Description : A tube is specified by its (A) Thickness only (B) Outer diameter only (C) Thickness & outer diameter both (D) Inner diameter
Last Answer : (C) Thickness & outer diameter both
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 : Nominal Pipe Size (NPS) of a pipe less than 12 inches in diameter indicates its (A) Inner diameter (B) Outer diameter (C) Thickness (D) Neither inner nor outer diameter
Last Answer : (D) Neither inner nor outer diameter
Description : Lower BWG means __________ of the tube. (A) Lower thickness (B) Lower cross-section (C) Outer diameter (D) Inner diameter
Last Answer : (B) Lower cross-section
Description : Which one of the following parts of a ball bearing acts as a barrier between the balls preventing them from bumping into each other? (a) Inner race (b) Outer race (c) Rolling element (d) Cage
Last Answer : (d) Cage
Description : Which one of the following parts of a ball bearing is mounted to the housing and is stationary? (a) Inner race (b) Outer race (c) Rolling element (d) Cage
Last Answer : (b) Outer race
Description : Which one of the following parts of a ball bearing is mounted on the rotating shafts and tends to rotate the shaft? (a) Inner race (b) Outer race (c) Rolling element (d) Cage
Last Answer : (a) Inner race
Description : The maximum shear stress in spring wire is induced at (A) Inner surface of the coil (B) Outer surface of the coil (C) Central surface of the coil (D) End coils
Last Answer : (A) Inner surface of the coil
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 : A screw is specified by (A) Major diameter (B) Minor diameter (C) Pitch diameter (D) Mean diameter
Last Answer : (A) Major diameter
Description : A rolling contact bearing is specified as X307. Calculate the bearing diameter. (a) 35 mm (b) 28 mm (c) 21 mm (d) 7 mm
Last Answer : (a) 35 mm
Description : Find the shear stress in a flange at the junction of hub in rigid flanged coupling if torsional moment is 2980N-m and diameter of hub being 125mm. Also the thickness of flange is 25mm. a) 6.77N/mm2 b) 10.24N/mm2 c) 4.84N/mm2 d) 4.22N/mm2
Last Answer : c) 4.84N/mm2
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 : In a thick cylindrical shell subjected to an internal pressure (p), the radial stress across the thickness of a cylinder is a) maximum at the outer surface and minimum at the inner surface b) maximum ... and zero at the outer surface d) maximum at the outer surface and zero at the inner surface
Last Answer : c) maximum at the inner surface and zero at the outer surface
Description : In a thick-cylinder pressurized from inside, the hoop stress is maximum at a) The center of the wall thickness b) the outer radius c) the inner radius d) both the inner and the outer radii
Last Answer : c) the inner radius
Description : A vessel is said to be thin if a. Its wall has less thickness b. Stresses are uniform over the entire thickness c. Stresses vary at inner and at outer radius d. None of the above
Last Answer : b. Stresses are uniform over the entire thickness
Description : A hollow prismatic beam of circular section is subjected to a torsional moment. The maximum shear stress occurs at (a) inner wall of cross section (b) middle of thickness (c) outer surface of shaft (d) none of these
Last Answer : (c) outer surface of shaft
Description : Maximum shear stress in a hollow shaft subjected to a torsional moment is at the a. Middle of thickness. b. At the inner surface of the shaft. c. At the outer surface of the shaft. d. At the middle surface of the shaft.
Last Answer : c. At the outer surface of the shaft.
Description : Size of boiler tubes is specified by a) Mean diameter and thickness b) Inside diameter and thickness c) Outside diameter and thickness d) Outside diameter and inside diameter
Last Answer : c) Outside diameter and thickness
Description : For specified tube outside diameter, higher BWG means higher (A) Tube thickness (B) Cross-sectional area (C) Weight per unit length (D) None of these
Last Answer : (B) Cross-sectional area
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 : 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 : 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 : A metal pipe is 77 cm long. The inner diameter of a cross section is 4 cm, the outer diameter being 4.4cm. -Maths 9th
Last Answer : Let r1 and r2 Inner and outer radii of cylindrical pipe r1 = 4/2 cm = 2 cm r2 = 4.4/2 cm = 2.2 cm Height of cylindrical pipe, h = length of cylindrical pipe = 77 cm (i) curved surface ... CSA of roller = (500 31680) cm2 = 15840000 cm2 = 1584 m2. Therefore, area of playground is 1584 m2. Answer!
Description : Large diameter sewers subjected to external pressure alone, are reinforced A. Near the inner surface of the pipe B. Near the outer surface of the pipe C. Both A. and B. D. With elliptical cage
Last Answer : ANS: D
Description : Nominal size of a pipe is an indication of its __________ diameter. (A) Inner (B) Outer (C) Approximate (D) None of these
Last Answer : (C) Approximate
Description : If the strain energy stored per unit volume in a hollow shaft subjected to a pure torque when t attains maximum shear stress fs the ratio of inner diameter to outer diameter, is 17/64 (fs/N) (A) 1/2 (B) 1/3 (C) 1/4 (D) 1/5
Last Answer : (C) 1/4
Description : How To Calculate Bearing Number Ti Diameter Of The Inner And Outer?
Last Answer : Divide the shaft diameter size by 5, it will give last two digit of the bearing no. and according to type of load we have to choose the type of bearing and that will give prior number of the bearing.
Description : A hollow shaft has an inner diameter of 3.7 cm and an outer diameter of 4.0 cm. A 1 kN-m torque is applied to this shaft. What is the shear stress at the mid-radius of this shaft? (a) 117Mpa (b) 178 Mpa (c) 286 Mpa (d) 363 Mpa
Last Answer : (c) 286 Mpa
Description : A hollow shaft of 1 m length is designed to transmit a power of 30 kW at 700 rpm. The maximum permissible angle of twist in the shaft is 1o. The inner diameter of the shaft is 0.7 times the outer diameter. The modulus of ... shaft is _______. (a) 43 to 45 (b) 50to 60 (c) 70 to 80 (d) 85 to 100
Last Answer : (a) 43 to 45
Description : What is the shear stress acting on the outer surface of a hollow shaft subjected to a torque of 100 Nm?(The inner and outer diameter of the shaft is 15 mm and 30 mm respectively.) a. 50.26 N/mm2 b. 40.24 N/mm2 c. 20.120 N/mm2 d. 8.74 N/mm2
Last Answer : c. 20.120 N/mm2
Description : The torque transmitted by a hollow shaft of outer diameter (D) and inner diameter (d) (a)π/4fs(D2-d2)/D (b) π/4fs(D3-d3)/D (c) π/4fs(D4-d4)/D (d) π/4fs(D4-d4)/D
Last Answer : (c) π/4fs(D4-d4)/D
Description : The polar moment of inertia of a hollow shaft of outer diameter (D) and inner diameter (d) is given by. (a)π/16(D3-d3) (b) π/16(D4-d4) (c) π/16(D4-d4) (d) π/16(D4-d4/d)
Last Answer : (b) π/16(D4-d4)
Description : The ratio of strength of a hollow shaft to that of a solid shaft subjected to torsion if both are of the same material and of the same outer diameters, the inner diameter of hollow shaft being half of the outer diameter is a. 15/16 b. 16/15 c. 7/8 d. 8/7
Last Answer : a. 15/16
Description : Cylinder having inner diameter to wall thickness ratio less than 15 are a) Thin cylinders b) Thick Cylinders c) Moderate cylinders d) none of the above
Last Answer : b) Thick Cylinders
Description : Different types of bearings are designed to operate at different operating speeds. Speed is specified as the maximum (a) rpm (b) metres/second (c) metres/minute (d) metres/hour
Last Answer : (b) metres/second
Description : A rolling contact bearing is specified as X307. Determine the series. a) Extra light series b) Light series c) Medium series d) Heavy series
Last Answer : c) Medium series
Description : In standard taper roller bearings, the angle of taper of the outer raceway is (a) 5° (b) 8° (c) 15° (d) 25°
Last Answer : (d) 25°
Description : For a helical torsion sprig, the stress concentration factor at outer fibre is? Give spring index=5. a) 0.78 b) 0.87 c) 1.87 d) 0.69
Last Answer : b) 0.87
Description : A circular solid of uniform thickness 20 mm, radius 200 mm and mass 20 kg, is used as a flywheel. If it rotates at 600 rpm, the kinetic energy of the flywheel, in joules is 1. 395 2. 790 3. 1580 4. 3160
Last Answer : 2. 790
Description : A journal bearing with hydrodynamic lubrication is running steadily with a certain amount of minimum film thickness. When the load and speed are doubled, how does the minimum film thickness vary? [IES-2008 ... Gets reduced to one-fourth of original value (d) Gets reduced to half of original value
Last Answer : (a) Remains unchanged
Description : In hydrodynamic lubrication, film thickness remains unaffected by change in speeds. a) True b) Increase with increase in speed c) Decrease with increase in speed d) Disappear as the speed tends to infinty
Last Answer : b) Increase with increase in speed
Description : The spring index indicates the relative sharpness of the ___ of the coil. (A) length (B) curvature (C) thickness (D) none of the above
Last Answer : (B) curvature
Description : Double full fillet welded joint cannot be used for a plate thickness greater than i. 1/8” ii. 3/8” iii. 5/8” iv. None
Last Answer : iii. 5/8”
Description : Single full fillet welded joint cannot be used for a plate thickness greater than i. 1/8” ii. 2/8” iii. 3/8” iv. None
Last Answer : iii. 3/8”
Description : Find the bending stress in the top weld is if thickness of weld is t. Given P=15kN and e=120mm. a) 230/t b) 360/t c) 200/t d) None of the listed
Last Answer : b) 360/t
Description : Calculate the moment of inertia about the axis parallel to welds and shift it to CG by considering thickness of welds t. a) tɜ+2000t b) None of the listed c) 250000 t d) 125000 t
Last Answer : c) 250000 t
Description : Thickness of plate is required more in welding than in riveting. a) True b) False
Last Answer : b) False
Description : The key in the form of semi-circular disk of uniform thickness is called, (A) Sunk key (B) Feather key (C) Woodruff key (D) Kennedy key
Last Answer : (C) Woodruff key