Description : A fillet weld is an approximately triangular cross section joining two surfaces lying parallels to each other. a) True b) False
Last Answer : b) False
Description : Which of the following are included in the finishing operations for porous bearing? [IES-2005] 1. Infiltration 2.Sizing 3.Heat treatment 4.Coining Select the using the code given below: (a) 1 and 2 (b) 2 and 3 (c) 2 and 4 (d) 1 and 4
Last Answer : (a) 1 and 2
Description : A weld symbol is necessary because of (i) Aesthetic sense (ii) Finishing (iii) Manufacturing (iv) None
Last Answer : (iii) Manufacturing
Description : A thick film bearing is a bearing (A) Where the surfaces of journal and the bearing are completely separated by a film of lubricant (B) Where the surfaces of journal and the bearing are partially ... are separated by a film created by elastic deflection of parts (D) Where there is no lubricant
Last Answer : (A) Where the surfaces of journal and the bearing are completely separated by a film of lubricant
Description : For elasto-hydrodynamic lubrication (A) There should be relative motion between the surfaces of the journal and the bearing and wedge shaped clearance space (B) There should be external source like ... be elastic deformation of the parts in contact (D) There should be metal to metal contact
Last Answer : (C) There should be elastic deformation of the parts in contact
Description : For hydrostatic lubrication (A) There should be relative motion between the surfaces of the journal and the bearing and wedge shaped clearance space (B) There should be external source like pump to ... be elastic deformation of the parts in contact (D) There should be metal to metal contact
Last Answer : (B) There should be external source like pump to supply lubricant under pressure
Description : For hydrodynamic lubrication (A) There should be relative motion between the surfaces of the journal and the bearing and wedge shaped clearance space (B) There should be external source like pump to ... be elastic deformation of the parts in contact (D) There should be metal to metal contact
Last Answer : (A) There should be relative motion between the surfaces of the journal and the bearing and wedge shaped clearance space
Description : A thin film bearing is a bearing (A) Where the surfaces of journal and the bearing are completely separated by a film of lubricant (B) Where the surfaces of journal and the bearing are partially ... are separated by a film created by elastic deflection of parts (D) Where there is no lubricant
Last Answer : (B) Where the surfaces of journal and the bearing are partially separated by a film of lubricant and there is partial metal to metal contact
Description : A zero film bearing is a bearing (A) Where the surfaces of journal and the bearing are separated by a thick film of lubricant (B) Where the surfaces of journal and the bearing are partially ... bearing are separated by a film created by elastic deflection of parts (D) Where there is no lubricant
Last Answer : (D) Where there is no lubricant
Description : Thick film lubrication describes a phenomenon where two surfaces are _______ separated. a) Completely b) Partially c) Not d) None of the mentioned
Last Answer : a) Completely
Description : What type of wear occurs due to an interaction of surfaces due to adhesion of the metals? a) Adhesive wear b) Abrasive wear c) Fretting wear d) Erosive wear
Last Answer : a) Adhesive wear
Description : Which of the following is (are) true? (A) Cast iron has poor tensile strength compared to steel (B) Failure of cast iron flywheel is sudden and total (C) Machinability of cast iron flywheel is poor compared to steel flywheel (D) All of the above
Last Answer : (D) All of the above
Description : Which of the following is not true for cast iron flywheels? a) Excellent damping b) Cheap c) Given complex shape d) Sudden failure
Last Answer : d) Sudden failure
Description : A flywheel is made of 1. cast iron 2. high strength steels 3. graphic fiber reinforced polymer 4. any one of the above materials
Last Answer : 4. any one of the above materials
Description : Flywheel are generally made from (A) Cast Iron (B) High strength steel (C) Ceramics (D) All of the above
Description : The knuckle joint is made up of... A. Cast iron B. stainless Steel C. Teflon D. All of the above
Last Answer : D. All of the above
Description : Maximum shear stress theory is used for (A) Cast iron shafts (B) Steel shafts (C) Flexible shafts (D) Plastic shafts
Last Answer : (B) Steel shafts
Description : Maximum principle stress theory is used for (A) Cast iron shafts (B) Steel shafts (C) Aluminum shafts (D) Plastic shafts
Last Answer : (A) Cast iron shafts
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