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WorksheetsMECHANICS OF MACHINES
Total questions: 89
Worksheet time: 1hrs 29mins
Name
Class
Date
1.
A truck driver is trying to push a loaded truck with an applied force. Unfortunately, his attempt was unsuccessful the truck stays stationary no matter how hard the driver pushes. How much work is done by the driver?
a)
Fd
b)
–Fd
c)
F/d
d)
Zero
2.
If the distance moved by the effort is given by (y) and the distance moved by the load is goven by (x) velocity ratio is given by
a)
x/y
b)
x+y
c)
x-y
d)
y/x
3.
In ideal machine the relation between the output of machine and the input of machine is _______________
a)
Zero
b)
Positive
c)
Equal
d)
Negative
4.
In the image given below A nd B represents to
a)
A - Output of the machine,B - Input of the machine
b)
A - Mechanical advantage,B - Velocity ration
c)
A - Input of the machine,B - Output of the machine
d)
A - Velocity ratio,B - Mechanical Advantage
5.
In a lifting machine, an effort of 500 N is to be moved by a distance of 20 mto raise a load of 10,000 N by a distance of 0.8 m. Determine the velocity ratioand mechanical advantage.
a)
10 and 35
b)
20 and 35
c)
25 and 20
d)
10 and 25
6.
A push or a pull that can move an object is a __________.
a)
gear
b)
lever
c)
force
d)
machine
7.
A ___________ is a device by means of which work can be performed easily or in a convenient manner.
a)
Machine
b)
Human Hand
c)
Power
d)
Man
8.
You push a food tray 1.5 m along a cafeteria table with a constant force of 18 N. How much work do you do?
a)
12 Nm
b)
27 Nm
c)
19.5 Nm
d)
16.5 Nm
9.
Which of the following statements is true for Figure
a)
B – is the fulcrum, C- is the resistance, A – is the effort
b)
B – is the resistance, C – is the fulcrum, A – is the effort
c)
B – is the fulcrum, A – is the effort, C- is the resistance
d)
B – is the resistance, A – is the fulcrum, C – is the effort
10.
These two parts act as one simple machine. They roll and are found on cars, bikes and wheelbarrows.
a)
Screw
b)
Wheel and Axle
c)
Lever
d)
Inclined Plane
11.
This simple machine can be used to lift a weight. It has a fulcrum, or pivot point, which can be located in the center, near the end or at the end.
a)
Screw
b)
Wheel and Axle
c)
Lever
d)
Inclined Plane
12.
Examples of this simple machine are used to hold things together. It is made up of an inclined plane wrapped around a cylinder.
a)
Screw
b)
Wheel and Axle
c)
Lever
d)
Inclined Plane
13.
A heavy object could be rolled up this simple machine, instead of lifting it straight up. Using this simple machine can save effort, although the object must usually cover more distance if this simple machine is used.
a)
Screw
b)
Wheel and Axle
c)
Lever
d)
Inclined Plane
14.
In the image given below A represents which type of Lever
a)
Class 4 Lever
b)
Class 1 Lever
c)
Class 3 Lever
d)
Class 2 Lever
15.
In the image given below B represents which type of Lever
a)
Class 4 Lever
b)
Class 1 Lever
c)
Class 3 Lever
d)
Class 2 Lever
16.
In the image given below C represents which type of Lever
a)
Class 4 Lever
b)
Class 1 Lever
c)
Class 3 Lever
d)
Class 2 Lever
17.
Cars, Roller skates, Door knobs, Gears are example of _________ simple machine
a)
Lever
b)
Pulleys
c)
Incline Plane
d)
Wheel and Axle
18.
A lightbulb is an example of what simple machine?
a)
Wedge
b)
Pulley
c)
Screw
d)
Wheel and Axle
19.
Which is an example of someone using a simple machine to do work?
a)
a boy runs across a football field
b)
a banker counts money
c)
a mother pushes a stroller up a ramp into a building
d)
a girl eats a sandwich
20.
Without friction there would be _____________________
a)
less machine efficiency.
b)
greater output work than input work.
c)
greater input work than output work.
d)
equal input and output work.
21.
The arrangement of load, effort and fulcrum is ________ in ________ type of levers
a)
same, same
b)
different, different
c)
different, same
d)
same, different
22.
Bicyle is an example of __________________ machine
a)
ComplicatedMachine
b)
Simple Machine
c)
Compound Machine
d)
Fixed Machine
23.
Identify the image and select which statement is true for the given image.
a)
Moveable Pulley,Fixed Pulley,Combination Pulley
b)
Fixed Pulley,Moveable Pulley,Combination Pulley
c)
Fixed Pulley,Combination Pulley,Moveable Pulley
d)
Moveable Pulley,,Combination Pulley,Fixed Pulley
24.
_____________ is a device, which enables us to lift a heavy load (W) by applying a comparatively smaller Effort (P).
a)
Fixed Machine
b)
Lifting Machine
c)
Complex Machine
d)
Fluid Machine
25.
Above Graph which relates Load and Effort represents
a)
Law of Complex Machine
b)
Law of Compound machine
c)
Law of Lifting Machine
d)
Law of Simple Machine
26.
Law of Lifting machine is expressed by the Formula P=mW+C where Mechanical Advantage = 1/m.If mechanical advantage is 28 the the Formula can be expressed as
a)
P = 0.025W+C
b)
P=0.036W+C
c)
P=0.063W+C
d)
P=0.052W+C
27.
A jackscrew with a handle 30.0 cm long is used to lift a car sitting on the jack. The car raised 2.0 cm with every full turn of the handle. What is the ideal mechanical advantage of the jack? (C = 2πr).
a)
24.9
b)
49.2
c)
42.9
d)
94.2
28.
A screw jack lifts a load of 25 kN by an effort of 350 N at the end of a lever arm of 60 cm. If the pitch of the screw is 10 mm. Calculate the efficiency of the screw jack at this load.
a)
0.053
b)
0.2546
c)
0.1895
d)
0.75
29.
Identify which statements is corect related to this image.
a)
W = Load, L = Leg,P = Effort,p = power
b)
W = Load, L = Lever,P = Effort,p = Pitch
c)
W = Load, L = Leg,P = Push,p = Pull
d)
W = Load, L = Lever,P = Pull,p = Push
30.
A screw jack spindle is provided with ____________________
a)
Vee threads
b)
BSW threads
c)
Buttress threads
d)
Square threads
31.
When the screw in a mechanical screw jack rotates, the load kept on the top of it moves
a)
Axially Upwards
b)
Axially downwards
c)
Axially upwards/downwards
d)
Radially downwards
32.
A railway bridge, a roof truss, machine frames etc., are the examples of a _____________________
a)
Machine
b)
Structure
c)
Material
d)
Method
33.
Which statement is correct related to kinematic Pair ?
a)
Each part of a machine, which moves relative to some other part.
b)
Pairs are coupled in such a way that the last linkis joined to the first link to transmit definite motion
c)
It is a mechanical device used to transfer or transform motion, force, or energy.
d)
The two links of a machine, when in contact with each other, are said to form a pair, the relative motion between them is in a definite direction.
34.
In horizontal Flat belt drive,it is customary to use ______________
a)
Bottom side of belt drive as slack side
b)
Top side of belt drive as slack side
c)
Idler pulley
d)
None of the above
35.
Which of the Following is not correct related to image and belt material?
a)
Balata Belt
b)
Rubber Belt
c)
Cotton or Fabric Belt
d)
Balata Belt
36.
Choose the correct matching.
a)
A - 4, B - 3, C- 1, D - 2
b)
A - 4, B - 3, C - 2, D - 1
c)
A - 1, B - 4, C - 1,D -2
d)
A -2, B -3, C - 1, D - 2
37.
Which of the Following Shape is related to Flat Belt?
a)
Rectangular cross section
b)
Trapezoidal in cross section
c)
Trapezoidal and round tooth shape
d)
Circular cross section
38.
The strength of balata belts is ___________ higher than rubber belts.
a)
10 - 20%
b)
25 - 40 %
c)
15 - 25 %
d)
45 - 60%
39.
When there is no slip in the belt drive which of the following statement is true?
a)
Peripheral velocity of belt on driving pulley > Peripheral velocity of belt on driven pulley
b)
Peripheral velocity of belt on driving pulley < Peripheral velocity of belt on driven pulley
c)
Peripheral velocity of belt on driving pulley = Peripheral velocity of belt on driven pulley
d)
Peripheral velocity of belt on driving pulley + Peripheral velocity of belt on driven pulley
40.
V belts have v shaped cross section.
a)
No, rectangular
b)
No, trapezium
c)
No, circular
d)
No, spherical
41.
The efficiency of flat belt drive is 35%. If all the parameters are same and flat belt is replaced by V belt, than the efficiency of V belt will be?
a)
<35%
b)
>35%
c)
0.35
d)
Cant be determined
42.
The included angle for the V-belt is usually
a)
20° – 30°
b)
30° – 40°
c)
40° – 60°
d)
60° – 80°
43.
Which of the following statements are correct regarding power transmission through V-belts? 1) V-belts are used at the high-speed end.
2) V-belts are used at the low-speed end.
3) V-belts are of standard lengths.
4) V-angles of pulleys and belts are standardized.
Select the correct answer using the code given below.
a)
2, 3 and 4
b)
1 and 3 only
c)
2 and 4 only
d)
1, 3 and 4
44.
Which of the Following Shape is related to V Belt?
a)
Rectangular cross section
b)
Trapezoidal in cross section
c)
Trapezoidal and round tooth shape
d)
Circular cross section
45.
If fan sheave diameter = 11.5 inches , Motor sheave diameter = 6.5 inches,Input RPM = 1773, Calculate Output RPM.
a)
1002
b)
2001
c)
1020
d)
2010
46.
In replacing the V-belts, a complete set of new belts is used instead of replacing a single damaged belt because____________________
a)
Belts are available in sets
b)
Only one belt cannot be fitted with other used belts
c)
The new belt will carry more than its share and result in short life
d)
New and old belts will cause vibrations
47.
Which of the Following Shape is related to timing Belt?
a)
Rectangular cross section
b)
Trapezoidal in cross section
c)
Trapezoidal and round tooth shape
d)
Circular cross section
48.
In the given diagram A and B stand for ______________________
a)
A - Slack Side,B - Tight Side
b)
A - Tight Side,B - Slack side
c)
A - Upward side,B - Downward side
d)
A - Downdard side,B - Upward side
49.
In the image of timing belt given A,B,C represents the shape of which cross section.
a)
A - Trapezoidal,B - Curvilinear,C - Modified curvilinear
b)
A - Curvilinear ,B -Trapezoidal,C - Modified curvilinear
c)
A -Modified curvilinear,B - Curvilinear,C - Trapezoidal
d)
A - Trapezoidal,B -Modified curvilinear ,C - Curvilinear
50.
In order that a belt may not run off the pulley_____________
a)
It should be properly tightened
b)
The centre line of the belt as it approaches the pulley must lie in a plane perpendicular to the axis of that pulley
c)
The belt should be provided with frictional material
d)
The belt should be provided with a guide
51.
The velocity ratio of two pulleys connected by an open belt or crossed belt is_____________________________
a)
directly proportional to their diameters
b)
inversely proportional to their diameters
c)
directly proportional to the square of their diameters
d)
inversely proportional to the square of their diameters
52.
Idler pulley is used_____________________
a)
For changing the direction of motion of the belt
b)
For applying tension
c)
For increasing velocity ratio
d)
all of the above
53.
Which of the following statements are false for belt drives? 1. Belt drive is used in applications having constant speed drive
2. Belt drives can be used at extremely high speeds
3. Belt drives have low power transmitting capacity
4. Belt drives need continuous lubrication
a)
1 and 2
b)
1, 2 and 3
c)
2, 3 and 4
d)
1, 2 and 4
54.
Which of the drive is a positive drive
a)
Toothed belt
b)
Flat belt
c)
V belt
d)
Round belt
55.
Identify which type of belt drive is used in below image.
a)
Open belt drive
b)
Crossed belt drive
c)
Compound belt drive
d)
Stepped or cone pulley drive
56.
Identify which type of belt drive is used in below image.
a)
Open belt drive
b)
Crossed belt drive
c)
Compound belt drive
d)
Stepped or cone pulley drive
57.
In which of the following drives, there is no slip
a)
Open belt drive
b)
Crossed belt drive
c)
Rope drive
d)
Chain drive
58.
A mechanism consisting of toothed wheels that engage and transmit rotary motion, usually transforming angular velocity and torques is said to be________________________
a)
Rope Drive
b)
Belt Drive
c)
Gear Drive
d)
Chain Drive
59.
In worm and worm wheel , the shaft axes are at ____________
a)
90 degrees
b)
45 degrees
c)
180 degrees
d)
270 degrees
60.
Which of the following can be used for power transmission in intersecting shafts.
a)
Spur Gear
b)
Helical Gear
c)
Bevel Gear
d)
None of the listed
61.
Herringbone gear can be used in
a)
Intersecting shafts only
b)
Parallel shafts only
c)
Both intersection and parallel shafts
d)
None of the mentioned
62.
The gears are used to connect two parallel shafts except
a)
Spur gear
b)
Helical gear
c)
Double helical gears
d)
Bevel gears
63.
To connect two intersecting shafts we use
a)
Spur gear
b)
Helical gear
c)
Worm and wheel
d)
Bevel gears
64.
The gear used to convert rotary motion into translating motion is
a)
Worm and wheel
b)
Crown gear
c)
Rack and pinion
d)
Spiral Bevel gear
65.
Which of the following type of gear has inclined teeth?
a)
Spur gear
b)
Helical gear
c)
Spiral gear
d)
All of the above
66.
Which of the Gear is used in given image?
a)
Spur Gear
b)
Bevel Gear
c)
Worm and Worm Gear
d)
Rack and Pinion
67.
Equipment used to convert the output shaft revolutions of the main engine to those required is known as ____________
a)
Chain Drive
b)
Belt Drive
c)
Reduction Gear Box
d)
Rope Drive
68.
If the driver revolves at 120 rpm.What will be rpm of Driven?
a)
60
b)
240
c)
420
d)
120
69.
Calculate the speed of driven shaft in compound gear train, if the drivers have 40, 70, 100, and 150 teeth and followers have 15, 44, 60, 100 teeth. Speed of driving shaft is 150 rpm
a)
256 rpm
b)
1650 rpm
c)
1590.90 rpm
d)
1414 .28 rpm
70.
Calculate speed of driving shaft in compound gear train, if the drivers have 50, 60, 80 and 100 teeth and followers have 18, 40, 60 and 80 teeth. Speed of driven shaft is 150 rpm
a)
21.73 rpm
b)
30.23 rpm
c)
19.77 rpm
d)
None of the above
71.
The image belongs to which type of gear train
a)
Simple Gear Train
b)
Compound Gear Train
c)
Reverted Gear Tran
d)
Epicyclic Gear Train
72.
The image belongs to which type of gear train
a)
Simple Gear Train
b)
Compound Gear Train
c)
Reverted Gear Tran
d)
Epicyclic Gear Train
73.
The image belongs to which type of gear train
a)
Simple Gear Train
b)
Compound Gear Train
c)
Reverted Gear Tran
d)
Epicyclic Gear Train
74.
The image belongs to which type of gear train
a)
Simple Gear Train
b)
Compound Gear Train
c)
Reverted Gear Tran
d)
Epicyclic Gear Train
75.
Which of the following statements is/are true for a simple gear train?
a)
If number of idle gears is even, driving and driven wheels rotate in opposite direction
b)
If number of idle gears is odd, driving and driven wheels rotate in opposite direction
c)
If number of idle gears is even, driving and driven wheels rotate in same direction
d)
None of the above
76.
In which type of gear trains, shaft axes which are mounted by gear wheels have relative motion between them?
a)
Compounded gear train
b)
Simple gear train
c)
Epicyclic gear train
d)
Reverted gear train
77.
When there are more than one gear on a shaft , then the gear train is called a
a)
Compounded gear train
b)
Simple gear train
c)
Epicyclic gear train
d)
Reverted gear train
78.
Apart from reducing friction and wear, the secondary purpose(s) of lubricants is/are
a)
A. Heat dissipation.
b)
B. Reducing corrosion.
c)
C. Both (a) & (b).
d)
D. None of these.
79.
The Properties given such as Reduction of Friction,Cooling effect,Sealing Effect,Cleaning Effect relates to __________
a)
Solidification
b)
Ionisation
c)
Lubrication
d)
Liquidation
80.
Which one of the following is not the Property of Good Lubricant?
a)
Takes up the surface pressure between sliding parts
b)
Becomes thicker after prolonged use.
c)
No change in viscosity due to variation in temperature
d)
Reduce friction between machine parts.
81.
Lubricant is necessary to
a)
Produce workpieces of Greater accuracy
b)
Run the machine smoothly taking least load
c)
Run the machine Quickly
d)
stop the machine immediately
82.
Which is the best lubricant for Tractor Roller?
a)
Grease
b)
Vegetable oil
c)
Graphite
d)
Heavy oil
83.
What are the lubricants used for Railway Track?
a)
Vegetable oil
b)
Coconut oil
c)
Graphite
d)
None of the above
84.
Which of the following is not an advantage/benefit of solid lubricant?
a)
More effective at high loads.
b)
Resistance to deterioration.
c)
Good heat dissipation.
d)
Highly stable in extreme temperature and environment.
85.
Out of the following which is NOT an example of solid lubricant?
a)
Graphite lubricant.
b)
Molybdenum Sulphite lubricant.
c)
Polytetrafluoroethylene lubricant.
d)
Multigrade lubricant.
86.
Which of the following is/are the constituents of grease?
a)
Base oil.
b)
Additive.
c)
Thickness fibre.
d)
All of above.
87.
Identify liquid lubricant from the following
a)
Graphite
b)
Mo Disulphide
c)
Lubricating oil
d)
Soapstone
88.
Animal and Vegetable oil possess
a)
Good Oiliness
b)
Poor oiliness
c)
Optimum Oiliness
d)
None of the above
89.
Polymer,Metal solid,Carbon,Ceramic and cermet belongs to _____________ lubricant.
a)
Liquid Lubricant
b)
Semisolid Lubricant
c)
Gas Lubricant
d)
Solid Lubricant
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