MachineSAFE

Question 1

Standard AS/NZS 4024._____ covers general principles for design - risk assessment

Answer 1

AS/NZS 4024.1201

Question 2

Standard ____.1201 covers general principles for design - risk assessment

Answer 2

AS/NZS 4024.1201

Question 3

Standard AS/NZS 4024._____ describes an iterative process of design in order to reduce risk

Answer 3

AS/NZS 4024.1503

Question 4

Standard AS/NZS ____.1503 describes an iterative process of design in order to reduce risk

Answer 4

AS/NZS 4024.1503

Question 5

The performance level in AS/NZS 4024.1503 is made up of the following parameters:

Answer 5

1. Severity of injury
2. Frequency and exposure time to the hazard
3. Possibility of avoiding the hazard
4. Architecture (category)
5. Fault detection mechanism, DC - diagnostic coverage
6. CCF - Common Cause Failures
7. Reliability of components, MTTFd (Mean time to dangerous failure)
8. Safety related software (if required)
9. Systematic failure
10. Environmental and operating conditions

Question 6

Describe system behaviour of Category B

Answer 6

The occurrence of a fault can lead to the loss of the safety function

Question 7

Describe system behaviour of Category 1

Answer 7

The occurrence of a fault can lead to the loss of the safety function, but the probability of occurrence is less than in category B

Question 8

Describe system behaviour of Category 2

Answer 8

1. The occurrence of a fault can lead to the loss of the safety function BETWEEN CHECKS,
2. The loss of safety function is detected by the checks

Question 9

Describe system behaviour of Category 3

Answer 9

1. When a single fault occurs the safety function is always performed
2. Some but not all faults will be detected
3. Accumulation of undetected faults can lead to the loss of the safety function

Question 10

Describe system behaviour of Category 4

Answer 10

1. When a single fault occurs the safety function is always performed
2. Faults will be detected in time to prevent the loss of the safety function

Question 11

Describe the STRUCTURE and MONITORING required for category B

Answer 11

Single Channel structure, Monitoring not required

Question 12

Describe the STRUCTURE and MONITORING required for category 1

Answer 12

Single Channel structure, Monitoring not required

Question 13

Describe the STRUCTURE and MONITORING required for category 2

Answer 13

Single Channel structure, Periodic checks required

Question 14

Describe the STRUCTURE and MONITORING required for category 3

Answer 14

Two or more channels, Detection of single faults where practical

Question 15

Describe the STRUCTURE and MONITORING required for category 4

Answer 15

Two or more channels, Detection of single faults mandatory

Question 16

Standard AS/NZS ____.1502 covers validation by testing and analysis of safety functions and the category achieved by them

Answer 16

AS/NZS 4024.1502

Question 17

Standard AS/NZS 4024._____ covers validation by testing and analysis of safety functions and the category achieved by them

Answer 17

AS/NZS 4024.1502

Question 18

Standard AS/NZS 4024.1502 covers validation by ________ and _________of safety functions and the category achieved by them

Answer 18

validation by TESTING and ANALYSIS of safety functions

Question 19

Standard AS/NZS 4024.1502 covers validation by testing and analysis of safety functions and ________________

Answer 19

…the category achieved by them