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WorksheetsEmd Unit 3 mcq Quiz
Total questions: 50
Worksheet time: 25mins
The pulley which is keyed to the rotating shaft is known as _____.
Driven pulley
Driver pulley
Idler pulley
Counter pulley
The pulley which is keyed to the shaft which is to be rotated is known as _____.
Driver pulley
Driven pulley
Counter pulley
Step pulley
The types of belts are _____.
Flat belt, V-belt and Circular belt
Rope, Chain and Gear belt
Open belt, Cross belt and Fast belt
Leather belt, Rubber belt and Cotton belt
The cross section of the flat belt is _____.
Rectangular
Circular
Trapezoidal
Square
Flat belt connects the pulleys which are at a distance up to _____.
5 m
10 m
15 m
20 m
The cross section of V–belt is _____.
Trapezoidal
Rectangular
Circular
Square
_____ belt is suitable for transmission of power for short centre distance.
Flat belt
V-belt
Rope belt
Circular belt
The best leather belts are made from _____.
Skin of male ox
Skin of buffalo
Skin of camel
Skin of cow
Say true or false: The hair side of the leather is smoother than the flesh side.
True
False
Partially true
None of these
In leather belts, _____ side should be in contact with the pulley surface.
Hair side
Flesh side
Either side
None
In leather belts, each layer is known as a _____.
Ply
Strip
Leaf
Layer
The belts mostly used in farm machinery are _____.
Cotton or fabric belts
Leather belts
Rubber belts
Plastic belts
_____ belts are used where the shafts are very near to each other.
V-belts
Flat belts
Circular belts
Rope belts
The angle of contact of the belt on smaller pulley is usually _____.
Less than 180°
Equal to 180°
More than 180°
90°
Idler pulley is used for _____.
Increasing speed
Changing direction of belt
Power transmission
Reducing slip
The belt drive in which power is transmitted by friction between belt and pulley is called _____.
Open belt drive
Cross belt drive
Friction drive
Fast and loose pulley drive
When the shafts are arranged parallel and rotate in opposite directions, the drive used is _____.
Open belt drive
Cross belt drive
Rope drive
Gear drive
The slip in belt drive is expressed as a percentage of _____.
Speed of driver
Speed of driven
Mean speed of driver and driven
Velocity ratio
The maximum power is transmitted by a belt when centrifugal tension is equal to _____.
One-third of maximum tension
Half of maximum tension
Maximum tension
Two-third of maximum tension
The condition for maximum power transmission in belt drive is _____.
T = 3Tc
Tc = T/3
T = Tc
T = 2Tc
The centrifugal tension in the belt is given by _____.
Tc = mv²
Tc = T/mv²
Tc = m²v
Tc = T – mv²
The velocity ratio of a belt drive is the ratio of _____.
Speed of driver to speed of driven
Speed of driven to speed of driver
Tensions in the belt
Diameter of pulleys
Crowning of pulleys is provided to _____.
Increase belt strength
Avoid slipping of belt
Prevent belt from running off
Increase friction
The belt drive used for long distance between two shafts is _____.
Rope drive
V-belt drive
Chain drive
Gear drive
The ratio of driving tensions in a belt drive is expressed by _____.
e^(μθ)
e^(θ/μ)
μθ
2μθ
In belt drives, creep occurs due to _____.
Unequal stretching of belt
High speed of belt
Large pulley diameter
Centrifugal tension
The arc of contact on the smaller pulley is denoted by _____.
θ
μ
T
D
The thickness of belt depends upon _____.
Power transmitted
Diameter of pulley
Speed of belt
All of these
The initial tension in the belt helps to _____.
Increase power transmission
Avoid slip
Maintain proper grip on pulleys
All of these
The velocity of a belt is usually restricted to _____.
10 m/s
15 m/s
20 m/s
25 m/s
When both driver and driven rotate in the same direction, the drive used is _____.
Cross belt drive
Open belt drive
Compound drive
Fast and loose drive
In fast and loose pulley drive, the loose pulley runs freely on the shaft with the help of _____.
Bearing
Bush
Sleeve
Key
The velocity ratio of a belt drive is also known as _____.
Speed ratio
Power ratio
Torque ratio
Tension ratio
In a belt drive, the slip reduces the _____.
Velocity ratio
Torque
Power transmitted
All of these
The expression T₁/T₂ = e^(μθ) is known as _____.
Law of belting
Ratio of tensions
Law of machine
Ratio of friction
The belt drive used where shafts are far apart and high power is to be transmitted is _____.
Rope drive
Chain drive
V-belt drive
Gear drive
The belt drive in which one pulley is fixed and the other is free on shaft is called _____.
Fast and loose pulley drive
Compound drive
Step pulley drive
Open drive
Which of the following is not a type of flat belt joint?
Cemented joint
Laced joint
Hinged joint
Welded joint
The thickness of belt is generally in the range of _____.
2–5 mm
5–15 mm
15–25 mm
25–30 mm
A multiple V-belt drive is also known as _____.
Rope drive
Wedge drive
Circular drive
Flat drive
The maximum stress induced in the belt is equal to _____.
Maximum tension / Cross-sectional area
Ratio of tensions
μ × θ
None of these
The slip between driver and driven in belt drive reduces the _____.
Velocity ratio
Power transmitted
Efficiency of drive
All of these
In flat belts, the maximum permissible stress is of the order of _____.
2 MPa
3 MPa
5 MPa
10 MPa
In V-belts, the maximum permissible stress is of the order of _____.
2 MPa
5 MPa
7 MPa
10 MPa
Which type of belt is used for synchronous drive?
Flat belt
V-belt
Timing belt
Rope belt
The belt speed is limited by _____.
Centrifugal tension
Initial tension
Angle of lap
Arc of contact
The creep in belt drive results in _____.
Loss of power
Increase in power
No effect
Increase in velocity ratio
The power transmitted by a belt is directly proportional to _____.
Velocity of belt
Square of velocity of belt
Cube of velocity of belt
None of these
The slip in belt drive is generally in the range of _____.
1–2 %
2–5 %
5–10 %
10–15 %
In V-belts, the angle between sides of groove is usually _____.
20°–30°
30°–40°
40°–45°
60°–70°
