Lifting Appliance MCQ Quiz - Objective Question with Answer for Lifting Appliance - Download Free PDF

The correct answer is 4) A is false, but R is true.

Key Points

• Assertion (A): Safety Principle in material handling aims at operational efficiency only.
  • This assertion is false because the safety principle in material handling does not aim solely at operational efficiency. It primarily focuses on ensuring the safety and well-being of the workers and preventing accidents and injuries.
  • Operational efficiency is an important aspect, but it is not the sole aim of safety principles. The overall goal is to create a safe working environment.
• Reason (R): Safety protocols ensure reduced accidents and injuries.
  • This reason is true because implementing safety protocols in material handling indeed helps in reducing accidents and injuries. Safety measures such as proper training, use of protective equipment, and adherence to safety guidelines play a critical role in minimizing risks.
  • By reducing accidents and injuries, safety protocols contribute to creating a safer and more productive work environment.

Additional Information

• Safety principles in material handling include the use of appropriate lifting techniques, proper maintenance of equipment, and awareness of potential hazards.
• Regular safety training and drills are essential to keep workers informed about the latest safety protocols and emergency procedures.
• Employers are responsible for providing a safe working environment and ensuring that safety protocols are strictly followed.

The correct answer is 1, 2 and 3 only.

Key Points

• Belt Conveyor: A belt conveyor consists of a belt that moves continuously over rollers or idlers. It is widely used for transporting bulk materials or packaged goods.
• Roller Conveyor: A roller conveyor uses rollers mounted in frames to transport materials. It is suitable for moving items with a flat bottom.
• Overhead Trolley Conveyor: This type of conveyor uses trolleys suspended from an overhead track to move materials. It is often used in assembly lines and warehousing.

Additional Information

• Hook Line Conveyor: While similar in concept to the overhead trolley conveyor, the hook line conveyor is not as commonly categorized as a primary type of conveyor in material handling.
• Conveyors play a crucial role in the automation of manufacturing and logistics operations by improving efficiency and reducing manual labor.
• Different types of conveyors are selected based on the nature of the materials to be handled, the required speed of movement, and other operational considerations.

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The correct answer is Both A and R are true, and R is the correct explanation of A.

Key Points

• The ergonomic principle in material handling focuses on human comfort and safety. This involves designing tasks, equipment, and work environments to fit the physical capabilities of workers.
• The aim of ergonomic principles is to reduce physical strain, which can lead to injuries, and to increase productivity by creating a safer and more comfortable work environment.
• Ergonomics addresses issues such as repetitive motion, heavy lifting, poor posture, and other factors that can cause strain or injury.
• By improving ergonomics, companies can reduce the number of workplace injuries and associated costs, while also enhancing worker efficiency and job satisfaction.

Additional Information

• Proper ergonomic design can prevent common workplace injuries such as carpal tunnel syndrome, tendonitis, and lower back injuries.
• Ergonomic interventions can include adjustable workstations, ergonomic tools and equipment, and employee training on safe work practices.
• Employers can conduct ergonomic assessments to identify risk factors and implement changes to improve the work environment.
• Regulatory bodies like OSHA (Occupational Safety and Health Administration) provide guidelines and recommendations for ergonomic practices in the workplace.

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The correct answer is Silos.

Key Points

• Silos are large storage structures designed to store bulk materials such as grains, coal, cement, carbon black, woodchips, and sawdust.
  • Silos are commonly used in agriculture to store grain or fermented feed known as silage.
  • Industrial silos can be used for storing cement, aggregates, and other bulk materials in the construction industry.
  • Silos help in protecting the stored materials from external environmental factors, ensuring their quality and usability.
  • They facilitate easy loading and unloading of bulk materials, thus enhancing operational efficiency.
  • Silos are designed in various forms such as tower silos, bunker silos, and bag silos, each serving specific storage needs.

Additional Information

• Silos are often equipped with temperature and moisture control systems to maintain the quality of the stored materials.
• They can be constructed from various materials, including steel, concrete, and wood, depending on the storage requirements.
• Modern silos come with automation features for monitoring and managing the stored materials efficiently.
• The design and capacity of silos can vary significantly based on the type of material to be stored and the required storage duration.

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The correct answer is 1 and 2 only.

Key Points

• Emergency Response Plans (ERP) should include spills, fire, and structural collapse.
  • Emergency Response Plans (ERP) are critical to ensure the safety and preparedness of the warehouse in the event of an emergency.
  • Including scenarios such as spills, fire, and structural collapse helps to cover a wide range of possible emergencies.
• All staff must be trained in first aid and PPE usage.
  • Training all staff in first aid ensures that immediate medical assistance can be provided in case of injury.
  • Training in Personal Protective Equipment (PPE) usage helps in minimizing the risk of injury during emergency situations.

Additional Information

• Structural inspections are not required after a shelving collapse is incorrect.
  • After a shelving collapse, it is essential to conduct structural inspections to ensure the integrity and safety of the remaining structure.
  • Neglecting inspections after such incidents could lead to further hazards and potential collapses.

Explanation:

Forklifts:

• The forklift is a small 4 -wheeled vehicle used for lifting loads and then shifting them to other locations in a factory
• The front of the machine has two steel lifting arms or forks
• In a fork-lift truck, the forks are attached to a column on the truck.
• Forks can be lifted to the desired height along with the materials (boxes etc.) on them and the material can be stacked at the proper place.
• Fork-lift trucks are used for short-distance (40 to 70 metres) travel and find indoor applications normally.
• So, fork-lift is used for lifting, lowering and vertical transportation.

               

Explanation:

Warehouse Lifting and Positioning Machines

• In a warehouse setting, various machines are designed to assist with the repetitive lifting and positioning of heavy loads. These machines are critical in improving efficiency, safety, and productivity in warehouse operations. Among the options provided, the Stacker is specifically designed for this purpose.

Stacker:

• A stacker is a specialized machine designed for the repetitive lifting and positioning of heavy loads in a warehouse setting. Stackers are typically used for stacking pallets, moving heavy goods, and organizing inventory within a warehouse. They come in various types, including manual, semi-electric, and fully electric stackers, each suited for different load capacities and operational requirements.

Working Principle:

• Stackers operate by using hydraulic or electric power to lift and lower loads. The operator positions the stacker forks under the pallet or load, and the hydraulic system raises the forks to the desired height. This allows for precise placement of goods on shelves or racks. The stacker can then be moved to another location to repeat the process, making it ideal for repetitive tasks.

Advantages:

• Increased Efficiency: Stackers allow for quick and efficient movement and placement of heavy loads, reducing the time and effort required for manual lifting.
• Improved Safety: Using a stacker minimizes the risk of injury associated with manual lifting and carrying of heavy loads, as the machine does the heavy lifting.
• Versatility: Stackers come in various sizes and configurations, making them suitable for different warehouse environments and load capacities.

Disadvantages:

• Cost: Depending on the type and capacity, stackers can be expensive to purchase and maintain.
• Training: Operators may require training to use stackers safely and effectively.

Applications:

• Stackers are commonly used in warehouses, distribution centers, and manufacturing facilities for tasks such as pallet stacking, order picking, and inventory management. Their ability to handle heavy loads with precision makes them indispensable in these environments

Explanation:

Conveyor Belt:

• A conveyor belt is a continuous moving band of rubber, fabric, or metal used in a variety of applications for transporting materials from one place to another.
• It is particularly effective for handling bulk materials over long distances, including inclined surfaces, making it a highly versatile and efficient material handling solution.
• A conveyor belt system operates on a simple principle where a belt, looped around two or more pulleys, is powered to move continuously.
• The belt carries materials placed on it from the loading point to the unloading point.
• The driving pulley is powered by an electric motor, causing the belt to move forward.
• The materials on the belt move with it, effectively transporting them from one location to another.
• When dealing with inclined distances, the belt is designed to grip the materials and prevent them from sliding back.

Applications: Conveyor belts are widely used in various industries, including mining, agriculture, automotive, food processing, and manufacturing, where they transport bulk materials like ores, grains, sand, coal, and packaged goods over long distances and varying elevations.

Explanation:

Crane hooks:

• A lifting hook is a device for grabbing and lifting loads by means of a device such as a hoist or a crane.
• A lifting hook is usually equipped with a safety latch to prevent the disengagement of the lifting wire rope sling, chain, or rope to which the load is attached.
• Generally crane hooks are made from wrought iron or steel.
• For heavy-duty crane hooks low alloy steels are used but the material is not the only factor behind its enormous load-bearing capacity.
• Steel grade, heat treatment, and forging are equally important to make a durable crane hook.
• Proper forging is very important. Forging provides better structural integrity than any other metal working process.
• It eliminates any kind of defects such as gas pockets or voids in the hook which can affect its long-term performance; thus increasing its strength, toughness, load-bearing capacity, and fatigue resistance.

 

• A four-wheel vehicle used for material handling is the industrial fork lift.
• Gasoline, propane or electric engines provide power to it.
• Heavy counter weights are fitted to the rear of the units.
• The front of the machine has two steel lifting arms or forks. The forks are spaced to balance the loads and are adjustable.
• It is used for lifting loads and shifting them to different places in a factory.

Chain slings are the most common type of slings used in lifting and rigging. Chain slings are used for lifting heavy items on construction sites such as: skip bins, concrete slabs, pipes, building materials etc.

Explanation:

Crane hook:

• A crane hook/lifting hook is a device for grabbing and lifting loads by means of a device such as a hoist or a crane.
• A lifting hook is usually equipped with a safety latch to prevent the disengagement of the lifting wire rope sling, chain, or rope to which the load is attached.
• A hook may have one or more built-in pulley sheaves as a block and tackle to multiply the lifting force.
• Crane hooks are applied in industries for picking and transporting heavy loads.
• Crane hooks are designed to be connected usually to a rope wound over a pulley controlled by an electric motor.
• Crane hooks undergo rigorous stress at the time of loading.
• Usually loading is applied at the bottom most inner curve of the hook that distributes the induced stress to the remaining section of the hook.
• In this work, analysis is done by varying the shape of the cross-section of the hook with a constant static load in it.
• Some common materials used to make the crane hook are Carbon steel (Mild steel), Alloy steel, Wrought iron, HSLA (High-Speed Low Alloy), Chromium steel, Stainless steel, and Gray cast iron.
• The material selected should have very high strength, hardness, and some other mechanical properties to meet load requirements such as work hardening.

 

Explanation:

Hoist:

• A hoist is a device used for lifting or lowering a load by means of a drum or lift wheel around which rope or chain wraps.
• It may be manually operated, electrically, or pneumatically driven and may use chain, fiber, or wire rope as its lifting medium.
• The modern automobile service stations use various types of equipment to lift vehicles.
• They are as follows:
  • Single post hydraulic car hoist
  • Two post-car hoist
  • Four post-car hoist
  • Engine hoist
  • Jacks
  • Stands

Single post hydraulic car hoist:

• It facilitates the servicing and reaper works conveniently.
• It is constructed for dependable, trouble-free performance and ensures smooth and safe operation.
• The post is made of high-grade steel.
• The car hoists are specially designed for resistance to wear and damage during water wash.
• Single post type is suitable for the vehicle up to 6 tonnes.

Two post hoist:

• It is operated by an electro-hydraulic system.
• It is easy to operate and maintain the double post hoist and safety provisions are also provided to hold the vehicle.
• Double post type is suitable for vehicles up to 4 tones.

Explanation:

Forklifts:

• The forklift is a small 4 -wheeled vehicle used for lifting loads and then shifting them to other locations in a factory
• The front of the machine has two steel lifting arms or forks
• In a fork-lift truck, the forks are attached to a column on the truck.
• Forks can be lifted to the desired height along with the materials (boxes etc.) on them and the material can be stacked at the proper place.
• Fork-lift trucks are used for short-distance (40 to 70 metres) travel and find indoor applications normally.
• So, fork-lift is used for lifting, lowering and vertical transportation.

               

Lifting and moving of loads by hoisting equipment is a rigging operation. In rigging many types of hoisting equipment are like hoists, derricks and cranes are employed.

Chain hoist

• It is most widely used device for lifting loads.
• Chain hoists are dependable and usually portable.

Three basics types of chain hoist are

• Differential hoist
• Screw Geared hoist
• Spur Geared hoist

Fork lift

• The fork lift is a small 4 – wheeled vehicle.
• Gasoline, propane or electric engines provide power to it.
• Heavy counterweights are fitted to the rear of the units.
• The front of the machine has two steel lifting arms or forks.
• The forks are spaced to balance the load and are adjustable.
• It is used for lifting loads and shifting them to different places in a factory.

Jib crane

• It is useful for many different rigging jobs.
• This can be used to move a load horizontally to and from the base and the end of the boom.