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WorksheetsME8651_DTS_Unit Test-1
Total questions: 50
Worksheet time: 26mins
What is the system of this belt?
Open Belt System
Close Belt System
Advance Belt System
Multiple Belt system
What is Tc represented?
Tension at the tight side
Tension at the slack side
Centrifugal Tension
..........is used to transmit power from one shaft to another shaft by means of pulleys which rotates at a certain speed.
what is the best answer to fill in the blank?
Chain
Belt
Wire
Cloth
The daily application of the belt :
Treadmills
Swing
A car moves on road
A falling bridge
What is θ represent in finding the tension T2
Total length of the belt
Angle of contact
Speed of the belt
Tension at the slack side
the drive system shown in the figure is
belt drive
chain drive
gear drive
sprocket drive
In open belt,
One of the Pulley runs slower than other pulley
Both pulleys rotate in the same direction
Both pulleys rotate in opposite direction
The intermediate mechanisms which is used to transmit power from one place to another place
Pulley
Machine
Drive
Lever
The belt drive which is used with shafts arranged parallel and rotating in same direction
Cross belt drive
Open belt drive
The belt drive which is used with shafts arranged parallel and rotating in opposite direction
Cross belt drive
Open belt drive
This type of drive is used to change the speed of the driven shaft while the driving shaft runs at constant speed
Cone pulley drive
cross belt drive
open belt drive
Which of the following is not a material for belt drives
Leather
Balata
Rubber
Wood
The included angle for v belt drive ranges from
10 to 20 degree
20 to 30 degree
30 to 40 degree
Velocity ratio of a belt drive is the ratio of speed of
Driving pulley to driven pulley
Driven pulley to driving pulley
V belts are molded into
Circular shape
Triangular shape
Trapezoidal shape
None of the above
belts are acid proof and water proof and it is not effected by animal oils or alkalies.
Balata
Leather belts
Cotton or fabric belts
Rubber belt
_____________ Belt are used where distance between the shaft is less than 02 meters
Flat Belt
Round Belt
Vee Belt
Timing Belt
Round Belts are used where the distance between two shafts
5 - 10 meters
Less than 5 meters
less than 2 Meters
More than 5 meters
flat Belts are used where the distance between two shafts
less than 5 meters
less than 2 meters
5 – 10 meters
none of the above
Which of these belts are well suited for timing mechanisms?
Flat belt
V-belt
Synchronous belt
Multiple V-Belt
All types can be used
What is the drive misalignment called that results when the sheaves are at a different angle with the vertical plane?
Parallel misalignment
Horizontal angular misalignment
Vertical angular misalignment
Planar misalignment
Vertical parallel misalignment
Which parameters are represented by the two scales on a belt tension tester?
Deflection distance and belt span
Deflection force and belt type
Deflection force and belt width
Deflection distance and small sheave diameter
Deflection force and belt span
Power is transferred between an electric motor and a pump with a belt drive. Calculate the required driven sheave pitch diameter and belt length if the motor and pump shafts are 20 inches apart and the pump shaft must rotate at 1800 r/minute. The driving sheave is installed directly on the motor shaft and has a pitch diameter of 5 inches. The plate on the motor indicates a nominal speed of 1000 r/minute.
Driven sheave pitch diameter is 2.8 inches and belt length is 52.2 inches.
Driven sheave pitch diameter is 9 inches and belt length is 52.2 inches.
Driven sheave pitch diameter is 9 inches and belt length is 62 inches.
Driven sheave pitch diameter is 2.8 inches and belt length is 62 inches.
Impossible to tell from the given data
What should be used to clean belts?
A solvent
Soap and water
A glycerine/spirit mixture
Sandpaper
They should never be cleaned
for the system shown in the figure ( B) represent :
Driver Sheave
V belt
The pump
The shaft
the type of belt drive shown in the figure is :
Flat belt
V‐belt
Timing belt
Round belt
Ribbed belt
V-belt is used where a _____________ amount of power is to be transmitted
low
moderate
great
It is a way of transmitting mechanical power from one place to another which is common in motorcycles and bicycles.
Gear
Cam Follower
Belt
Chain Drive
The three basic components of a chain drive are?
Chain, roller, and pin
Chain, driver sprocket, and driven sprocket
Chain, master link, and roller
Pins, rollers, and bushings
Hoisting chain drives are operated at
High speed
Moderate speed
Low speed
The space between two link is known as
Chain thickness
Chain width
Link width
The space between two link is known as
Chain thickness
Chain width
Link width
Which of the following drive has no Slip
Belt Drive
Rope Drive
Chain Drive
None of the Above
The Power transmitted by a belt drive is
Where T1 and T2 are tensions in tight and slack side respectively
N- speed , V - Velocity
(T1 - T2) x N
(T1 + T2) x N
(T1 - T2) / V
(T1 - T2 ) x V
The stress Produced on the belt is..................
Tensile
Compressive
Shear
Bending
Spur Gears are used for connecting two..................
Parallel and Coplanar Shafts
Non Parallel and Coplanar Shafts
Parallel and non coplanar Shafts
Intersecting and Coplanar Shafts
Due to slip of the belt, the velocity ratio of the belt drive
Decreases
Increases
Does not change
None of the above
The cross section of V- belt is .............
Rectangular
Trapezoidal
Triangle
Circular
The power transmitted by the belt drive can be increased by
(A) Increasing the initial tension in the belt
(B) Dressing the belt to increase the coefficient of friction
(C) Increasing wrap angle by using idler pulley
(D) All of the above methods
Which one of the following is a positive drive?
(A) V-belt drive
(B) Rope drive
(C) Crossed flat belt drive
(D) Chain drive
The arms of the pulleys for flat belt drive have
(A) Elliptical cross-section
(B) Major axis in plane of rotation
(C) Major axis twice the minor axis
(D) All the three characteristics
The centrifugal tension in belts
(A) Decreases the power transmitted
(B) Increases the power transmitted
(C) Increase the wrap angle
(D) Increases the belt tension without increasing power transmission
In a horizontal flat belt drive, it is customary to use
(A) Bottom side of belt as slack side
(B) Top side of belt as slack side
(C) Idler pulley
(D) None of the above
The dedendum circle diameter is equal to (where φ = Pressure angle)
(A) Pitch circle diameter × cosφ
(B) Addendum circle diameter × cosφ
(C) Clearance circle diameter × cosφ
(D) Pitch circle diameter × sinφ
The contact ratio is the ratio of
(A) Length of arc of recess to the circular pitch
(B) Length of path of contact to the circular pitch
(C) Length of arc of contact to the circular pitch
(D) Length of arc of approach to the circular pitch
When the speed of belt increases,
(a) the coefficient of friction between the belt and pulley increases
(b) the coefficient of friction between the belt and pulley decreases
(c) the power transmitted will decrease
(d) the power transmitted will increase
The creep in the belt is due to
(A) Effect of temperature on belt
(B) Material of belt
(C) Unequal extensions in the belt due to tight and slack side tensions
(D) Stresses beyond elastic limit of belt material
The objective of ‘crowning’ of the flat pulleys of belt drive is to
(A) Prevent the belt from running off the pulley
(B) Increase the power transmission capacity
(C) Increase the belt velocity
(D) Prevent the belt joint from damaging the belt surface
The wire ropes make contact at
(A) Bottom of groove of the pulley
(B) Sides and bottom of groove of the pulley
(C) Anywhere in the groove of the pulley
(D) Sides of groove of the pulley
The ratio of driving tensions for flat belts, neglecting centrifugal tension, is (where T₁, and T₂ = Tensions on the tight and slack sides of belt respectively, μ = Coefficient of friction, between the belt and pulley, and θ = Angle of contact)
(A) T₁/T₂ = μθ
(B) log (T₁/T₂) = μθ
(C) T₁/T₂ =eμθ
(D) T₁/T₂ = log μθ
