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 : 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 : 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 : In nut and bolt fastener, nut is generally held stationary while bolt is rotated. a) True b) False
Last Answer : b) False
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 : The maximum efficiency of a square threaded screw is (A) (1 - sinφ)/ (1 + sinφ) (B) (1 + sinφ)/ (1 - sinφ)s (C) (1 - sinφ)/ (1 + cosφ) (D) (1 + cosφ)/ (1 - sinφ)
Last Answer : (A) (1 - sinφ)/ (1 + sinφ)
Description : Which of the following fastening devices has its both ends threaded? (A) Bolt (B) Stud (C) Set screw (D) Split nut
Last Answer : (B) Stud
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 : 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 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 : The most important function of a washer is to provide bearing area and washers are normally specified by their hole diameters. The diameter of washer as compared to the nut is (A) More (B) Less (C) Same (D) More but less than the diameter of bolt
Last Answer : (A) More
Description : Which type of joints is better when the product is subjected to large vibrations: welded or threaded? a) Welded b) Threaded c) Both have same results d) Depends on the magnitude of the vibrational force
Last Answer : a) Welded
Description : Threaded joints are non-separable joints. a) True b) False
Description : Maximum efficiency of a square threaded is given by a) 1-sinǾ/1+sinǾ b) 1+sinǾ/1-sinǾ c) 1-2sinǾ/1+2sinǾ d) 1+2sinǾ/1-2sinǾ
Last Answer : a) 1-sinǾ/1+sinǾ
Description : Screw jack can be adjusted no more than? a. 300mm (12 inches) of threaded length showing b. 2/3 of the total threaded length showing c. 150mm (6 inches) of threaded length showing d. 1/3 of the total threaded length showing
Last Answer : b. 2/3 of the total threaded length showing
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 : 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 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
Description : Shank is the portion of bolt between the head and the thread. a) True b) False
Last Answer : a) True
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 : 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 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 : 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 : 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 largest diameter of external or internal screw thread is called (A) Major diameter (B) Minor diameter (C) Pitch diameter (D) None of the above
Last Answer : (A) Major diameter
Description : A washer is specified by (A) Outer diameter (B) Inner diameter (C) Thickness (D) Mean diameter
Last Answer : (B) Inner diameter
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 : If the lateral force acting on the set screw is large and tends to displace one part with respect to other than which point is recommended? a) Dog Point b) Cone Point c) Window Point d) Cut Point
Last Answer : a) Dog Point
Description : Maximum possible efficiency of a self-locking screw is a) 50% b) 75% c) 66% d) 33%
Last Answer : a) 50%
Description : Efficiency of the screw _______ with increase of coefficient of friction. a) decreases b) increases c) has no effect d) cannot be determined
Last Answer : a) decreases
Description : Efficiency of the screw depends upon helix angle but does not depend on friction angle. a) True b) False
Description : Efficiency of screw depends upon lead of the screw. a) True b) False
Description : Nominal diameter of the screw thread is the same as core diameter. a) True b) False
Description : Threads used in screw fasteners are ______ a. having high strength b. having low efficiency c. single start type d. all of the above
Last Answer : d. all of the above
Description : Allen key is used to tighten (A) Cap screw with hexagonal head (B) Cap screw with fillister head (C) Cap screw with hexagonal socket head (D) Cap screw with flat head
Last Answer : (C) Cap screw with hexagonal socket head
Description : A screw is specified by (A) Major diameter (B) Minor diameter (C) Pitch diameter (D) Mean diameter
Description : Setscrews are (A) Similar to tap bolts except that a greater variety of shapes of heads are available (B) Slotted for screw driver and generally used with a nut (C) Used to prevent relative motion between parts (D) Similar to studs
Last Answer : (C) Used to prevent relative motion between parts
Description : While designing screw threads, adequate length of engaged threads between the screw and nut is provided so as to prevent failure of threads due to (A) Direct shear stress (B) Torsional shear stress (C) Tensile stress (D) Compressive stress
Description : In manual assembly, cost of screw is higher than the cost of driving a screw. a) True b) False
Description : The bolt is subjected to __________ when the nut is tightened by putting the washer beneath it. (A) Tension (B) Shear (C) Compression (D) Bending & tension
Last Answer : Option A
Description : If a flat plate with a circular hole is subjected to tensile force, then its theoretical stress concentration factor is? a) 2 b) 3 c) 4 d) 1
Last Answer : b) 3
Description : For an elliptical hole on a flat plate, if width of the hole in direction of the load decrease, Stress Concentration Factor will______ a) Increase b) Decrease c) Remains constant d) Can’t be determined. Varies from material to material
Last Answer : a) Increase
Description : According to Indian standard specifications, 100 H6/g5 means that (A) Tolerance grade for the hole is 6 and for the shaft is 5 (B) Tolerance grade for the shaft is 6 and for the hole is 5 (C) Tolerance grade for ... is 3 to 7 (D) Tolerance grade for the hole is 4 to 8 and for the shaft is 3 to 7
Last Answer : (A) Tolerance grade for the hole is 6 and for the shaft is 5
Description : How can I shorten the straps on a dress with some sort of fastener or minimal sewing?
Last Answer : Try sewing a button and button hole, you can always go back later and change it if you don’t like the fit.
Description : Is a brass paper fastener an insulator or conductor?
Last Answer : conductor
Description : Is a velcro fastener a solid structure?
Last Answer : Yes, the hook and loop structure of a velcro fastener is a solid structure.
Description : A door fastener?
Last Answer : I do not no and guys pls tell meh pls pls pls