Deck 15: Machine Guarding

Question 1

5.Which of the following types of presses require point of operation safeguarding?

A)full revolution,hands-in
B)full revolution,hands-out
C)part revolution,hands-in
D)all of the above

Answer 1

D

Question 2

3.Which of the following safeguarding strategies is prohibited for a full-revolution press?

A)die enclosure guard
B)Type B gate
C)Type A gate
D)presence-sensing device

Answer 2

D

Question 3

16.To comply with OSHA standards for mechanical power presses,automatic feeding is an alternative to safeguarding the point of operation.

Answer 3

False

Question 4

10.Which of the following point of operation safeguarding methods is most appropriate for presses that employ automatic feeding of coils of strip stock and automatic ejection of the finished parts?

A)tongs
B)brake monitor and control system
C)fixed barrier
D)pullbacks

Question 5

17.A legal alternative to safeguarding the point of operation on a mechanical power press is to employ hand feeding tools.

Question 6

14.Which of the following alternatives is suggested for an interlocked barrier guard when hand feeding is to be used for feeding a punch press?

A)fixed barrier guard
B)die enclosure guard
C)brake monitor and control system
D)gate device

Question 7

4.Which of the following types of presses requires brake monitors and control systems?

A)full revolution,hands-in,2-hand trip
B)full revolution,hands-out,2-hand trip
C)part revolution,hands-in,2-hand control
D)all of the above

Question 8

6.Which of the following devices does not qualify as an OSHA-acceptable method of safeguarding the point of operation of mechanical power presses?

A)pull-outs (pull-backs)
B)sweeps
C)two-hand controls
D)interlocked barrier guards

Question 9

7.Label the figure with the OSHA specified gaps.

Question 10

13.What similar alternative is suggested for an interlocked barrier guard when hand feeding is to be used for feeding a punch press?

Question 11

11.Which of the following point of operation safeguarding methods is most appropriate for presses that employ automatic feeding of coils of strip stock and automatic ejection of the finished parts?

A)awareness barrier
B)top stop limit device
C)anti-repeat
D)fixed barrier

Question 12

18.A legal alternative to safeguarding the point of operation on a mechanical power press is to employ anti-repeat devices.

Question 13

8.What type of safeguard for the point of operation is convenient for presses that employ automatic feeding of coils of strip stock and automatic ejection of the finished parts?

Question 14

2.Which of the following qualifies as a means of safeguarding the point of operation of a mechanical power press?

A)adjustable barrier
B)awareness barrier
C)hand-feeding tool
D)sliding bolster

Question 15

15.Which of the following alternatives is suggested for an interlocked barrier guard when hand feeding is to be used for feeding a punch press?

A)anti-repeat
B)Type A gate
C)friction clutch
D)manual override

Question 16

12.Which of the following point of operation safeguarding methods is most appropriate for presses that employ automatic feeding of coils of strip stock and automatic ejection of the finished parts?

A)die feeding devices
B)brake monitor and control system
C)fixed barrier
D)awareness barrier

Question 17

19.A legal alternative to safeguarding the point of operation on a mechanical power press is to employ a top stop limit.

Question 18

1.Which of the following describes the motion of a Type A gate?

A)gate goes down,ram goes down,gate goes up,ram goes up
B)gate goes down,ram goes down,ram goes up,gate goes up
C)gate goes down and stays down until the setup supervisor releases it
D)none of the above

Question 19

20.A legal alternative to safeguarding the point of operation on a mechanical power press is to employ a brake monitor and control system.

Question 20

9.Which of the following point of operation safeguarding methods is most appropriate for presses that employ automatic feeding of coils of strip stock and automatic ejection of the finished parts?

A)awareness barrier
B)fixed barrier
C)presence sensing device
D)two-hand controls

Question 21

35.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?

Question 22

25.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.

Question 23

34.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?

Question 24

31.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)flywheel punch press with a four-point positive engagement
B)part revolution mechanical forming press
C)hydraulic press for deep-drawing
D)press brake

Question 25

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

A)die enclosure guard
B)pullbacks
C)fixed barrier
D)brake monitor and control system

Question 26

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.

Question 27

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

Question 28

26.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.

Question 29

number of engagement points
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. )

Question 30

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

Question 31

32.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)part revolution press with a type A gate
B)part revolution press with a type B gate
C)part revolution press with an adjustable barrier guard
D)full revolution press with a sweep

Question 32

24.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

Question 33

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

A)die enclosure guard
B)presence sensing device
C)fixed barrier
D)pullbacks

Question 34

29.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?

Question 35

36.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?

Question 36

33.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?

Question 37

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

A)die enclosure guard
B)presence sensing device
C)top stop limit
D)brake monitor and control system

Question 38

number of engagement points = 2

Question 39

28.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.

Question 40

30.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?

Question 41

58.Which press is full revolution?

Question 42

55.The machine pictured is

A)a shear
B)a press brake
C)a punch press
D)an OBI

Question 43

43.Label the nip point(s).

Question 44

52.Which of the following has adjustable members?

Question 45

56.The press pictured is an OBI.

Question 46

39.What system checks for top-stop overrun? How often is it required to check it?

Question 47

46.Label the nip point(s).

Question 48

50.Which of the following employs a sliding die?

Question 49

47.Label the nip point(s).

Question 50

50.Which of the following employs an interlock?

Question 51

40.Which of the following safeguarding methods may require the monitoring of top-stop overrun beyond a "normal limit reasonably established by the employer"?

A)type A gate
B)type B gate
C)presence sensing device
D)two-hand control

Question 52

54.The device pictured is an awareness barrier.

Question 53

41.Label the nip point(s).

Question 54

53.The device pictured is an adjustable barrier guard.

Question 55

42.Label the nip point(s).

Question 56

48.The type of guarding shown is

A)by brake monitor
B)by presence sensing
C)by location
D)by distance

Question 57

44.Label the nip point(s).

Question 58

45.Label the nip point(s).

Question 59

57.Which press is part revolution?

Question 60

56.The press pictured is an OBI.

Question 61

65.The device pictured is not appropriate for a full revolution press.

Question 62

68.The device pictured is a brake monitor.

Question 63

76.What is the principal hazard when compressed air is used for cleaning?

Question 64

70.At tripping time which position of the flywheel is luckiest from a safety standpoint on a mechanical power press?

Question 65

67.The device shown is not an acceptable safeguard for a mechanical power press.

Question 66

75.According to safety standards what is the air pressure limit for compressed air used for cleaning?

Question 67

63.The device pictured is a presence-sensing device.

Question 68

66.The device shown is prohibited for hand feeding.

Question 69

62.The device pictured is a presence-sensing device.

Question 70

64.The device pictured is an infrared sensor.

Question 71

60.The drawing illustrates a Type A or B gate.

Question 72

73.The machine pictured is a

A)table saw
B)bench saw
C)radial arm saw
D)band saw

Question 73

61.The device pictured is a Type A or B gate.

Question 74

71.Which switch is the overrun switch?

Question 75

59.The drawing illustrates a sliding die or bolster.

Question 76

74.The device pictured

A)removes carbon monoxide
B)reduces pressure
C)increases pressure
D)none of the above

Question 77

77.What two hazards are described in the text for the use of compressed air for cleaning?

Question 78

78.In what way is compressed air for cleaning considered a fatality hazard?

Question 79

72.Label the overrun switch.

Question 80

69.The device pictured is a brake stop-time measurement device.