Description : Among casting, forging and forging which has the slowest rate of production? a) Casting b) Forging c) Machining d) All have equal rate of production
Last Answer : c) Machining
Description : A jet engine turbine blade is normally manufactured by (A) Forging (B) Shell moulding (C) Investment casting (D) Pressure die casting
Last Answer : (C) Investment casting
Description : Normalising of a casting does not (A) Induce stresses in it (B) Refine its grain structure (C) Reduce segregation (D) Improve its mechanical properties
Last Answer : (A) Induce stresses in it
Description : In forging, metal is in which of the following stage? a) Elastic b) Plastic c) Can be in any stage d) Rigid
Last Answer : b) Plastic
Description : While designing a forging, the profile is selected such that the fibrous lines are parallel to the tensile forces and perpendicular to shear forces. a) True b) False
Last Answer : a) True
Description : Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by __________ have residual stresses. (A) Forging (B) Cold rolling (C) Hot rolling (D) Casting
Last Answer : (B) Cold rolling
Description : Wrought iron is never shaped by (A) Casting (B) Cold working (C) Forging (D) Welding
Last Answer : (A) Casting
Description : Which of the following factors affect the mechanical properties of a material under applied loads? a) Content of alloys b) Grain size c) Imperfection and defects d) Shape of material
Last Answer : d) Shape of material
Description : In drop forging process, the forging is done by dropping the __________ at high velocity. (A) Hammer (B) Workpiece (C) Die with hammer (D) Weight on hammer
Last Answer : (C) Die with hammer
Description : (i) Compare Open Die Forging and Close Die Forging. (ii) Explain with neat sketch process of Drop Forging.
Last Answer : (i) Difference between Open Die and Close Die Forging: (ii)Drop Forging Drop forging is carried out by using drop hammers. They are board or gravity hammer, air lift hammer and power drop ... of upper and lower dies. The ram is fastened to the lower end of vertical hard wood board.
Description : Explain hot chamber die casting process with neat sketch.
Last Answer : Hot chamber die casting : In a hot chamber submerged plunger-type machine, the plunger operates in one end of a gooseneck casting which is submerged in the molten metal. With the plunger in ... . Heating is continued throughout the operation to keep the molten metal sufficiently liquid.
Description : Mild steel is used for making (A) Fish plates (B) Die block (C) Channels (D) Drop forging
Last Answer : (C) Channels
Description : Explain closed die forging with neat sketch
Last Answer : Impression die & Closed die forging process: Closed Die forging is also known as impression die forging. Close die forging process consist of specially prepared dies to manufacturing forged parts in large ... of accuracy. Complex shaped parts can be easily forged by this forging process.
Description : Differentiate between open die forging and close die forging.
Last Answer : Difference between open die and close die forging:
Description : Classify closed die forging. Explain any one with neat sketch.
Last Answer : Classification of closed / Impression die forging:- 1) drop forging 2) press forging 3) machine forging 4) Single die 5) Multi die close die forging :- Close die forging is also called as ... the first forging is made. after forging operation the part must be trimmed to remove the flash.
Description : If load on the engine is constant, the mean speed will be constant and ___ will not operate. a) Flywheel b) Governor c) Both flywheel and governor d) None of the mentioned
Last Answer : b) Governor
Description : The purpose of lubrication in an antifriction bearing is (a) to reduce the friction between balls and races (b) dissipation of frictional heat prevention of corrosion (c) protection of the bearing from dirt and other foreign particles (d) all of the mentioned
Last Answer : (d) all of the mentioned
Description : Which of the following elements is not used as a roller in roller bearings? (a) Cylindrical (b) Taper (c) Spherical (d) None of the mentioned
Last Answer : (d) None of the mentioned
Description : What type of bearing will you recommend for use in the conveyor belt roller? (a) Ball-bearing (b) Roller bearing (c) Magnetic bearing (d) None of the mentioned
Last Answer : (b) Roller bearing
Description : The construction feature which makes tapered roller bearings unique in that races are (a) attachable (b) separable (c) self-aligning (d) none of the mentioned
Last Answer : (b) separable
Description : Which of the following bearings carry thrust load in one direction? (a) Spherical roller thrust bearings (b) Taper roller bearings (c) Spherical roller thrust bearings and taper roller bearings (d) none of the mentioned
Last Answer : (c) Spherical roller thrust bearings and taper roller bearings
Description : Deep groove ball bearings create a lot of noise. (a) Yes (b) Depends on the application (c) They create very less noise (d) No reference frame for comparison is mentioned
Last Answer : (c) They create very less noise
Description : Antifriction bearings are (a) sleeve bearings (b) hydrodynamic bearings (c) thin lubricated bearings (d) none of the mentioned
Last Answer : (d) none of the mentioned
Description : The listed life of a rolling bearing, in a catalog is the, (a) minimum expected life (b) maximum expected life (c) average life (d) none of the mentioned
Last Answer : (a) minimum expected life
Description : The tapered roller bearings can take (a) radial load only (b) axial load only (c) both radial and axial loads (d) none of the mentioned
Last Answer : (c) both radial and axial loads
Description : The antifriction bearings (a) have low starting and low running friction at moderate speeds (b) have a high initial cost (c) can carry both radial and thrust loads (d) all the mentioned
Last Answer : (d) all the mentioned
Description : The rolling contact bearings as compared to sliding contact bearings have (a) small overall dimensions (b) accuracy of shaft alignment (c) low starting and low running friction except at very high speeds (d) all the mentioned
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 : Extreme pressure causes ______ wear in the bearing parts. a) Abrasive b) Corrosive c) Pitting d) All of the mentioned
Last Answer : b) Corrosive
Description : Taper rolling supports a) Axial loads b) Thrust loads c) Both axial and thrust loads d) None of the mentioned
Last Answer : c) Both axial and thrust loads
Description : Deep groove ball bearings creates a lot of noise. a) Yes b) They create very less noise c) Depends on the application d) No reference frame for comparison is mentioned
Last Answer : b) They create very less noise
Description : Modulus of resilience is defined as a) Strain energy per unit volume b) Strain energy per unit area c) Independent of strain energy d) None of the mentioned
Last Answer : a) Strain energy per unit volume
Description : Which of the following facts are true for resilience? a) Ability of material to absorb energy when deformed elastically b) Ability to retain deformation under the application of load or after removal ... c) Ability of material to absorb energy when deformed plastically d) None of the mentioned
Last Answer : a) Ability of material to absorb energy when deformed elastically
Description : Which of the following are true about plasticity? a) Permanent Deformation b) Ability to retain deformation under load or after removal of load c) Plastic deformation is greater than elastic deformation d) All of the mentioned
Last Answer : d) All of the mentioned
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 : If uncompressed length of spring is 40mm and number of coils 10mm, then pitch of coil is? a) 4 b) 40/9 c) 40/11 d) None of the mentioned
Last Answer : b) 40/9
Description : If the spring is compressed completely and the adjacent coils touch each other,the the length of spring is called as? a) Solid length b) Compressed length c) Free length d) None of the mentioned
Last Answer : a) Solid length
Description : Which of the following function can the spring perform? a) Store energy b) Absorb shock c) Measure force d) All of the mentioned
Description : In gas welding which of the following is generally used? a) Oxygen-Hydrogen b) Oxygen-Acetylene c) Oxygen-Hydrogen or Oxygen-Acetylene d) None of the mentioned
Last Answer : c) Oxygen-Hydrogen or Oxygen-Acetylene
Description : Which of the following are important parts of knuckle joint? a) Eye b) Pin c) Fork d) Each of the mentioned
Last Answer : d) Each of the mentioned
Description : Cotter joint is used when the members are subjected to which type of stresses? a) Axial tensile b) Axial compressive c) Axial tensile or compressive d) None of the mentioned
Last Answer : c) Axial tensile or compressive
Description : If there is no place to accommodate the nut, then one would choose the a) Through Bolts b) Tap Bolts c) Studs d) None of the mentioned
Last Answer : b) Tap Bolts
Description : Self-locking takes place when a) Coefficient of friction is equal to or greater than the tangent of the helix angle b) Coefficient of friction is lesser than or equal to the tangent of the helix ... friction is equal to or greater than the tangent of the helix angle d) None of the mentioned
Last Answer : c) Coefficient of friction is equal to or greater than the tangent of the helix angle
Description : While designing shaft on the basis of torsional rigidity, angle of twist is given by? a) Ml/Gd4 b) 584Ml/Gd4 c) 292 Ml/Gd4 d) None of the mentioned
Last Answer : b) 584Ml/Gd4
Description : Which of the following act on shafts? a) Torsional moment b) Bending Moment c) Both torsional and bending d) None of the mentioned
Last Answer : c) Both torsional and bending
Description : The stress represented by sin (t) + 4 belongs to which category? a) Alternating Stresses b) None of the mentioned c) Repeated Stresses d) Reversed Stresses
Last Answer : a) Alternating Stresses
Description : The stress represented by sin (t) + 2 belongs to which category? a) Fluctuating Stresses b) None of the mentioned c) Repeated Stresses d) Reversed Stresses
Last Answer : a) Fluctuating Stresses
Description : The phenomenon of decreased resistance of the materials to fluctuating stresses is the main characteristic of _____ failure. a) Fracture b) Fatigue c) Yielding d) None of the mentioned
Last Answer : b) Fatigue