Question 1

For a part revolution mechanical power press used with hands-in-the-dies feeding and equipped with two hand controls,does the OSHA standard permit an alternative to having a brake monitor and control system on the press? If so,what is this alternative?

Accepted Answer

The answer of For a part revolution mechanical power press...

Question 2

A mechanical power press equipped with brake and clutch has a stopping time of .3 seconds.

a.Calculate the minimum distance for placement of a presence sensing device.

b. Calculate the minimum distance for placement of a two-hand control device.

Accepted Answer

The answer of A mechanical power press equipped with brake...

Question 3

For a part revolution mechanical power press used with hands-in-the-dies feeding and equipped with a Type B gate,does the OSHA standard permit an alternative to having a brake monitor and control system on the press? If so,what is this alternative?

Accepted Answer

The answer of For a part revolution mechanical power press...

Question 4

For which of the following would a brake monitor and control system be required for applications in which the operator places his or her hands in the dies for feeding the press?

Accepted Answer

Part revolution mechanical forming presses require a brake monitor and control system for applications where the operator places his or her hands in the dies for feeding the press. This is because these presses can stop at any point in their cycle, making it crucial to monitor and control the brake to ensure the safety of the operator.

Question 5

Which of the following is least effective on a full-revolution press?

Accepted Answer

A brake monitor and control system is least effective on a full-revolution press because it primarily serves to monitor and control the stopping time and performance of the press brake, rather than directly preventing operator access to hazardous areas during operation. Die enclosure guards, pullbacks, and fixed barriers are physical guarding methods that provide more direct protection against operator injury by preventing access to dangerous areas of the machine.

Question 6

For full revolution presses with flywheel speeds of 75 rpm,calculate the mathematical limit for the minimum possible safety distance permissible for two hand trips,regardless of the design of the engagement mechanism.

Accepted Answer

The answer of For full revolution presses with flywheel speeds...

Question 7

Under what circumstances is a "normal limit reasonably established by the employer" required for top-stop overrun?

Accepted Answer

The answer of Under what circumstances is a "normal limit...

Question 8

A mechanical power press, having a flywheel speed of 75 rpm and equipped with a brake and clutch, has a stopping time of .4 seconds.

a. Calculate the minimum distance for placement of a presence sensing device.

b. Calculate the minimum distance for placement of a two-hand control device.

c. Calculate the minimum distance for placement of a two-hand trip device.

Accepted Answer

The answer of A mechanical power press, having a flywheel...

Question 9

Under what circumstances is a full revolution mechanical power press required to have a brake monitor and control system?

Accepted Answer

The answer of Under what circumstances is a full revolution...

Question 10

For which of the following would a brake monitor and control system be required for applications in which the operator places his or her hands in the dies for feeding the press?

Accepted Answer

A brake monitor and control system would be required for a part revolution press with a type B gate, as this type of gate allows the operator to enter the die area and places their hands in the press during operation. The brake monitor and control system would detect any hands or objects in the die area and stop the press before any injuries or accidents occur. The other options either have a different type of guard or do not require the operator to place their hands in the die area, therefore a brake monitor and control system would not be necessary.

Question 11

A "14-PT Niagara" is a full revolution press with 14 engagement points on the flywheel.Suppose that this press has a flywheel speed of 50 rpm.Calculate the safety distance for two-hand trips.
60 sec/min

Accepted Answer

The answer of A "14-PT Niagara" is a full revolution...

Question 12

Which of the following is least effective on a full-revolution press?

Accepted Answer

A presence sensing device is the most effective option on a full-revolution press because it can detect when an operator or object enters the hazardous area and stop the press. A die enclosure guard and fixed barriers are also effective, but they only prevent access to the hazardous area and do not detect when someone or something enters it. Pullbacks can be used on certain types of presses, but they are not effective on full-revolution presses as they can only be used on machines that do not cycle continuously.

Question 13

A manufacturing engineer is considering purchase of a mechanical, full revolution, punch press for a high-efficiency workstation. You are asked to compute an appropriate safety distance for a two-hand trip safeguarding device for this machine.

a. What additional design specifications for this machine would you need before responding to the manufacturing engineer's problem?

b. What would be your response? (You may assume any arbitrary value(s) for data you listed in part (a) above as necessary to solve this problem.)

Accepted Answer

The answer of A manufacturing engineer is considering purchase of...

Question 14

For a part revolution mechanical power press used with hands-in-the-dies feeding and equipped with a presence sensing device,does the OSHA standard permit an alternative to having a brake monitor and control system on the press? If so,what is this alternative?

Accepted Answer

The answer of For a part revolution mechanical power press...

Question 15

For a part revolution mechanical power press used with hands-in-the-dies feeding and equipped with a Type A gate,does the OSHA standard permit an alternative to having a brake monitor and control system on the press? If so,what is this alternative?

Accepted Answer

The answer of For a part revolution mechanical power press...

Question 16

Which of the following is most effective on a full-revolution press?

Accepted Answer

Die enclosure guards are most effective on full-revolution presses because they physically prevent the operator's hands or fingers from entering the point of operation by enclosing the dangerous area of the machine.

Question 17

Suppose that two hand trips are installed on a clutch-activated,part revolution press,the trips being incapable of triggering a brake to interrupt a stroke mid-cycle.If the flywheel speed is 120 rpm,calculate the safety distance for the two-hand trips.

Accepted Answer

The answer of Suppose that two hand trips are installed...

Question 18

A manufacturing engineer is considering purchase of a mechanical, full revolution, punch press for a high-efficiency workstation. You are asked to compute an appropriate safety distance for an infrared barrier safeguarding device for this machine.

a. What additional design specifications for this machine would you need before responding to the manufacturing engineer's problem?

b. What would be your response? (You may assume any arbitrary value(s) for data you listed in part (a) above as necessary to solve this problem.)

Accepted Answer

The answer of A manufacturing engineer is considering purchase of...

Question 19

Which press is full revolution?

Accepted Answer

The answer of Which press is full revolution?

...

Question 20

The machine pictured is

Accepted Answer

The answer of The machine pictured is
...

Quiz 15: Machine Guarding

For a part revolution mechanical power press used with hands-in-the-dies feeding and equipped with two hand controls,does the OSHA standard permit an alternative to having a brake monitor and control system on the press? If so,what is this alternative?

A mechanical power press equipped with brake and clutch has a stopping time of .3 seconds. a.Calculate the minimum distance for placement of a presence sensing device. b. Calculate the minimum distance for placement of a two-hand control device.

For a part revolution mechanical power press used with hands-in-the-dies feeding and equipped with a Type B gate,does the OSHA standard permit an alternative to having a brake monitor and control system on the press? If so,what is this alternative?

For which of the following would a brake monitor and control system be required for applications in which the operator places his or her hands in the dies for feeding the press?

Which of the following is least effective on a full-revolution press?

For full revolution presses with flywheel speeds of 75 rpm,calculate the mathematical limit for the minimum possible safety distance permissible for two hand trips,regardless of the design of the engagement mechanism.

Under what circumstances is a "normal limit reasonably established by the employer" required for top-stop overrun?

Under what circumstances is a full revolution mechanical power press required to have a brake monitor and control system?

For which of the following would a brake monitor and control system be required for applications in which the operator places his or her hands in the dies for feeding the press?

A "14-PT Niagara" is a full revolution press with 14 engagement points on the flywheel.Suppose that this press has a flywheel speed of 50 rpm.Calculate the safety distance for two-hand trips. 60 sec/min

Which of the following is least effective on a full-revolution press?

For a part revolution mechanical power press used with hands-in-the-dies feeding and equipped with a presence sensing device,does the OSHA standard permit an alternative to having a brake monitor and control system on the press? If so,what is this alternative?

For a part revolution mechanical power press used with hands-in-the-dies feeding and equipped with a Type A gate,does the OSHA standard permit an alternative to having a brake monitor and control system on the press? If so,what is this alternative?

Which of the following is most effective on a full-revolution press?

Suppose that two hand trips are installed on a clutch-activated,part revolution press,the trips being incapable of triggering a brake to interrupt a stroke mid-cycle.If the flywheel speed is 120 rpm,calculate the safety distance for the two-hand trips.

Which press is full revolution?

The machine pictured is