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Questions and Answers
Which type of coupling requires the most precise shaft alignment during installation?
Which type of coupling requires the most precise shaft alignment during installation?
- Pivoted Coupling
- Universal Joint
- Rigid Coupling (correct)
- Flexible Coupling
What is the primary purpose of a timing belt in mechanical systems?
What is the primary purpose of a timing belt in mechanical systems?
- To provide a variable speed ratio between shafts.
- To maintain precise synchronization between rotating components. (correct)
- To absorb shock and vibration in the drivetrain.
- To transmit maximum power with minimal slippage.
A mechanic notices a 'belt squeal' during the operation of a belt drive system. What is the most likely cause?
A mechanic notices a 'belt squeal' during the operation of a belt drive system. What is the most likely cause?
- Normal belt operation
- Proper lubrication of the belt
- Loose belt or pulley misalignment (correct)
- Excessive belt tension
Which of the following tools is specifically designed for gripping and turning pipes?
Which of the following tools is specifically designed for gripping and turning pipes?
Which type of force acting on a shaft is caused by a load applied perpendicular to the shaft's axis?
Which type of force acting on a shaft is caused by a load applied perpendicular to the shaft's axis?
What is the primary advantage of using a flexible coupling over a rigid coupling in a shaft system?
What is the primary advantage of using a flexible coupling over a rigid coupling in a shaft system?
Which key is designed to seat in both the shaft and the hub, providing a strong connection?
Which key is designed to seat in both the shaft and the hub, providing a strong connection?
Which of the listed options is not a typical application of pliers?
Which of the listed options is not a typical application of pliers?
A technician observes that a flat belt is 'whipping' excessively during operation. What is the most probable cause of this issue?
A technician observes that a flat belt is 'whipping' excessively during operation. What is the most probable cause of this issue?
A mechanic needs to tighten a bolt with a hexagonal socket head. Which tool is specifically designed for this purpose?
A mechanic needs to tighten a bolt with a hexagonal socket head. Which tool is specifically designed for this purpose?
Flashcards
Spanner
Spanner
Tool to apply twisting force to tighten/release nuts, bolts, and fasteners.
Screwdriver
Screwdriver
Driving tool with a blade fitted to a handle, used to tighten or loosen screws.
Allen Key/Wrench
Allen Key/Wrench
Tool used to drive bolts and screws with hexagonal socket heads.
Pipe Wrench
Pipe Wrench
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Socket and Ratchet
Socket and Ratchet
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Shaft
Shaft
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Pliers
Pliers
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Flexible Coupling
Flexible Coupling
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Rigid Coupling
Rigid Coupling
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Belt Drive
Belt Drive
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Study Notes
- Spanners apply twisting force (torque) to tighten or release nuts, bolts, or threaded fasteners.
- Screwdrivers are driving tools with a blade fitted to a handle, used to tighten or loosen screws.
- Allen Keys/Wrenches drive bolts and screws with hexagonal socket heads.
- Pipe Wrenches grip and turn pipes and pipe fittings.
- Sockets and Ratchets are cylindrical tools with a square recess to drive nuts or bolts.
- Shafts are machine members, usually circular, for power transmission.
- Pliers are gripping tools mainly used to hold small components.
- Flexible Couplings connect rotating shafts, allowing for misalignment (3°) and movement, while transmitting torque and reducing vibration.
- Rigid Couplings connect two shafts, requiring perfect alignment (0°), transmitting power and rotation.
- Lateral/Parallel Misalignment refers to shafts not parallel to each other.
- Angular Misalignment refers to shafts not being at the same angle.
- Belt Drives transmit rotational power through a belt attached to pulley sheaves, tension and friction being important.
- Flat Belts are used in conveyors, compressors, machine tools, and heavy industrial equipment.
- Timing Belts maintain precise synchronization between rotating parts.
- V-Belts transmit power between pulleys, common in engines and machinery.
Classification of Hand Tools
- Fastening tools
- Cutting tools
- Measuring tools
Uses of Pliers (Standard Engineering Pliers or Combination Pliers)
- Holding a pipe
- Cutting steel wire
- Fitting split pins
- Stripping electrical wire
Types of Files
- Flat
- Triangular
- Square
- Round
Types of Screwdrivers
- Standard
- Spline
- Posidriv
- Phillips
Forces/Load Acting on Shaft
- Axial
- Radial
- Combination
Types of Couplings
- Solid/Rigid
- Flexible
- Pivoted
Symptoms of Premature Belt Failure
- Belt slippage
- Belt squeal
- Belt ticking or slapping
- Belt whipping
- Belts turned over
- Belt breakage
Types of Keys
- Sunk keys
- Saddle keys
- Tangent Keys
- Round Keys
- Splines
- Kennedy Keys
Types of Sunk Keys
- Rectangular Sunk Keys
- Square Sunk Keys
- Parallel Sunk Keys
- Gib Head Sunk Keys
- Feather Sunk Keys
- Woodruff Sunk Keys
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