditions in journal ... A (c) A is true but R is false (d) A is false but R is true
Last Answer : (a) Both A and R are true and R is the correct explanation of A
Description : Transverse fillet weld can be designed using the same equations as of parallel fillet weld. a) True b) False
Description : A single transverse weld is preferred over double transverse fillet weld. a) True b) False
Description : If fluid film pressure is high and surface rigidity is low than mode of lubrication is called as elastohydrodynamic lubrication. a) True b) False
Description : Hydrostatic and hydrodynamic lubrication are the same thing. a) True b) False
Description : Hydrodynamic bearing is a self-acting bearing. a) True b) False
Description : Needles bearing consist of rollers of small diameter and very small length. 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
Description : For majority of bearings, actual life is considerably greater than rated life. a) True b) False
Description : The life of an individual ball bearing is the time period for which it works without any signs of failures. a) True b) False
Description : Stribeck equation gives dynamic load capacity of the bearing. 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
Description : Cylinder roller creates lesser noise than deep groove ball bearing. a) True b) False
Description : Angular contact bearing can take thrust as well as radial loads. a) True b) False