Question 1

When a machine is being operated without the safeguard, which of the following actions should be taken?
A) Stop machine immediately
B) Report to management next day
C) Show caution while machine is operating
D) Discuss at next safety meeting.

Accepted Answer

The best action to take when a machine is being operated without a safeguard is to immediately stop the machine to prevent any potential accidents or injuries. Safety should always be the top priority, and continuing to operate a machine without proper safety measures in place is extremely hazardous. Reporting to management and discussing safety measures can be done after the machine has been stopped and the immediate danger has been eliminated.

Question 2

Fixed guards provide a temporary barrier between workers and the point of operation.

Accepted Answer

Fixed guards are a permanent form of protection designed to provide a barrier between workers and the point of operation, hazardous parts, or areas of a machine.

Question 3

The National Safety Council defines safeguarding as minimizing the risk of accidents.

Accepted Answer

The National Safety Council defines safeguarding as a set of measures taken to minimize the risk of accidents or injury in the workplace, which includes physical safeguards such as barriers and guards, administrative controls such as training and procedures, and personal protective equipment.

Question 4

The best guard used in a robot's work envelope is which of the following?
A) Photoelectric device
B) Pullback device
C) Electromechanical device
D) Physical barrier

Accepted Answer

A physical barrier is the best choice for guarding a robot's work envelope as it creates a physical separation between the operator and the hazardous robot. This prevents accidental contact and injury. Photoelectric, pullback, and electromechanical devices may be useful in certain situations but they do not provide the same level of protection as a physical barrier.

Question 5

The most common mechanical injuries are cutting and tearing, shearing, crushing, breaking, straining, spraining, and puncturing.

Accepted Answer

These are indeed the most common mechanical injuries that occur in a variety of settings such as workplaces, sports, and accidents.

Question 6

A Permanent Electrical Safety Device (PESD) becomes a real safety device only after it is installed as part of a Lockout/Tagout procedure. Until this is done it is nothing but another electrical component.

Accepted Answer

A Permanent Electrical Safety Device (PESD) is designed to enhance safety in electrical systems but it is not considered a true safety device until it is incorporated into a Lockout/Tagout procedure. This procedure ensures that the electrical system is properly de-energized and locked or tagged to prevent accidental re-energization during maintenance or repair work. Once a PESD is installed as part of the Lockout/Tagout procedure, it can provide an additional layer of protection against electrical hazards.

Question 7

The concept of risk assessment is the process of quantifying the level of risk associated with the operation of a given machine.

Accepted Answer

Risk assessment involves evaluating potential hazards and determining their likelihood and severity to establish the level of risk associated with a particular activity or operation. This process aims to identify and quantify risks, prioritize them, and develop strategies to eliminate or mitigate them. In the case of machine operations, risk assessment is essential to ensure the safety of the workers, protect the machinery and equipment, and prevent accidents and injuries. Therefore, the statement is true.

Question 8

When a body part comes in contact with a sharp edge, which of the following occurs?
A) Crushing
B) Puncturing
C) Shearing
D) Cutting

Accepted Answer

When a body part comes in contact with a sharp edge, a cutting injury occurs. This is because the sharp edge slices through the tissue rather than crushing it, puncturing it, or shearing it.

Question 9

Machine guards must meet only one overriding requirement: prevention of contact with moving parts.

Accepted Answer

Machine guards must also ensure that they do not create any new hazards, allow for safe lubrication of machinery parts, and do not interfere with machine operation, in addition to preventing contact with moving parts.

Question 10

Guards are not effective when used at the point of operation.

Accepted Answer

Guards are specifically designed to be effective at the point of operation by preventing access to dangerous areas, thereby protecting workers from injury.

Question 11

Concerns about mechanical hazards have only become important in recent years.

Accepted Answer

Mechanical hazards have been a concern for a long time, including in fields such as manufacturing, construction, and agriculture. Standards and regulations addressing these hazards have also been in place for decades in many countries.

Question 12

An optical device that shuts down the machine any time the light field is broken is which of the following?
A) Photoelectric device
B) Electromechanical device
C) Pullback device
D) Radio-frequency device

Accepted Answer

A photoelectric device works by emitting a light beam and detecting when that beam is interrupted, which can trigger a shutdown of the machine it is connected to. This makes it an effective safety device for preventing accidents or damage to equipment. Electromechanical devices use electrical signals to control mechanical actions, which isn't quite the same as detecting light fields. Pullback devices are used in saws and other machines to prevent accidents caused by kickback or other unexpected movements. Radio-frequency devices use electromagnetic waves for various purposes, but they aren't typically used for safety shutdowns.

Question 13

The best robot safeguard is roping off the work area.

Accepted Answer

Roping off the work area is one of the best ways to ensure that humans do not accidentally get too close to the robot and get injured. However, it is important to note that there are other measures like emergency stop buttons, safety sensors, and good training for workers that also play a crucial role in robot safety.

Question 14

Which type of guard shuts down the machine when the guard is not securely in place?
A) Fixed
B) Interlock
C) Adjustable
D) Point

Accepted Answer

An interlock guard is designed to shut down the machine when the guard is not securely in place, making it the best choice for this scenario. Fixed guards are permanently attached to the machine and do not include any type of shutdown mechanism. Adjustable guards can be moved to accommodate different types of machinery, but also do not have a shutdown feature. Point guards cover specific areas of the machine and may not provide comprehensive protection.

Question 15

In an industrial setting, people interact with machines that are designed to drill, cut, stamp, punch, and shape such materials as metal, plastics, and elastomers.

Accepted Answer

This statement is true. Industrial machines are used for various purposes including drilling, cutting, stamping, punching, and shaping materials like metal, plastics, and elastomers.

Question 16

Permanent electrical safety devices can improve the effectiveness of lockout/tagout programs.

Accepted Answer

Permanent electrical safety devices, such as circuit breakers and interlocks, can help to prevent unexpected release of hazardous energy and improve the effectiveness of lockout/tagout programs. They can be used as an additional layer of protection to ensure that equipment remains de-energized during maintenance or repair work.

Question 17

Three types of point of operation guards are fixed, interlocked, and adjustable.

Accepted Answer

This statement is true. There are three types of point of operation guards - fixed guards, interlocked guards, and adjustable guards.

Quiz 10: Mechanical Hazards and Machine Safeguarding

When a machine is being operated without the safeguard, which of the following actions should be taken?