Mobile Machinery Safety Standards

Questions and Answers

What was one of the main modifications made to the title of the standard?

It conformed to the format of International Standards. (correct)

It was shortened for clarity.

It included additional specifications.

It changed the subject area entirely.

Which type of agricultural machinery does this standard apply to?

Only agricultural tractors.

Only pedestrian-operated machines.

Only self-propelled machines.

Agricultural tractors and other related machines. (correct)

What was referenced during the formulation of this standard for operations controls?

National safety protocols for machinery.

Philippine local government regulations.

International Organization for Standardization (ISO) 3789-2:1982. (correct)

Regional agricultural guidelines.

What aspect of the standard was technically revised according to PNS 01:Part 4:1998?

The structure and drafting rules. Signup and view all the answers

Which aspect was not specifically mentioned as a change in the standard?

Addition of new machinery types. Signup and view all the answers

What requirement must be met if a towing machine is equipped with a hitch hook?

The towed machine must have a drawbar eye according to ISO 5692. Signup and view all the answers

Which of the following measurements is specified for the diameter of the drawbar hole?

33 mm Signup and view all the answers

What must be done to ensure the stability of machines that are not stable when disconnected?

They must have a jack or other support to prevent tilting. Signup and view all the answers

What is the maximum thickness allowed for a drawbar according to the specifications?

32 mm Signup and view all the answers

When is a jack required for trailers of unladen mass exceeding 500 kg?

When the trailer is unladen. Signup and view all the answers

What is the required minimum base size for a jack used to support the drawbar?

It must be adequate to prevent sinking into soft ground. Signup and view all the answers

What is the significance of the downward force acting through the drawbar when measured stationary?

It must not exceed 250 N for any machine. Signup and view all the answers

Where should the drawbar be located on a tractor?

In the longitudinal mid-plane of the tractor. Signup and view all the answers

What is the minimum safety distance required from a guard when dimension 'a' is set at 2400 mm and dimension 'b' is at 2000 mm?

350 mm Signup and view all the answers

If dimension 'a' is 1800 mm, which of the following is the safety distance when 'b' is 2200 mm?

600 mm Signup and view all the answers

Which safety distance applies when 'a' is 1600 mm and 'b' is 1000 mm?

1000 mm Signup and view all the answers

What happens to safety distances as dimensions 'a' and 'b' decrease below 1000 mm?

Values of b below 1000 mm do not increase the reach. Signup and view all the answers

Which combination of dimensions 'a' and 'b' results in a safety distance of 900 mm?

a = 1000 mm, b = 1400 mm Signup and view all the answers

At what values of 'a' and 'b' is a safety distance of 1300 mm required?

a = 800 mm, b = 1200 mm Signup and view all the answers

Which dimension pair requires a safety distance of 1100 mm?

a = 2000 mm, b = 1000 mm Signup and view all the answers

When 'a' is at its minimum, what is the safety distance when 'b' is 1400 mm?

600 mm Signup and view all the answers

What is the preferred motion to apply a hand-operated brake?

Pull motion Signup and view all the answers

What feature is required for parking brake devices?

Retention in applied position Signup and view all the answers

What should be possible with independent right and left-hand brake controls?

They should allow combined control without undue deviation. Signup and view all the answers

Which brake operation provides convenience for the operator based on the content?

Both hand-operated and foot-operated brakes Signup and view all the answers

What is a characteristic of a parking brake's retaining device?

Must retain brakes when applied Signup and view all the answers

What is the main concern regarding the deviation of the vehicle's path when using combined brake controls?

Minimizing undue deviation Signup and view all the answers

What is most likely the ideal location for brake controls on wheeled tractors?

Convenient to the operator Signup and view all the answers

What is a requirement when separate brake pedals are provided?

They must allow combined control for straight travel. Signup and view all the answers

What is the correct operation for increasing engine speed using the throttle lever?

Push the lever forward Signup and view all the answers

Which safety provision is required for the operation of the inertia type starter mechanism?

The traction transmission must be in neutral or park position Signup and view all the answers

Where should the recoil starter handle be located to ensure safe operation?

In a position that cannot be operated from the front Signup and view all the answers

How should the spark ignition control be operated to turn the system off?

Rotate the ignition switch counter-clockwise Signup and view all the answers

What action should be taken to decrease engine speed using the throttle lever?

Pull the lever to the rear Signup and view all the answers

What is the function of the turning handle during operation?

To accelerate the engine by turning counter-clockwise Signup and view all the answers

What should operators ensure before releasing the inertia mechanism?

The traction transmission is in neutral or park Signup and view all the answers

Which position should the throttle lever reach to stop the engine?

Extreme rearward position Signup and view all the answers

Study Notes

Safety Distances for Guards

Safety distance requirements for moving parts are outlined in a table format indicating various dimensions (a, b, c) in millimeters.
Distances from dangerous moving parts vary depending on the height of the component (a), ranging from 100 to 1100 mm for different configurations.

Hitches for Mobile Machines

Non-self-propelled mobile machines must be equipped with suitable hitch devices for towing purposes.
Hitch hook requirements are defined by ISO 6489-1, while towed machines must have drawbar eyes that meet ISO 5692 specifications.
Drawbars should be centrally located on the tractor with specific dimensions for diameter and thickness to ensure stability.

Jacks and Supports for Stability

Machines that lack stability when disconnected need an attached jack or support to prevent tilting.
Jacks must be secured to the machine and properly sized to avoid sinking in soft ground, particularly for trailers over 500 kg or other machines with significant downward force.
Downward force specifications are defined when the machine is stationary on horizontal ground with specific height requirements.

International Standards Compliance

The document aligns with Philippine National Standards and incorporates feedback from public hearings for revisions, ensuring conformity with international standards.
Modification includes improved operational methods and sentence structure to enhance clarity and understanding.

Operator Controls for Agricultural Machinery

The standard applies to various agricultural equipment, including tractors and pedestrian-operated machines, focusing on control locations and methods of operation.
Separate brake pedals on wheeled tractors must allow combined control to maintain a straight path during operation.

Control Locations and Operations

Hand-operated controls must be conveniently located for the operator, with a preference for pull motions for application.
Parking brakes must have a retention device to prevent accidental release while being easily accessible.

Stop and Speed Controls

Spark ignition controls must be easily reachable, with specific operational requirements for both hand and foot-operated controls to stop and start the engine.
Throttle lever operations allow for increasing or decreasing engine speed based on the operator's input.

Safety Features

Recoil starters should be designed for safe operation, and inertia mechanisms must not be releasable under specific conditions to ensure control during operation.

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Description

This quiz covers essential safety distances required for guards on moving parts, hitch device specifications for mobile machines, and proper jacking methods for stability. Understand the importance of complying with ISO standards to ensure safe operation and prevent accidents.