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WorksheetsMDSP ELEMENTS SET 2
Total questions: 100
Worksheet time: 2hrs 40mins
Name
Class
Date
1.
Which of the following is a higher pair?
a)
(a) Belt and pulley
b)
(b) Turning pair
c)
(c) Screw pair
d)
(d) Sliding pair
2.
A point on a connecting link (excluding end points) of a double slider crank mechanism traces a
a)
(a) External spring force is less than the inertia force of the follower
b)
(b) External spring force is greater than the inertia force of the follower
c)
(c) External spring force is zero
d)
(d) The inertia force is more than the spring force
3.
The uniform pressure theory as compared to the uniform wear theory gives
a)
(a) higher frictional torque
b)
(b) lower frictional torque
c)
(c) either lower or higher frictional torque
d)
(d) none of these
4.
The efficiency of a self locking screw is
a)
(a) more than 50%
b)
(b) less than 50%
c)
(c) equal to 50%
d)
(d) none of these
5.
In flat belt drive, if the slip between the driver and the belt is 1%, that between belt and follower is 3% and driver and follower pulley diameters are equal, then the velocity ratio of the drive will be
a)
(a) 0.99
b)
(c) 0.97
c)
(b) 0.98
d)
(d) 0.96
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.
Which one of the following is not a friction clutch?
a)
(a) Disc or plate clutch
b)
(b) Cone clutch
c)
(c) Centrifugal clutch
d)
(d) Jaw clutch
8.
This type of bin combines the design of both funnel and mass flow bins, and have performance characteristics intermediate of the two types.
a)
(a) Funnel-flow bins
b)
(b) Mass-flow bins
c)
(c) Expanded-flow bins
d)
(d) None of the above.
9.
Idler pulley is used
a)
(a) For changing the direction of motion of the belt
b)
(b) For applying tension
c)
(c) For increasing velocity ratio
d)
(d) All of the above
10.
The minimum number of links in a constrained planar mechanism involving revolute pairs and two higher pairs is:
a)
(a) 3
b)
(b) 4
c)
(c) 5
d)
(d) 6
11.
Deep groove ball bearings are used for
a)
(a) heavy thrust load only
b)
(b) small angular displacement of shafts
c)
(c) radial load at high speed
d)
(d) combined thrust and radial load at high speed
12.
Balancing of a rigid rotor can be achieved by appropriately placing balancing weights in
a)
(a) a single plane
b)
(b) two planes
c)
(c) three planes
d)
(d) four planes
13.
Pick the wrong statement. A flywheel
a)
(a) Is used to limit the inevitable fluctuation of speed during each cycle
b)
(b) Controls the mean speed of rotation
c)
(c) Stores up energy and gives up whenever required
d)
(d) Regulates the speed during one cycle of a prime mover
14.
Purpose of using differential gear in automobile is to
a)
(a) Help in turning
b)
(b) Control speed
c)
(c) Avoid jerks
d)
(d) Obtain rear movement
15.
The acceleration of Simple Harmonic Motion of a pendulum is proportional to
a)
(a) Length of pendulum
b)
(b) Time period
c)
(c) Angular velocity
d)
(d) Displacement
16.
In a single reduction, a large velocity ratio is required. The best transmission is
a)
(a) Spur gear drive
b)
(b) Helical gear drive
c)
(c) Worm gear drive
d)
(d) Bevel gear drive
17.
A pantograph is a device that reproduces a displacement
a)
(a) On the same scale
b)
(b) On any scale
c)
(c) On reduced scale
d)
(d) On enlarged scale
18.
In the case of gyroscopic effect, the planes of spin, gyroscopic couple and precession are
a)
(a) In same plane
b)
(b) In different planes
c)
(c) Any two in perpendicular planes and third in different plane
d)
(d) Mutually perpendicular
19.
Which of the following is a lower pair?
a)
(a) Piston and cylinder
b)
(b) Cam and follower
c)
(c) Belt drive
d)
(d) Gear
20.
Ratio of pitch circle diameter in millimeters to the number of teeth, is known as
a)
(a) Module
b)
(b) Circular pitch
c)
(c) Diametral pitch
d)
(d) Clearance
21.
Governor is used in automobile to
a)
(a) decrease the variation of speed
b)
(b) to control dN/dt
c)
(c) to control dN
d)
(d) None of these
22.
In SHM, acceleration is proportional to
a)
(a) velocity
b)
(b) displacement
c)
(c) rate of change of velocity
d)
(d) none of these
23.
A four-bar chain mechanism in which link 1 is fixed. The number of instantaneous centers could be
a)
(a) 2
b)
(b) 4
c)
(c) 6
d)
(d) 3
24.
This is the angle formed between the surface of pile and the horizontal. Also known as angle of natural slope, angle of natural friction, and angle of internal friction.
a)
(a) Cone angle
b)
(b) Bevel angle
c)
(c) Angle of repose
d)
(d) Angle of obliquity
25.
In roll machines, this is the gap between the rolling surfaces.
a)
(a) nip
b)
(b) tin
c)
(c) pin
d)
(d) rollers
26.
These are used to size reduce nonmetallic materials (e.g., coal) and dry chemicals (limestone, starch, pigments, etc.) requiring a finished size of approximately 35 micrometer to 800 micrometer.
a)
(a) Disk mills
b)
(b) Ring roller mills
c)
(c) Agitator ball mills
d)
(d) Mechanical impact mills
27.
Which among the following types of mills, using steel disks are similar in operation to old flour mills using millstones?
a)
(a) Disk mills
b)
(b) Ring roller mills
c)
(c) Agitator ball mills
d)
(d) Mechanical impact mills
28.
Sensitiveness of a governor is
a)
(a) The ratio of the difference between the maximum and minimum
b)
(b) The ratio of the maximum speed to miniumum speed withint the operating range
c)
(c) The ratio of the difference between the maximum and mean speed to that of minimum to mean speed
d)
(d) The range of variation of engine speed
29.
In simple harmonic motion the acceleration is proportional to
a)
(a) Displacement
b)
(b) Linear velocity
c)
(c) Angular velocity
d)
(d) Rate of change of angular velocity
30.
Pitch diameter is equal to the product of
a)
(a) Circular pitch and number of teeth
b)
(b) Working depth and number of teeth
c)
(c) Clearance and number of teeth
d)
(d) Module and number of teeth
31.
The governor is said to be stable when:
a)
(a) For each speed within the working range there is only one radius of rotation for the governor ball
b)
(b) The equilibrium speed is constant for all radii rotation of the balls within working angle
c)
(c) There is a slightest increase in speed, the governor balls will fly to this maximum radius
d)
(d) The governor admits either maximum or minimum amount of energy to the engine and will not admit an amount of energy between these two extremes.
32.
When the speed of the engine fluctuate continuously above and below the mean speed, then the governor is said to be:
a)
(a) Stable
b)
(b) Unstable
c)
(c) Isochronous
d)
(d) Hunting
33.
A machine mounted on a single coil spring has a period of free vibration of T. If the spring is cut into four equal parts and placed in parallel and the machine is mounted on them, then the period of free vibration of the new system will become
a)
(a) 16T
b)
(b) 4T
c)
(c) T/4
d)
(d) T/16
34.
Which one of the following pairs is correctly matched
a)
(a) Coulomb - Energy Principle
b)
(b) Rayleigh – Dynamic Equilibrium
c)
(c) D’Alembert – Damping Force
d)
(d) Fourier – Frequency Domain Analysis
35.
Whirling speed of a shaft coincides with the natural frequency of its
a)
(a) longitudinal vibration
b)
(b) transverse vibration
c)
(c) torsional vibration
d)
(d) coupled bending torsional vibration
36.
Which of the following is a wrought “carbon-free” nickel softer than regular nickel and does not work-harden as rapidly?
a)
(a) E Nickel
b)
(b) L Nickel
c)
(c) D Nickel
d)
(d) Duranickel
37.
The number of degree of freedom of a five link plane mechanism with five revolute pairs is
a)
(a) 3
b)
(b) 4
c)
(c) 1
d)
(d) 2
38.
To ensure self locking in a screw jack, it is essential that helix angle is
a)
(a) Larger than friction angle
b)
(b) None of these
c)
(c) Equal to friction angle
d)
(d) Smaller than friction angle
39.
In this type of mill, including hammer mills, free-moving particles strike a single beating surface at high speed.
a)
(a) Disk mills
b)
(b) Ring roller mills
c)
(c) Agitator ball mills
d)
(d) Mechanical impact mills
40.
The escape velocity from the surface of the earth is approximately equal to
a)
(a) 9.81 km/s
b)
(b) 11.2 km/s
c)
(c) 14.0 km/s
d)
(d) 22.0 km/s
41.
Oldham's coupling is the inversion of
a)
(a) four-bar mechanism
b)
(b) crank and lever mechanism
c)
(c) single slider crank mechanism
d)
(d) double slider crank mechanism
42.
Given below are four Vee twin engines with different included angles between cylinder axes. Which one of these engines can be completely balanced for primary forces by attaching a single revolving mass opposite to the crank pin?
a)
(a) Vee 45° twin engine
b)
(b) Vee 90° twin ingine
c)
(c) Vee 60° twin engine
d)
(d) Vee 120° twin engine
43.
A four stroke six-cylinder in line engine symmetrical about centre line can be balanced for :
a)
(a) Primary inertia forces and couples only
b)
(b) Primary and secondary inertia forces only
c)
(c) Secondary inertia forces and couples only
d)
(d) All forces and couples
44.
Introduction of the flywheel in a rotating system smoothness:
a)
(a) The bending moment on the rotating shaft
b)
(b) The twisting moment on the shaft
c)
(c) The bending stress on the shaft
d)
(d) The axial force along the shaft
45.
Flywheel absorbs energy during those periods of crank rotation when:
a)
(a) The twisting moment is greater than the resisting moment
b)
(b) The twisting moment is equal to the resisting moment
c)
(c) The twisting moment is less than the resisting moment
d)
(d) The load on the engine falls
46.
The advantages of involute profile over cycloidal are given below. Which of these in not correct?
a)
(a) The interference is inherently absent in the involute system
b)
(b) In the involute system, the pressure angle is constant from commencement to end of engagement
c)
(c) The straight teeth of the basic rack for the involute profile-admits of simple tools
d)
(d) The profile for the flank and face is a single curve in the involute system
47.
The number of degrees of freedom of an epicyclic gear train used in differential is
a)
(a) Zero
b)
(b) One
c)
(c) Two
d)
(d) Three
48.
In a Watt governor the weight of the ball is 50 N and the friction at the sleeve is 10 N. The coefficient of detention would be:
a)
(a) 5.0
b)
(b) 0.5
c)
(c) 0.2
d)
(d) 0.1
49.
If the radius is doubled and the speed is reduced to half of its original value, the centrifugal force would become:
a)
(a) 2.0 times the original value
b)
(b) 0.5 times the original value
c)
(c) 0.2 times the original value
d)
(d) 0.1 times the original value
50.
Also known as belt elevator, this is used for carrying bulk materials consists of buckets, a belt, a method of driving the belt, and accessories for loading and unloading the material, maintaining belt tension, and so on.
a)
(a) Load elevator
b)
(b) Bucket elevator
c)
(c) Basket elevator
d)
(d) All of the above.
51.
In order to have complete balance of several revolving masses mounted in different planes and different angular positions over a shaft
a)
(a) The resultant force must be zero
b)
(b) The resultant couple must be zero
c)
(c) The resultant force as well as couple must be zero
d)
(d) Either the resultant force or the resultant couple must be zero
52.
The function of the governor is
a)
(a) To limit the fluctuations of speed during each cycle
b)
(b) To maintain the supply of fuel to the engine cycle constant when the load on the engine varies
c)
(c) To maintain constant speed of rotation of the crank shaft when the load on the engine varies
d)
(d) To maintain constant speed of rotation of the crank shaft when the load on the engine is constant
53.
The primary function of the flywheel is
a)
(a) To limit the fluctuations of speed during each cycle
b)
(b) To absorb energy during those periods of crank rotation when turning moment is less than the resisting moment
c)
(c) To maintain constant speed of rotation of the crank shaft when the load on the engine increases
d)
(d) To maintain constant speed of rotation of the crank shaft when the load on the engine decreases
54.
The tooth profile most commonly used in gear drives for power transmission is
a)
(a) a cycloid
b)
(b) an involute
c)
(c) an ellipse
d)
(d) a parabola
55.
A governor is said to be isochronous when the equilibrium speed for all radii of rotation the balls within the working range
a)
(a) is not constant
b)
(b) is constant
c)
(c) varies uniformly
d)
(d) has uniform acceleration
56.
In reciprocating engines primary forces
a)
(a) are completely balanced
b)
(b) are partially balanced
c)
(c) are balanced by secondary forces
d)
(d) cannot be balanced
57.
____ is a wrought, age-hardenable nickel alloy possessing high strength and hardness in addition to the resistance to corrosion characteristic of nickel.
a)
(a) E Nickel
b)
(b) L Nickel
c)
(c) D Nickel
d)
(d) Duranickel
58.
The number of links in pantograph mechanism is equal to
a)
(a) 2
b)
(b) 3
c)
(c) 4
d)
(d) 5
59.
A slinder crank chain consist of which of the following numbers of turning pair and sliding
a)
(a) 3, 1
b)
(b) 1, 3
c)
(c) 2, 2
d)
(d) 3, 0
60.
Total number of instantaneous centres of rotation for a mechanism having n links is
a)
(a) n(n-1)/2
b)
(b) n/2
c)
(c) n-1
d)
(d) n
61.
Creep of belt can be controlled by
a)
(a) Decreasing belt length
b)
(b) Reducing stress in belt
c)
(c) Increasing centre distance
d)
(d) Reducing belt velocity
62.
The differential screw is used in a
a)
(a) Turnbuckle
b)
(b) Micrometer
c)
(c) Vernier caliper
d)
(d) Coupler
63.
Multistart threads are used to get
a)
(a) Smaller linear displacement
b)
(b) Larger linear displacement with assured self locking
c)
(c) Larger linear displacement with no guarantee of self locking
d)
(d) None of the above
64.
Stub tooth is
a)
(a) Provided on the rack only
b)
(b) A tooth of standard profile
c)
(c) Larger than standard tooth
d)
(d) Shorter than standard tooth
65.
A body in motion will be subjected to Corioli's accelertion when that body is
a)
(a) in plane rotation with varibale velocity
b)
(b) in plane translation with variable velocity
c)
(c) in plane motion which is a resultant of plane translation and rotation
d)
(d) restrained to rotate while sliding over another body
66.
In the case of involute system of gears, if the centre distance is changed
a)
(a) The velocity ratio changes
b)
(b) The pressure angle changes
c)
(c) The pitch circle remain unaffected
d)
(d) The law of gearing fails to get satisfied
67.
The differential gear is fitted on rear axle of automobiles; its function is
a)
(a) To rotate the front wheels at different speeds
b)
(b) To rotate the back wheels at the same speed during turning
c)
(c) To rotate the back wheel at different speeds during turning
d)
(d) To permit the two back wheels to rotate at the different speeds when driving in the straight path
68.
These steels are oil-hardened, cold work tool steels and sometimes referred to as nondeforming steels.
a)
(a) Group S steels
b)
(b) Group M steels
c)
(c) Group O steels
d)
(d) Group T steels
69.
This category of steel contains no nickel and differ from ferritic stainless steels primarily in higher carbon contents.
a)
(a) Non ferritic stainless steel
b)
(b) Ferritic stainless steel
c)
(c) Austenitic stainless steel
d)
(d) Martensic stainless steel
70.
In gramophones for adjusting the speed of the turn table, which of the following type of governer is commonly employed?
a)
(a) Hartung governor
b)
(b) Wilson Hartnell governor
c)
(c) Pickering governor
d)
(d) None of these
71.
A point on a rigid link AB moves with respect to A with angular velocity w rad/sec. The total acceleration of B with respect to A will be equal to
a)
(a) vector sum of radial component and Coriolis component
b)
(b) vector sum of tangential component and Coriolis component
c)
(c) vector difference of radial component and tangential component
d)
(d) vector sum of radial component and tangential component
72.
In pantograph, all the pairs are
a)
(a) turning pair
b)
(b) sliding pairs
c)
(c) spherical pairs
d)
(d) none of these
73.
The radial distance from the top of a tooth to the bottom of another tooth, is called
a)
(a) dedendum
b)
(b) addendum
c)
(c) clearance
d)
(d) working depth
74.
This material is produced by reheating white cast iron to between 1500F and 1850F (800 C and 1000 C) for several days, followed by slow cooling.
a)
(a) Malleable cast iron
b)
(b) Mottled cast iron
c)
(c) Compacted graphitic iron
d)
(d) Wrought iron
75.
In a simple gear train, if the number of idler gears is odd, then the direction of motion of driven gear will
a)
(a) Be same as that of the driving gear
b)
(b) Be opposite to that of the driving gear
c)
(c) Depend upon the number of teeth on the driving gear
d)
(d) Depend upon the total number of teeth on all gears of the train
76.
The creep in a belt drive is due to the
a)
(a) Material of the pulleys
b)
(b) Material of the belt
c)
(c) Unequal size of the pulleys
d)
(d) Unequal tension on tight and slack sides of the belt
77.
If the speed of an engine varies between 390 and 410 rpm in a cycle of operation, the coefficient of fluctuations of speed would be:
a)
(a) 0.01
b)
(c) 0.04
c)
(b) 0.02
d)
(d) 0.05
78.
The most popular and standard type for all purpose tool steels is 18:4:1 High Speed Steel (H.S.S.), which contains.
a)
(a) 18% chromium, 4% tungsten and 1% vanadium
b)
(b) 18% tungsten, 4% vanadium and 1% chromium
c)
(c) 18% tungsten, 4% chromium and 1% vanadium
d)
(d) 18% vanadium, 4% chromium and 1% tungsten
79.
Thrust bearings of the sliding type are often provided with multiple sector-shaped bearing pads of the tilting type instead of a continous annular bearing surface in order to
a)
(a) distribute the thrust load more non- uniformly
b)
(b) provide limited adjustments to shaft misalignments
c)
(c) enable the formation of a wedge shaped oil film
d)
(d) enable lubricating oil to come into contact with the total bearing area.
80.
Static balancing is satisfactory for low speed rotor but with increasing speeds, dynamic balancing becomes necessary. This is because, the
a)
(a) the unbalanced couples are caused only at higher speeds
b)
(b) unbalanced forces are not dangerous at higher speeds
c)
(c) effects of unbalances are proportional to the square of the speed
d)
(d) effects of unbalance are directly proportional to the speed.
81.
Burger vector in case of screw dislocation is
a)
(a) inclined to the dislocation line
b)
(b) parallel to the dislocation line
c)
(c) perpendicular to the dislocation line
d)
(d) at an acute angle to the dislocation line
82.
The angle of Vee belts is
a)
(a) 10⁰
b)
(b) 35⁰
c)
(c) 50⁰
d)
(d) 45⁰
83.
A point on a link connecting double slider crank chain traces a/an
a)
(a) Straight line path
b)
(b) Circular Path
c)
(c) Parabolic path
d)
(d) Elliptical path
84.
The recrystallisation temperature of Tin is
a)
(a) 300°C
b)
(b) 1000°C
c)
(c) 650°C
d)
(d) below room temperature
85.
Which abrasive material is used in grinding wheels?
a)
(a) Silicon carbide
b)
(b) Tungsten carbide
c)
(c) Aluminium carbide
d)
(d) Tungsten oxide
86.
The sum of the tensions when the belt is running on the pulley is
a)
(a) less than the initial tension
b)
(b) more than the initial tension
c)
(c) more than twice the initial tension
d)
(d) half the initial tension
87.
In a kinematic chain, the minimum number of kinematic pairs required is
a)
(a) one
b)
(b) two
c)
(c) three
d)
(d) four
88.
A bicycle remains stable in running through a bend because of
a)
(a) Gyroscopic action
b)
(b) Coriolis acceleration
c)
(c) Centrifugal action
d)
(d) Radius of curved path
89.
The Whitworth quick return mechanism is formed in a slider-crank chain when the
a)
(a) crank is fixed
b)
(b) longest link is a fixed link
c)
(c) slider is a fixed link
d)
(d) smallest link is a fixed link
90.
This nickel contains 2.0% manganese.
a)
(a) E Nickel
b)
(b) D Nickel
c)
(c) L Nickel
d)
(d) Duranickel
91.
The most suitable bearing for carrying very heavy loads with slow speed is
a)
(a) hydrodynamic bearing
b)
(b) ball bearing
c)
(c) roller bearing
d)
(d) hydrostatic bearing
92.
In a flat belt drive, the belt can be subjected to maximum tension (T) and centrifugal tension ( ). The condition of transmission of maximum power is given by
a)
(a) T = T_c
b)
(b) T = 2T_c
c)
(c) T = 3T_c
d)
(d) T = √3 T_c
93.
Curve B holds good for
a)
(a) Porter governor
b)
(b) Stable Hartnell governor
c)
(c) Unstable Hartnell governor
d)
(d) Isochronous Hartnell governor
94.
When a governor is over sensitive, the sleeve will oscillate between two extreme positions when there is slight change of speed. Then the governor is said to be
a)
(a) hunting
b)
(b) stable
c)
(c) isochronous
d)
(d) none of these
95.
The moment of friction with assumption of uniform pressure compared to uniform wear is
a)
(a) same
b)
(b) greater
c)
(c) lower
d)
(d) could be anything
96.
The speed range suitable for Watt's governor is
a)
(a) 20-50 rpm
b)
(b) 60-80 rpm
c)
(c) 250-500 rpm
d)
(d) 80-125 rpm
97.
If ϕ be the angle of friction for a square threaded screw, then maximum efficiency of the screw jack will be
a)
(a) (1-sinϕ)/sinϕ
b)
(b) (1-sinϕ)/(1+sinϕ)
c)
(c) (1+sinϕ)/(1-sinϕ)
d)
(d) 1-sinϕ
98.
On the motors with the low starting torque
a)
(a) Multiple-plate clutch
b)
(b) Cone clutch
c)
(c) Centrifugal clutch
d)
(d) Single plate clutch with both sides Effective
99.
The maximum efficiency of screw jack having square threads and friction angle of 30 degrees will be
a)
(a) 11%
b)
(b) 22%
c)
(c) 33%
d)
(d) 50%
100.
The centrifugal tension in belts
a)
(a) reduces power transmission
b)
(b) increases power transmission
c)
(c) does not affect power transmission
d)
(d) none of these
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