wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

MDSP ELEMENTS SET 3

Total questions: 100

Worksheet time: 2hrs 40mins

Name
Class
Date
1.
The number of link and instantaneous centres in a reciprocating engine mechanism are
a)
(a) 4,4
b)
(b) 6,4
c)
(c) 4,6
d)
(d) 5,4
2.
In a gib and cotter joint, the gib and cotter are subject to
a)
(a) Single shear only
b)
(b) Double shear only
c)
(c) Single shear and crushing
d)
(d) Double shear and crushing
3.
For heavy thrust, the contact angle in tapered roller bearings varies between
a)
(a) 28-30°
b)
(b) 5-10°
c)
(c) 15-20°
d)
(d) 30-40°
4.
Surface endurance limit of gear material depends on its
a)
(a) Surface shear
b)
(b) Modulus of elasticity
c)
(c) Elastic strength
d)
(d) All of the above
5.
A hollow shaft of same cross-section area as solid shaft transmits
a)
(a) Same torque
b)
(b) Less torque
c)
(c) More torque
d)
(d) Unpredictable
6.
If a number of forces act on a rigid body, each force may be replaced by an equal and parallel force acting through a fixed point, together with a couple. For the rigid body to be in equilibrium
a)
(a) Both resultant force and couple must be zero
b)
(b) The resultant couple on the body must be zero
c)
(c) The resultant force at the fixed point must be zero
d)
(d) None of the above need be zero
7.
In I section shear load is resisted mainly by
a)
(a) Flanges only
b)
(b) Web only
c)
(c) Both by flanges and web
d)
(d) None of these
8.
Shear force is
a)
(a) Rate of change of loading
b)
(b) Sum of bending moments
c)
(c) Rate of change of bending moment
d)
(d) None of the above
9.
Maximum shear stress in Mohr's circle is
a)
(a) Radius of circle
b)
(b) Diameter of circle
c)
(c) Center of circle from y-axis
d)
(d) Chord of circle
10.
If a material expands freely due to heating it will develop
a)
(a) Thermal stresses
b)
(b) Tensile stress
c)
(c) No stress
d)
(d) Bending
11.
Gantry girders are invariably designated to resist
a)
(a) Transverse loads only
b)
(b) Lateral loads only
c)
(c) Transverse and lateral loads
d)
(d) Transverse, lateral and axial load
12.
The plane of maximum shear stress has normal stress that is
a)
(a) maximum
b)
(b) minimum
c)
(c) zero
d)
(d) none of these
13.
A thick cylinder is subjected to external pressure. The magnitude of hoop stress at internal radius will be
a)
(a) equal to the magnitude of hoop stress at external radius
b)
(b) less than the magnitude of hoop stress at external radius
c)
(c) greater than the magnitude of hoop stress at external radius
d)
(d) equal to the magnitude of radial stress at internal stress
14.
The 'Euler' load for a column is 1000 kN and crushing load is 1500 kN. The 'Rankine' load is equal to
a)
(a) 600 kN
b)
(b) 1000 kN
c)
(c) 1500 kN
d)
(d) 2500 kN
15.
For a linearly elastic, isotropic and homogeneous material, the number of elastic constants required to relate stress and strain is
a)
(a) two
b)
(b) three
c)
(c) four
d)
(d) six
16.
Young's modulus of elasticity and Poisson's ratio of a material are 1.25 × 10^5 MPa and 0.34 respectively. The modulus of rigidity of the material is
a)
(a) 0.4025 × 105 MPa
b)
(b) 0.4664 × 105 MPa
c)
(c) 0.8375 × 105 MPa
d)
(d) 0.9469 × 10³ MPa
17.
Which one of the following materials is highly elastic?
a)
(a) Rubber
b)
(b) Brass
c)
(c) Steel
d)
(d) Glass
18.
The ratio of Young's modulus of elasticity to modulus of rigidity for a material having Poisson's ratio 0.2 is
a)
(a) 12/5
b)
(b) 5/12
c)
(c) 5/14
d)
(d) 14/5
19.
Bending moment M and torque is applied on a solid circular shaft. If the maximum bending stress equals to maximum shear stress developed, then M is equal to
a)
(a) T/2
b)
(b) T
c)
(c) 2T
d)
(d) 4T
20.
Maximum deflection in cantilever due to pure bending moment M at its end is
a)
(a) ML^2/2EI
b)
(b) ML^2/3EI
c)
(c) ML^2/4E1
d)
(d) ML^2/6EI
21.
Maximum shear stress in Mohr's circle is equal to
a)
(a) Radius of circle
b)
(b) Diameter of circle
c)
(c) Center of circle from y-axis
d)
(d) Chord of circle
22.
A beam of circular cross-section of diameter 'd' is subjected to a direct compressive axial load and an eccentric compressive load of eccentricity 'e'. In order that tensile stress induced is zero, the limiting region for application of the load should be the shaded concentric circle of diameter
a)
(a) d/3
b)
(b) d/4
c)
(c) d/6
d)
(d) d/8
23.
A composite section made of two materials has moduli of elasticity in the ratio 1:2 and lengths in the ratio 2: 1. The ratio of corresponding stress under a direct load is
a)
(a) 2:1
b)
(b) 1:2
c)
(c) 4:1
d)
(d) 1:4
24.
The unit of elastic modulus is the same as those of
a)
(a) stress, shear modulus and pressure
b)
(b) strain, shear modulus and force
c)
(c) shear modulus, stress and force
d)
(d) stress, strain and pressure
25.
The value of Poisson's ratio is always less than
a)
(a) 1
b)
(b) 0.2
c)
(c) 0.4
d)
(d) 0.5
26.
The material of a rubber balloon has a Poisson's ratio of 0.5. If uniform pressure is applied to blow the balloon, the volumetric strain of the material will be
a)
(a) 0.50
b)
(c) 0.20
c)
(b) 0.25
d)
(d) zero
27.
Cylinder is said to be thin if the thickness to diameter ratio is less than
a)
(a) 1/5
b)
(c) 1/15
c)
(b) 1/10
d)
(d) 1/20
28.
Bending moment on a section .... where shearing force is zero.
a)
(a) Minimum
b)
(b) Maximum
c)
(c) Zero
d)
(d) Changes sign
29.
Failure of a ductile materials is best explained by
a)
(a) principal stress criterion
b)
(b) principal strain criterion
c)
(c) distortion energy criterion
d)
(d) strain energy criterion
30.
Tensile strength of a mild steel specimen can be roughly predicted from which of the following hardness test
a)
(a) Brinell
b)
(b) Rockwell
c)
(c) Vicker
d)
(d) None of these
31.
A bolt is threaded through a tubular sleeve and the nut is turned up just tight. Then the nut is turned further, the bolt being put in tension and the sleeve in compression. The distance by which the nut is turned is equal to
a)
(a) deformation in the bolt
b)
(b) deformation in the sleeve
c)
(c) difference in deformation in the bolt and the sleeve
d)
(d) summation of deformations in the bolt and the sleeve
32.
The effective diameter of an external or internal screw thread, is known as
a)
(a) Minor diameter
b)
(b) Major diameter
c)
(c) Pitch diameter
d)
(d) None of these
33.
When the strain in a material increases with time under sustained constant stress, the phenomenon is known as
a)
(a) Strain hardening
b)
(b) Hysteresis
c)
(c) Creep
d)
(d) Visco-elasticity
34.
The endurance limit in shear of carbon steel can be obtained by multiplying the endurance limit in flexure by a factor of
a)
(a) 0.25
b)
(b) 0.45
c)
(c) 0.75
d)
(d) 0.65
35.
The ratio between the stress product in a bar by a sudden application of load (impact loading) as compared to the stress produced by the gradual application of same load is
a)
(a) 1.5
b)
(b) 2.0
c)
(c) 2.5
d)
(d) 3.0
36.
A piece of material neither expands nor contracts in volume when subjected to stress, in the Posson's ratio must be:
a)
(a) Zero
b)
(b) 0.25
c)
(c) 0.33
d)
(d) 0.5
37.
Materials which show direction dependent properties are called:
a)
(a) Homogenous
b)
(b) Viscoelastic
c)
(c) Isotropic
d)
(d) Anisotropic
38.
Which of the following statements are correct? I. Shear force is usually associated with bending moment II. The shear force on a beam causes linear transverse displacement III. The shear force causes shear stress on all the planes
a)
(a) I only
b)
(b) II only
c)
(c) I and II only
d)
(d) II and III only
39.
At T-section beam is simply supported and subjected to a uniform distributed load over its whole span. Maximum longitudinal
a)
(a) Top fibre of the flange
b)
(b) The junction of web and flange
c)
(c) The mid-section of the web
d)
(d) The bottom fibre of the web
40.
Resilience of material becomes important when it is subjected to:
a)
(a) Fatigue
b)
(b) Thermal stresses
c)
(c) Shock loading
d)
(d) Pure static loading
41.
System A is simply supported beam with a load Pat mid-span. System B is the same beam but the load is replaced by a udl of intensity P/L wherein L is span. The mid- span deflection of system B will
a)
(a) be the same as that of system A at mid-span
b)
(b) be less than that of system A at mid-span
c)
(c) be more than that of system A at mid- span
d)
(d) bear no relation to that of system
42.
Oldham’s coupling is used to connect two shaft
a)
(a) which have lateral misalignment
b)
(b) whose axes intersect at a small angie
c)
(c) which are not in exact alignment
d)
(d) all of these
43.
A bar of copper and steel form a composite system which is heated through a temperature of 40°C. The stress induced in the copper bar is
a)
(a) Tensile
b)
(b) Compressive
c)
(c) Both tensile and compressive
d)
(d) Shear
44.
The buckling load for a column hinged at both ends is 10 kN. If the ends are fixed, the buckling load changes to
a)
(a) 40 kN
b)
(b) 2.5 kN
c)
(c) 5 kN
d)
(d) 20 kN
45.
The piston pin bearings in heavy duty diesel engines are
a)
(a) Needle roller bearings
b)
(b) Tapped roller bearings
c)
(c) Spherical roller bearings
d)
(d) Cylindrical roller bearings
46.
Relationship between modulus of elasticity E, modulus of rigidity G and Poisson's ratio u is
a)
(a) G=E/2(1 + µ)
b)
(b) G=E(2-μ)
c)
(c) E=G(1 + µ)
d)
(d) G=E/(1 +µ)
47.
A Mohr's circle reduces to a point when the body is subjected to
a)
(a) Pure shear
b)
(b) Uniaxial stress only
c)
(c) Equal & opposite axial stresses on two mutually perpendicular planes, the planes being free of shear.
d)
(d) Equal axial stresses are on two mutually perpendicular planes, the planes being free of shear.
48.
Proof resilience may be defined as
a)
(a) Work done in straining the material
b)
(b) Maximum strain energy that can be stored in a material per unit volume
c)
(c) Maximum strain energy that can be stored in a material under elastic condition
d)
(d) Maximum load which can be applied to a member
49.
There are two bars of equal length and equal volume and same material, one having stepped diameters and other having uniform diameter. If maximum stress produced in both bars is same, then stored energy will be
a)
(a) More in stepped diameter shaft
b)
(b) More in uniform diameter shaft
c)
(c) Equal in both
d)
(d) Depend on other factors
50.
In a lever, Leverage is the ratio of
a)
(a) load lifted to the effort applied
b)
(b) load arm to the effort arm
c)
(c) effort arm to load arm
d)
(d) any one of these
51.
A cantilever beam 'A' with rectangular cross-section is subjected to a concentrated load at its free end. If width and depth of another cantilever beam 'B' are twice those of beam A, then the deflection at free end of the beam 'B' as compared to that of 'A' will be
a)
(a) 6.25%
b)
(b) 14%
c)
(c) 2.36%
d)
(d) 28%
52.
Two shafts A & B are made of same material. The radius of the shaft A is half that of shaft B. The power transmitted by the shaft A will be ...... that of shaft B.
a)
(a) 1/8 times
b)
(b) 8 times
c)
(c) sixteen times
d)
(d) twice
53.
Maximum shear stress developed in a beam of rectangular section bears a constant ratio to the average shear stress and this ratio is equal to
a)
(a) 1.33
b)
(b) 1.5
c)
(c) 2.0
d)
(d) 2.5
54.
Elastic limit of cast iron as compared to its ultimate breaking strength is
a)
(a) Half
b)
(b) Double
c)
(c) Approximately
d)
(d) None of the above
55.
If diameter of a long column is reduced by 20%, the percentage reduction in Euler's buckling load for the same end condition is
a)
(a) 4
b)
(b) 36
c)
(c) 49
d)
(d) 60
56.
If both the mean coil diameter and wire diameter of a helical compression or tension spring be doubled, then the deflection of the spring close coiled under same applied load will
a)
(a) be doubled
b)
(b) be halved
c)
(c) increase four times
d)
(d) get reduced to one-fourth
57.
A spring with 25 active coils cannot be accommodated within a agiven space. Hence 5 coils of the spring are cut. What is the stiffness of the new spring?
a)
(a) Same as the original spring
b)
(b) 1.25 times the original spring
c)
(c) 0.8 times the original spring
d)
(d) 0.5 times the original spring
58.
Deformation per unit length in the direction of force is known as
a)
(a) strain
b)
(b) lateral strain
c)
(c) linear strain
d)
(d) linear stress
59.
If part is constrained to move and heated, it will develop
a)
(a) principal stress
b)
(b) tensile stress
c)
(c) compressive stress
d)
(d) shear stress
60.
Modulus of Rigidity is defined as the ratio of
a)
(a) longitudinal stress and longitudinal strain
b)
(b) volumetric stress and volumetric strain
c)
(c) lateral stress and lateral strain
d)
(d) shear stress and shear strain
61.
The strain energy stored in a body due to suddenly applied load compared to when it is applied gradually is
a)
(a) same
b)
(b) ten times
c)
(c) four times
d)
(d) eight times
62.
Longitudinal stress in a thin cylinder is
a)
(a) equal to the hoop stress
b)
(b) twice the hoop stress
c)
(c) half of the hoop stress
d)
(d) one-fourth of the hoop stress
63.
Twisting couple in a shaft introduces in it
a)
(a) bending moment
b)
(b) deflection
c)
(c) shear strain
d)
(d) shear stress
64.
Section modulus Z is expressed as
a)
(a) I/y
b)
(b) E/I
c)
(c) M/I
d)
(d) EI
65.
The design of Thin Cylindrical Shells is based on
a)
(a) hoop stress
b)
(b) longitudinal stress
c)
(c) volumetric stress
d)
(d) average of hoop and longitudinal stress
66.
Radius of curvature of a stressed beam and modulus of elasticity
a)
(a) are directly proportional
b)
(b) are inversely proportional
c)
(c) are curvilinearly related
d)
(d) have unpredictable relationship
67.
A steel bar is fixed at both ends. If the bar is heated, it will develop
a)
(a) Compressive stress
b)
(b) Tensile stress
c)
(c) Bending stress
d)
(d) None of the above
68.
Spring back in metal forming depends on
a)
(a) Modulus of elasticity
b)
(b) Load applied
c)
(c) Strain Rate
d)
(d) None of these
69.
A 5 mm diameter aluminium alloy test bar is subjected to a load of 500 N. If the diameter of the bar at this load is 4 mm, the true strain is
a)
(a) 0.56
b)
(b) 0.22
c)
(c) 0.25
d)
(d) 0.45
70.
A circular shaft is subjected to a torque "T" and a Bending Moment M. The ratio of Max. shear stress to max. bending stress, is
a)
(a) 2M/T
b)
(b) T/2M
c)
(c) 2T/M
d)
(d) M/2T
71.
In a hydrodynamic lubricated bearing there is a
a)
(a) thick film of lubricant between the journal and the bearing
b)
(b) thin film of lubricant between the journal and the bearing
c)
(c) no lubricant between the journal and the bearing
d)
(d) lubricant is forced between the journal and the bearing by external pressure
72.
A thin walled spherical shell is subjected to an internal pressure. If the radius of the shell is increased by 1% and the thickness is reduced by 1%, with the internal pressure remaining the same, the percentage change in the circumferential (hoop) stress is
a)
(a) 0
b)
(b) 1
c)
(c) 1.08
d)
(d) 2.02
73.
A long thin wall cylinder shell, closed at both the ends, is subjected to an internal pressure. The ratio of the hoop stress (circumferential stress) to longitudinal stress developed in the shell is
a)
(a) 0.5
b)
(b) 1.0
c)
(c) 2.0
d)
(d) 4.0
74.
A column has a rectangular cross-section of 10 mm x 20 mm and length of 1 m. The slenderness ratio of the column is close to
a)
(a) 200
b)
(b) 346
c)
(c) 477
d)
(d) 1000
75.
For a long slender column of uniform cross section, the ratio of critical buckling load for the case with both ends clamped to the case with both ends hinged is
a)
(a) 1
b)
(b) 2
c)
(c) 4
d)
(d) 8
76.
The state of stress at a point under plane stress condition is Sx = 40 MPa Sy = 100 MPa Ss = 40 MPa The radius of Mohr's circle representing the given stress in MPa is
a)
(a) 40
b)
(b) 50
c)
(c) 60
d)
(d) 100
77.
In full depth 14 1/2 degree involute system, the smallest number of teeth in a pinion which meshes with rack without interference is :
a)
(a) 12
b)
(b) 16
c)
(c) 25
d)
(d) 32
78.
According to law of gearing, the common normal at the point of contact between a pair of teeth must always pass through the:
a)
(a) Pitch point
b)
(b) Flank of tooth
c)
(c) Face of tooth
d)
(d) None of the above.
79.
In crown bevel gears, axes of two shafts intersect at:
a)
(a) Angle more than 90° and one of the bevel gears has a pitch angle of 90°
b)
(b) 90°
c)
(c) 45°
d)
(d) None of the above.
80.
When two shafts are neither parallel nor intersecting, power can be transmitted by using:
a)
(a) A pair of spur gears
b)
(b) A pair of helical gears
c)
(c) An Oldham’s coupling
d)
(d) A pair of spiral gears.
81.
Bevel Factor for a Bevel Gear (where, R = Pitch Cone Radius and b = Face Width of gear) is given by:
a)
(a) (R-b)/R
b)
(b) (R+b)/R
c)
(c) R/(R-b)
d)
(d) None of the above
82.
The face angle of bevel gear is equal to:
a)
(a) Pitch angle + addendum angle
b)
(b) Pitch angle — addendum angle
c)
(c) Pitch angle + dedendum angle
d)
(d) Pitch angle — dedendum angle
83.
Gear lapping:
a)
(a) An operation after heat treatment
b)
(b) An operation prior to heat treatment
c)
(¢) An independent operation for gear reconditioning
d)
(d) None of the above.
84.
Gears used to keep noise minimum, is:
a)
(a) Bevel gears
b)
(b) Helical gears
c)
(c) Spur gears
d)
(d) Spiral gears
85.
A Worm and Worm Wheel is used to transmit power between non-parallel and:
a)
(a) Non-intersecting shafts that usually cross each other at 90°
b)
(b) Intersecting shafts
c)
(c) Intersecting at any angle
d)
(d) None of the above.
86.
In hypoid gears, the axes of the shafts are:
a)
(a) Non-parallel, non-intersecting and teeth are curved
b)
(b) Non-parallel, non-intersecting and teeth are straight
c)
(c) Intersecting and teeth are curved
d)
(d) Intersecting and teeth are straight.
87.
When a shaft transmits power through gears, the shaft experiences:
a)
(a) Torsional stress alone
b)
(b) Bending stress alone
c)
(c) Constant bending and varying torsional stresses
d)
(d) Vary bending and constant torsional stresses
88.
Miter gears are:
a)
(a) Right angled bevel gears with same number of teeth
b)
(b) Spur gears with same number of teeth
c)
(c) Helical gears with same number of teeth
d)
(d) None of the above.
89.
The backlash for spur gear depends upon:
a)
(a) Tooth profile
b)
(b) Module
c)
(c) Pitch line velocity
d)
(d) Both tooth module and pitch line velocity.
90.
Helix angle for double helical gears may be up to:
a)
(a) 15°
b)
(b) 20°
c)
(c) 35°
d)
(d) 45°
91.
The Helix Angle for a Helical Gear varies between:
a)
(a) 20" to 45"
b)
(b) 10" to 12°
c)
(c) 64° to 72"
d)
(d) None of the above.
92.
The curve traced by a point on the circumference of a circle which rolls along the inside of a fixed circle, is known as:
a)
(a) Epicycloid
b)
(b) Hypocycloid
c)
(c) Cardiod
d)
(d) Involute.
93.
In worm gears, angle between the pitch helix and an element of the cylinders, is known as:
a)
(a) Helix angle
b)
(b) Angle of approach
c)
(c) Pressure angle
d)
(d) Pitch lead angle.
94.
Under similar conditions, the Wear Strength of Helical Gear, as compared to Spur Gear, is:
a)
(a) Same
b)
(b) Double of helix angle is 45°
c)
(c) Smaller
d)
(d) Larger.
95.
Friction losses in spur gears are:
a)
(a) Less than 5%
b)
(b) 5% to 10%
c)
(c) 10 to 20%
d)
(d) None of the above.
96.
Rack is a gear with:
a)
(a) Infinite number of teeth
b)
(b) Infinite pitch circle diameter
c)
(c) Space width equal to thickness of mating tooth
d)
(d) Working depth equal to tooth thickness.
97.
For design, a spur gear tooth is considered as:
a)
(a) Vital component
b)
(b) A cantilever
c)
(c) A rough surface rubbing with another rough surface
d)
(d) None of the above.
98.
With smaller Gear Ratio, it is desirable to connect two parallel shafts by:
a)
(a) Spur Gear with full depth teeth
b)
(b) Helical Gears
c)
(c) Spur Gear with stub teeth
d)
(d) Herring Bone Gear.
99.
Stub teeth are provided on gears:
a)
(a) For low noise
b)
(b) For large power transmission
c)
(c) For high velocity ratio
d)
(d) To improve capability to withstand shock and vibrations.
100.
In involute gears the pressure angle is:
a)
(a) Dependent on the size of teeth
b)
(b) Dependent on the size of gears
c)
(c) Always constant
d)
(d) Always variable.