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WorksheetsMDSP ELEMENTS SET 1
Total questions: 100
Worksheet time: 2hrs 40mins
Name
Class
Date
1.
Which one of the following statement is correct? If the size of a flywheel in a punching machine is increased
a)
(a) Then the fluctuation of speed and fluctuation of energy will both decrease
b)
(b) Then the fluctuation of speed and fluctuation of energy will both decrease
c)
(c) Then the fluctuation of speed will increase and the fluctuation of energy will decrease
d)
(d) Then the fluctuation of speed and fluctuation of energy both will increase.
2.
Which one of the following drives is used for a constant velocity ratio, positive drive with large centre distance between the driven and driver
a)
(a) Gear drive
b)
(b) Flat belt drive
c)
(c) Chain drive
d)
(d) V-belt drive
3.
What is the value of radius of gyration of disc type flywheel as compared to rim type flywheel for the same diameter?
a)
(a) √2 times
b)
(b) 1/(2√2) times
c)
(c) 2 times
d)
(d) ½ times
4.
ABCD is a four bar mechanism, in which AD is the fixed link, and link BC, is in the form of a circular disc with centre P. In which one of the following cases P will be the instantaneous centre of the disc?
a)
(a) If it lies on the perpendicular biscetor of line BC
b)
(b) If it lies on the intersection of the perpendicular bisector of BC & AD
c)
(c) If it lies on the intersection of the perpendicular bisector of AB & CD
d)
(d) If it lies on the intersection of the extensions of AB and CD
5.
Which one of the following statements is correct? In a petrol engine mechanism the velocity of the piston is maximum when the crank is
a)
(a) At the dead centres
b)
(b) At right angles to the line of stroke
c)
(c) Slightly less than 90° to line stroke
d)
(d) Slightly above 90° to line of stroke
6.
In a different mechanism, two equal sized level wheels A and B are keyed to the two halves of the rear axle of a motor car. The car follows a curved path
Which one of the following statements are correct?
The wheels A and B will revolve at different speeds and casing will revolve at a speed which is equal to the
a)
(a) Difference of speeds of A and B
b)
(b) Arithmetic mean of the speeds of A and B
c)
(c) Geometric mean of the speeds of A and B
d)
(d) Harmonic mean of the speeds of A and
7.
Which one of the following conversion is used by a lawn-sprinker which is a four bar mechanisms?
a)
(a) Reciprocating motion to rotary motion
b)
(b) Reciprocating motion to oscillatory motion
c)
(c) Rotary motion to oscillatory motion
d)
(d) Oscillatory motion to rotary motion
8.
Consider the ff. methods:
1. Trifiler suspension
2. Torsional oscillation
3. Fluctuation of energy of engine
4. Weight measurement and measurement of radius of flywheel
Which of the above methods are used to determine the polar mass moment of inertia of an engine flywheel with arms?
a)
(a) 1 and 4
b)
(b) 2 and 3
c)
(c) 1,2, and 3
d)
(d) 1,2 and 4
9.
This is a removable or permanent cylindrical sleeve-shaped lining, inserted into a hole in a parent material in order to reduce friction between a rotating shaft and the parent material or to constrain the movement of the shaft.
a)
(a) Roller
b)
(b) Bushing
c)
(c) Bearing
d)
(d) Collar
10.
Which one of the following statements is correct? A governer will be stable if the radius of rotation of the balls
a)
(a) Increases as the equilibrium speed decrease
b)
(b) Decreases as the equilibrium speed increases
c)
(c) Increases as the equilibrium speed increases
d)
(d) Remains unaltered with the change in equilibrium speed
11.
Which one of the following statements in the context of balancing in engines is correct?
a)
(a) Magnitude of the primary unbalancing force is less than the secondary unbalancing force.
b)
(b) The primary unbalancing force attains its maximum value twice in one revolution of the crank
c)
(c) The hammer blow in the locomotive engine occurs due to unbalanced force along the line of stroke of the piston
d)
(d) The unbalanced force due to reciprocating masses varies in magnitude and direction
12.
This nickel contains 2.0% manganese.
a)
(a) E Nickel
b)
(b) D Nickel
c)
(c) L Nickel
d)
(d) Duranickel
13.
Which type of gears are used for shaft axes having an offset?
a)
(a) Mitre gears
b)
(b) Spiral bevel gears
c)
(c) Hypoid gears
d)
(d) Zerol gears
14.
Which one of the following statement is correct? Certain miniumum number of teeth on the involute Pinion are necessary in order to
a)
(a) Provide an economical design
b)
(b) Avoid interference
c)
(c) Reduce noise in operation
d)
(d) Overcome fatigue failure of the teeth
15.
Power screws are used to produce uniform, slow and powerful motion such a required in presses, jacks and other machinery. 'V' threads are usually not used for this application due to low efficiency. This is because of
a)
(a) Profile angle is zero
b)
(b) Profile angle is moderate
c)
(c) Profile angle is large
d)
(d) There is difficulty in manufacturing the profile
16.
Spiral gears are used to connect
a)
(a) Two parallel shafts
b)
(b) Two intersecting shafts
c)
(c) Two non-parallel and non-intersecting shafts
d)
(d) None of the above
17.
Which among the following have the same compositions but different atomic structures (microstructures), volumes, electrical resistances, and magnetic properties?
a)
(a) Delta-iron
b)
(b) Gamma-iron
c)
(c) Allotropes
d)
(d) Cementite
18.
In a kinematic chain, a quaternary joint is equivalent to
a)
(a) One binary joint
b)
(b) Two binary joints
c)
(c) Three binary joints
d)
(d) Four binary joints
19.
A hooke's joint is used to connect two
a)
(a) Coplanar and non-parallel shafts
b)
(b) Non-coplanar and non-parallel shafts
c)
(c) Coplanar and parallel shafts
d)
(d) Non-coplanar and parallel shafts
20.
Which one of the following governor is used to drive a gramophone?
a)
(a) Watt governor
b)
(b) Porter governor
c)
(c) Pickering governor
d)
(d) Hartnell governor
21.
Which of the following can completely balance several masses revolving in different planes on a shaft?
a)
(a) A single masss in one of the planes of the revolving masses.
b)
(b) A single mass in any one plane
c)
(c) Two masses in any two planes
d)
(d) Two equal masses in any two planes
22.
What is the number of nodes in a shaft carrying three rotors?
a)
(a) Zero
b)
(b) 2
c)
(c) 3
d)
(d) 4
23.
Which one of the following statements is not correct?
a)
(a) Hooke's joint is used to connect two rotating co-planner, non-intersecting shafts.
b)
(b) Hooke’s joint is used to connect two rotating coplanar
c)
(c) Oldham’s coupling is used to connect two parallel rotating shafts.
d)
(d) Hooke's joint is used in the steering mechanism for automobiles.
24.
In case of belt drives, the effect of the centrifugal tension is to
a)
(a) Cause the belt to leave the pulley and increase the power to be transmitted
b)
(b) Cause the belt to stay on the pulley and increase the power to be transmitted
c)
(c) Reduce the driving power of the belt
d)
(d) Stretch the belt in longitudinal direction
25.
What is the efficiency of a self-locking power screw?
a)
(a) 70%
b)
(b) 60%
c)
(c) 55%
d)
(d) <50%
26.
In heavy-duty gear drives, proper heat treatment of gears is necessary in order to
a)
(a) Avoid interference
b)
(b) Prevent noisy operation
c)
(c) Minimize wear of gear teeth
d)
(d) Provide resistance against impact loading on gear teeth
27.
Which of the following is/are used for cutting internal gears?
1. Gear hobber
2. Gear shaper
3. Rack cutter
4. Jig corer
Select the correct given below:
a)
(a) Only 1 and 2
b)
(c) Only 1 and 4
c)
(b) Only 2 and 3
d)
(d) Only 2
28.
What is the number of instantaneous centre of rotation for a 6-link mechanism?
a)
(a) 4
b)
(b) 6
c)
(c) 12
d)
(d) 15
29.
In which one of the following is a flywheel generally employed?
a)
(a) Lathe
b)
(b) Electric motor
c)
(c) Punching Machine
d)
(d) Gear box
30.
What is the value of pressure angle generally used for involute gears?
a)
(a) 35 deg
b)
(b) 30 deg
c)
(c) 25 deg
d)
(d) 20 deg
31.
Which one of the following is the correct statement?
In meshing gears with involute gear teeth, the contact begins at the intersection of the
a)
(a) Line of action and the addendum circle of the driven gear
b)
(b) Line of action and the pitch circle of the driven gear
c)
(c) Addendum circle of the driver gear and the addendum circle of the drive gear
d)
(d) Addendum circle of the driver gear and the pitch circle of the driven gear
32.
The turning moment diagram for a single cyclinder double acting steam engine consists of +ve and —ve loops above and below the average torque line. For the +ve loop, the ratio of the speeds of the flywheel at the begining and end is which one of the following:
a)
(a) Less than unity
b)
(b) Equal to unity
c)
(c) Greater than unity
d)
(d) Zero
33.
When two shafts are neither parallel nor intersecting, power can be transmitted by using:
a)
(a) When crank angle = 0°
b)
(b) When crank angle = 90°
c)
(c) When crank angle = 45°
d)
(d) Never
34.
This nickel contains 4.5% manganese.
a)
(a) E Nickel
b)
(b) D Nickel
c)
(c) L Nickel
d)
(d) Duranickel
35.
What is the direction of the Coriolis component of acceleration in a slotted lever crank mechanism?
a)
(a) Along with the sliding velocity vector
b)
(b) Along with the direction of the crank
c)
(c) Along a line rotated 90° from the sliding velocity vector in a direction opposite to the angular velocity of the slotted lever
d)
(d) Along a line rotated 90° from the sliding velocity vector in a direction same as that of the angular velocity of the slotted lever
36.
For a governor running at constant speed. What is the value of the force acting on the sleeve?
a)
(a) Zero
b)
(b) Variable depending upon the load
c)
(c) Maximum
d)
(d) Minimum
37.
In a kinematic chain, a ternary joint is equivalent of
a)
(a) One binary joint
b)
(b) Two binary joints
c)
(c) Three binary joints
d)
(d) None of the above
38.
What is the condition for dynamic balancing of a shaft-roto system?
a)
(a) ∑M=0 and ∑F=0
b)
(b) ∑M=0
c)
(c) ∑F=0
d)
(d) ∑M+ ∑F=0
39.
A motion is a periodic at what value of the damping factor?
a)
(a) 1.0 or above
b)
(c) 0.3
c)
(b) 0.5
d)
(d) 0.806
40.
In a 6 × 20 wire rope, No. 6 indicates the
a)
(a) Diameter of the wire rope in mm
b)
(b) Number of strands in the wire rope
c)
(c) Number of wires
d)
(d) Guage number of the wire
41.
Which one of the following statements relating to belt drivers is correct?
a)
(a) The rotational speeds of the pulley are directly proportional to their diameters
b)
(b) The length of the crossed belt increases as the sum of the diameter of the pulleys increases
c)
(c) The crowning of the pulley is done to make the drive sturdy
d)
(d) The slip increase the velocity ratio
42.
A force 'F' is to be transmitted through a square-threaded power screw into a nut. If 't' is the height of the nut and 'd' is the minor diameter, then which one of the following is the average shear stress over the screw thread?
a)
(a) 2F/πdt
b)
(b) F/πdt
c)
(c) F/2πdt
d)
(d) 4F/πdt
43.
Gearing contact is which one of the following?
a)
(a) Sliding contact
b)
(b) Sliding contact, only rolling at pitch point
c)
(c) Rolling contact
d)
(d) Rolling and sliding at each point of contact
44.
For a speed ratio of 100 smallest gear box is obtained by using which of the following?
a)
(a) A pair of spur gears
b)
(b) A pair of bevel and pair of spur gears in compound fear train
c)
(c) A pair of helical and a pair of spur gears in compound gear train
d)
(d) A pair of helical and a pair of worm gears in compound gear train
45.
Among the following four designs of a flywheel with given mass M (kg) and external diameter D(m), which is the one with the highest energy storage capacity?
a)
(a) Plain circular disc of uniform thickness
b)
(b) Double conical disc thicker at the centre and thinner at the periphery
c)
(c) Double conical disc thinner at the centre and thicker at the periphery
d)
(d) Circular ring with spokes
46.
Which one of the following mechanisms represents an inversion of the single slider crank chain?
a)
(a) Elliptical trammel
b)
(b) Oldham's coupling
c)
(c) Whitworth quick return mechanism
d)
(d) Pantograph mechanism
47.
Which mechanism produces intermittent rotary motion from continuous rotary motion?
a)
(a) Whitworth mechanism
b)
(b) Scotch yoke mechanism
c)
(c) Geneva mechanism
d)
(d) Elliptical mechanism
48.
Which one of the following is correct? When two teeth profiles of gears are conjugate, the sliding velocity between them
a)
(a) Is always zero all through the path of contact
b)
(b) Is zero, at certain points along the path of contact
c)
(c) Is never zero anywhere on the path of contact
d)
(d) Can be made zero by proper selectron of profiles
49.
In a flat belt drive the belt can be subjected to a maximum tension T and centrifugal tension Tc. What is the condition for transmission of maximum power?
a)
(a) T=Tc
b)
(b) T= √3 Tc
c)
(c) T=2Tc
d)
(d) T=3Tc
50.
In automobiles, Hooke's joint is used between which of the following?
a)
(a) Clutch and gear box
b)
(b) Gear box and a differential
c)
(c) Differential and wheels
d)
(d) Flywheel and clutch
51.
For roller chain drive with sprocket having 10 teeth, the velocity of the driven shaft with respect to that of drive will be approximately:
a)
(a) Same
b)
(b) 5% above
c)
(c) 5% below
d)
(d) 5% above to 5% below
52.
This is also known as apparent modulus, determined from tensile creep testing, is the instantaneous ratio of stress to creep strain.
a)
(a) Deflection
b)
(b) Creep Modulus
c)
(c) Shear Modulus
d)
(d) None of the above.
53.
Why is an offset provided in a radial cam- translating follower mechanism?
a)
(a) To avoid obstruction due to some other machine part
b)
(b) To decrease pressure angle during ascent of the follower
c)
(c) To increase pressure angle during ascent of the follower
d)
(d) To decrease pressure angle during descent of the follower
54.
The line, below which the alloy is in solid state and where solidification completes is known
a)
(a) liquidus
b)
(b) solidus
c)
(c) gaseous
d)
(d) semi liquidus
55.
The velocity of the chip relative to the tool face
a)
(a) chip velocity
b)
(b) cutting speed
c)
(c) relative velocity
d)
(d) None of the above.
56.
This occurs when the opening at the base of the bin is too small.
a)
(a) Arching or Bridging
b)
(b) Rat-holing or Piping
c)
(c) Segragation
d)
(d) None of the above.
57.
This occurs when the slope of the bin walls is not great enough for gravity to overcome the friction between the material and the walls.
a)
(a) Arching or Bridging
b)
(b) Rat-holing or Piping
c)
(c) Segragation
d)
(d) None of the above.
58.
This bin have long, upright walls that narrow only near the bottom.
a)
(a) Funnel-flow bins
b)
(b) Mass-flow bins
c)
(c) Expanded-flow bins
d)
(d) None of the above.
59.
This configuration is for ropes that are wound in the same direction, resulting in a wear resistant rope that is more prone to unwinding.
a)
(a) Straight lay
b)
(b) Lang lay
c)
(c) Regular lay
d)
(d) Opposite lay
60.
Also known as tube mills, commonly used for wet grinding.
a)
(a) Disk mills
b)
(b) Ring roller mills
c)
(c) Agitator ball mills
d)
(d) Mechanical impact mills
61.
This was introduced in the mid-1970's to provide a consistent identification of metals and alloys for use throughout the world.
a)
(a) Unified Numbering System (UNS)
b)
(b) American Petroleum Institute (API)
c)
(c) American Society of Mechanical Engineering (ASME)
d)
(d) American Iron and Steel Institute (AISI)
62.
Which of the following statement is INCORRECT?
a)
(a) Grashofs rule states that for a planar crank-rocker four bar mechanism, the sum of the shortest and longest link lengths cannot be less than the sum of the remaining two link lenghts
b)
(b) Inversions of a mechanism are created by fixing different links one at a time
c)
(c) Geneva mechanism is an intermittent motion device
d)
(d) Grubler's criterion assumes mobility of a planar mechanism to be one.
63.
A planar mechanism has 8 links and 10 rotary joints. The number of degrees of freedom of the mechanism, using Gruebler's criterion, is
a)
(a) 0
b)
(b) 1
c)
(c) 2
d)
(d) 3
64.
For a four bar linkage in toggle position, the value of mechanical advantage is
a)
(a) 0.0
b)
(b) 0.5
c)
(c) 1.0
d)
(d) Infinity
65.
The number of inversions for a slider crank chain is
a)
(a) 6
b)
(b) 5
c)
(c) 4
d)
(d) 3
66.
In a four-bar linkage, S denotes the shortest link lengh, L is the longest link length, P and Q and lengths of other two links. Atleast one of the three moving links will rotate by 360° if
a)
(a) S+L≤ P+Q
b)
(b) S+L> P+Q
c)
(c) S+P≤ L+Q
d)
(d) S+P> L+Q
67.
This group of steel is water-hardened tool steels.
a)
(a) Group W steels
b)
(b) Group S steels
c)
(c) Group A steels
d)
(d) Group O steels
68.
The gear train usually employed in clocks is a
a)
(a) Reverted gear train
b)
(b) Simple gear train
c)
(c) Sun and planet gear
d)
(d) Differential gear
69.
This is a general name given to a wide range of alloys containing iron, carbon, and silicon, and to a lesser extent manganese, phosphorous and sulfur.
a)
(a) Steel
b)
(b) Cast iron
c)
(c) Carbon
d)
(d) Metal
70.
A mechanism is an assembly of
a)
(a) two links
b)
(b) three links
c)
(c) four links or more than four links
d)
(d) All of the above
71.
The value of velocity and acceleration of piston at near dead centre for a slider-crank mechanism will be
a)
(a) 0, and more than ω^2 r
b)
(b) 0, and less than ω^2 r
c)
(c) 0, 0
d)
(d) ωr, 0
72.
The radius of gyration of disc type flywheel of diameter D is
a)
(a) D
b)
(b)D/2
c)
(c) D/(2√2)
d)
(d) √2/3 D
73.
The critical speed depends on
a)
(a) mass
b)
(b) stiffness
c)
(c) mass and stiffness
d)
(d) mass, stiffness and eccentricity
74.
For 20° pressure angle, minimum number of teeth on gear will be
a)
(a) 6
b)
(b) 12
c)
(c) 18
d)
(d) 20
75.
The rotor of a turbine of a ship rotates clockwise when looking from the stern. If the ship travelling at certain velocity steers to the left, then the bow will
a)
(a) remain in the same position
b)
(b) fall
c)
(c) be unpredictable
d)
(d) rise
76.
When the angle of inclination of crank with inner dead centre of a reciprocating engine is 45°, then
a)
(a) primary force is maximum
b)
(b) secondary force is maximum
c)
(c) secondary force is zero
d)
(d) primary force is zero
77.
Automobile steering gear is an example of
a)
(a) lower pair
b)
(b) sliding pair
c)
(c) turning pair
d)
(d) spherical pair
78.
The horse power transmitted by a belt is dependent upon
a)
(a) tension on tight side of the belt
b)
(b) tension on slack side of the belt
c)
(c) radius of pulley
d)
(d) All of these
79.
If the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then energy stored in the later at the same speed will be
a)
(a) Four times the first one
b)
(b) Same as the first one
c)
(c) One and a half times the first one
d)
(d) One fourth of the first one
80.
What is a unique form of cast iron with worm-shaped graphite particles?
a)
(a) Malleable cast iron
b)
(b) Mottled cast iron
c)
(c) Compacted graphitic iron
d)
(d) Wrought iron
81.
In a multi-plate clutch with number of outer discs and number of inner discs, the number of pairs of active surfaces is
a)
(a) n_1 + n_o
b)
(b) ) n_1 + n_o +1
c)
(c) n_1 + n_o - 1
d)
(d) n_1 + n_o - 2
82.
In a slider-crank mechanism, the maximum acceleration of slider is obtained when the crank is
a)
(a) at the inner dead centre position
b)
(b) at the outer dead centre position
c)
(c) exactly midway position between the two dead centres
d)
(d) Slightly in advance of the midway position between the two dead centres.
83.
For a screw, the angle of helix (a) is related to the lead (L) and mean screw thread diameter (d) as
a)
(a) tan∝= L/d
b)
(b) tan∝= d/L
c)
(c) tan∝= L/πd
d)
(d) tan∝= πd/L
84.
A slider crank chain is a four bar linkage consisting of
a)
(a) one sliding pair and two turning pairs
b)
(b) one sliding pair and three turning pairs
c)
(c) two sliding pairs and two rotating pairs
d)
(d) two sliding pairs and two turning pairs
85.
In this modern process, pig metal is melted in a cupola and is then highly purified in a Bessemer converter.
a)
(a) Puddling
b)
(b) Forging
c)
(c) Piercing
d)
(d) Aston
86.
Type of coupling used to join two shafts whose axes are neither in same straight line nor parallel but intersect is
a)
(a) flexible coupling
b)
(b) chain coupling
c)
(c) universal coupling
d)
(d) flange coupling
87.
When a ship travels in a sea, which of the effect is more dangerous?
a)
(a) Steering
b)
(b) Pitching
c)
(c) Rolling
d)
(d) All of these.
88.
If n links are connected at the same joint, the joint is equivalent to
a)
(a) (n - 1) binary joint
b)
(b) (2n – 1) binary joint
c)
(c) (n-2) binary joint
d)
(d) (n-3) binary joint
89.
In multi V-belt transmission, if one of the belt is broken, we have to change the
a)
(a) broken belt
b)
(b) all the belts
c)
(c) broken belt and its adjacent belts
d)
(d) all the weak belts
90.
In spur gears having involute teeth the product of circular pitch and diameter pitch is
a)
(a) π
b)
(b) 2π
c)
(c) 3π
d)
(d) 4π
91.
"If a number of co-planar forces are acting simultaneously on a particle, the algebraic sum of the moments of all the forces about any point is equal to the moment of their resultant force about the same point". This principle is known as
a)
(a) D'Alembert's principle
b)
(b) Lami's Theorem
c)
(c) Verignon's principle
d)
(d) Principle of transmissibility of forces
92.
The motion of a shaft in a circular hole is an example of
a)
(a) incompletely constraint motion
b)
(b) completely constraint motion
c)
(c) successfully constraint motion
d)
(d) free motion
93.
What alloy of nickel has high electrical resistance, high corrosion resistance, and high strength at red heat temperatures, making it useful in resistance heating?
a)
(a) Nichrome
b)
(b) Alnico
c)
(c) Invar
d)
(d) Elinvar
94.
Choose the wrong statement
a)
(a) the product of circular pitch and diametral pitch is equal to
b)
(b) the pressure angle for involute gears is always constant
c)
(c) the angular velocity ratio when two involutes are in mesh, is inversely proportional to the radius of the base circles
d)
(d) the involute function in terms of pressure angle op is equal to (p - tan q)
95.
The train value of gear train is
a)
(a) equal to the speed ratio
b)
(b) half of the speed ratio
c)
(c) reciprocal of the speed ratio
d)
(d) double the speed ratio
96.
A machine is said to be self-locking, if efficiency of the machine is
a)
(a) more than 50%
b)
(b) less than 50%
c)
(c) equal to 50%
d)
(d) equal to 100%
97.
The frictional torque, transmitted in case of flat pivot bearing for uniform pressure, is equal to
Where W= total axial load carried by pivot, μ = co-efficient of friction, and R = radius of bearing surface
a)
(a) μWR
b)
(b) (2/3) µWR
c)
(c) (1/3) µWR
d)
(d) (1/2) µWR
98.
The path, followed by the trace point if the follower moved about the cam, is known as
a)
(a) prime circle
b)
(b) base circle
c)
(d) pitch curve
d)
(c) pitch circle
99.
When the angle on inclination of crank with inner dead centre of a reciprocating engine is 45°, then
a)
(a) primary force is maximum
b)
(b) secondary force is maximum
c)
(c) primary force is zero
d)
(d) secondary force is zero
100.
In the case of a circular arc cam with a flat-faced reciprocating follower, when the follower is in contact with nose of cam, the external spring force required for maintaining the contact between follower and cam is:
a)
(a) Greater than the force due to gravity of mass of the follower
b)
(b) Greater than the intertia force of the follower
c)
(c) Smaller than the inertia force of the follower
d)
(d) Greater than the weight of the follower
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