Description : The shock absorbing capacity of a bolt can be increased by (A) Increasing shank diameter (B) Making shank diameter equal to core diameter of threads (C) Using castle nut in place of ordinary hexagonal nut (D) Using a washer
Last Answer : (B) Making shank diameter equal to core diameter of threads
Description : The shock absorbing capacity of bolts can be increased by a) Increasing the shank diameter b) Decreasing the length of shank portion of bolt c) Increase the shank diameter and decreasing the length of shank d) None of the listed
Last Answer : d) None of the listed
Description : The shock absorbing capacity of a bolt can be increased by (A) Increasing stress in shank (B) Increasing stress in core diameter of threads (C) Decreasing stress in shank (D) Decreasing stress in core diameter of threads
Last Answer : (A) Increasing stress in shank
Description : The shear plane in case of bolts should (a) be across threaded portion of shank (b) be parallel to axis of bolt (c) be normal to threaded portion of shank (d) never be across the threaded portion (e) none of the above.
Last Answer : (d) never be across the threaded portion
Description : Shank is the portion of bolt between the head and the thread. a) True b) False
Last Answer : a) True
Description : When a nut is tightened by placing a washer below it, the shank of bolt is subjected to (A) Direct shear stress (B) Torsional shear stress (C) Tensile stress (D) Compressive stress
Last Answer : (C) Tensile stress
Description : Resilience of a bolt can be increased by increasing its (A) Length (B) Shank diameter (C) Head diameter (D) None of these
Last Answer : (A) Length
Description : Coarse threads have helix angle _____ fine threads. a) Equal to b) Greater than c) Lesser than d) There is no relation
Last Answer : c) Lesser than
Description : Temperature rise in partial bearing is ____ than full bearing. a) Lesser b) Greater c) Equal
Last Answer : a) Lesser
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 : If core diameter of bolt is 13.8cm the it’s nominal diameter is given by? a) 17.27mm b) 15.34mm c) 14.67mm d) 16.34mm
Last Answer : a) 17.27mm
Description : If 8 bolts are emplaced in a clamp coupling with shaft diameter 80mm d, calculate the diameter of each bolt if coefficient of friction is 0.3 and torque transmitted is 4000N-m. Permissible tensile stress is 80N/mm2. a) 27mm b) 25mm c) 23mm d) 21mm
Last Answer : a) 27mm
Description : If 8 bolts are emplaced in a clamp coupling with shaft diameter 80mm d, calculate the tensile force on each bolt if coefficient of friction is 0.3 and torque transmitted is 4000N-m. a) 51234.4N b) 45968.3N c) 41666.7N d) None of the listed
Last Answer : c) 41666.7N
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 : In cold riveting like hot riveting shank is subjected to majorly tensile stress. a) True b) False
Last Answer : b) False
Description : If the length of the shank is doubled, then strain energy absorbed by shank a) Doubles b) Remains same c) Increases 4 time d) Become half
Last Answer : a) Doubles
Description : When the shear strength of nut is equal to the tensile strength of bolt, the height of nut (h) should be (A) h = 0.5 dc (B) h = 0.25 dc (C) h = 0.75 dc (D) h = dc
Last Answer : (A) h = 0.5 dc
Description : The shaft is always stepped with ________ diameter at the middle portion and __________ diameter at the shaft ends. a) Minimum, maximum b) Maximum, minimum c) Minimum, minimum d) Zero, infinity
Last Answer : b) Maximum, minimum
Description : Which of the following is not a function of washer? a) Distributes load over a large area of clamped parts b) Provides bearing surface over large clearance bolts c) Prevents marring of the bolt head and nut surface d) Helps in locking of the fastener
Last Answer : d) Helps in locking of the fastener
Description : In nut and bolt fastener, nut is generally held stationary while bolt is rotated. a) True b) False
Description : If a fastener is threaded into a tapped hole, then the fastener is likely to be called as a) Screw b) Bolt c) Washer d) Screw or bolt
Last Answer : a) Screw
Description : Which type of screw fasteners are threaded through out its length? a. Cap screws b. Set screws c. Studs d. Tap bolt
Last Answer : b. Set screws
Description : Jam nut is a locking device in which (A) A smaller nut is tightened against main nut creating friction at the contacting surface (B) A split pin is passed through diametrically opposite slots in nut and ... parts of nut separated by slot (D) An elastic piece is tightened in the nut by a setscrew
Last Answer : (A) A smaller nut is tightened against main nut creating friction at the contacting surface
Description : When a nut is tightened by placing a washer below it, the threads of bolt are subjected to (A) Direct shear stress (B) Torsional shear stress (C) Tensile stress (D) Compressive stress
Last Answer : (A) Direct shear stress
Description : When the shear strength of nut is half the tensile strength of bolt, the height of nut (h) should be (A) h = 0.5 dc (B) h = 0.25 dc (C) h = 0.75 dc (D) h = dc
Last Answer : (B) h = 0.25 dc
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 : Castle nut is a locking device in which (A) A smaller nut is tightened against main nut creating friction at the contacting surface (B) A split pin is passed through diametrically opposite slots in nut and ... of nut separated by slot (D) An elastic piece is tightened in the nut by a setscrew
Last Answer : (B) A split pin is passed through diametrically opposite slots in nut and a hole in bolt and the two ends of split pin are separated and bent back on nut
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
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 : A cylinder roller creates lesser noise than a deep groove ball bearing. (a) True (b) False
Last Answer : (b) False
Description : Cylinder roller creates lesser noise than deep groove ball bearing. a) True b) False
Description : The static load carrying capacity of fine threads is greater than that of coarse threads. a) True b) False
Description : Does ASME Standard take into consideration shock and fatigue factors? a) Yes b) No
Last Answer : a) Yes
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
Description : 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
Last Answer : (D) Any of the above objectives
Description : The inner diameter of washer is (A) Equal to the nut size (B) More than the nut size (C) Less than the nut size (D) Independent of the nut size
Last Answer : (B) More than the nut size
Description : Which of the following function can the spring perform? a) Store energy b) Absorb shock c) Measure force d) All of the mentioned
Last Answer : d) All of the mentioned
Description : Higher the number of stars, ________ will be the efficiency or EER a) Lesser c) Greater b) Likewise e) average
Last Answer : Greater
Description : The maximum tangential stress σ t = (σ x sin 2θ)/2 is maximum if, θ is equal to ________ a. 45 o b. 90 o c. 270 o d. all of the above
Last Answer : a. 45 o
Description : Flywheel absorbs energy during those periods of crank rotation when 1. The twisting moment is greater than the resisting moment 2. The twisting moment is equal to the resisting moment 3. The twisting moment is less than resisting moment 4. The load on engine falls
Last Answer : 1. The twisting moment is greater than the resisting moment
Description : Which of the following statement(s) is/are true concerning the neuroendocrine responses to shock? a. Sympathetic nerve endings release epinephrine which is responsible for greater than 80% ... injury and sepsis d. The renin-angiotensin axis further augments the sympathetic-mediated vasoconstriction
Last Answer : Answer: c, d The neuroendocrine response to shock attempts to achieve restoration of effective blood volume, mobilization of metabolic substrates, and maintenance of central ... . Angiotensin II is an extremely effective vasoconstrictor that further augments sympathetic-mediated vasoconstriction
Description : The strength of a welded joint with respect to a riveted joint is a. Greater b. Smaller c. Equal d. None
Last Answer : a. Greater
Description : Efficiency of a welded joint with respect to a riveted joint is a. Smaller b. Equal c. Greater
Last Answer : c. Greater
Description : Which threads have greater resistance to unscrewing? a) Coarse b) Fine c) They have equal resistance d) Cannot be determined
Last Answer : b) Fine
Description : Pick out the wrong statement. (A) Cumulative analysis for determining surface area is preferred over differential analysis, because of the assumption that "all particles in a simple fraction equal in size" is ... throwing of the balls through the air to the toe of the heap is called 'cataracting'
Last Answer : (C) Capacity of crusher in choke feeding is increased
Description : Torricelli's theorem states that the velocity ‘v’ of the liquid emerging from the bottom of the wide tank is given by √(2gh). In practice, this velocity is: A. equal to √(2gh) B. greater than √(2gh) C. lesser than √(2gh) D. independent of height and gravitational field strength
Last Answer : lesser than √(2gh
Description : Kinetic friction is always A. lesser than static friction B. greater than static friction C. equal to static friction D. equal to contact force
Last Answer : lesser than static friction
Description : With internationalization, after a point, the costs of organization complexity may be.........the benefits of internationlization? A. Equal B. Lesser than C. Greater than D. Not comparable to
Last Answer : Greater than