CVA Vibration Standards & Safety 3

Question 1

Which ISO standard defines the training, experience, and examination requirements for certifying vibration analysts in Categories I through IV?

Accepted Answer

ISO 18436-2

Answer

ISO 18436-2 sets the qualification and assessment requirements for vibration condition monitoring and diagnostics personnel.

Question 2

According to ISO 18436-2, approximately how much vibration experience is required for Category II certification?

Accepted Answer

18 months

Answer

Category II requires about 18 months of cumulative experience, compared with 6 for Category I, 36 for III, and 60 for IV.

Question 3

Which ISO 1940-1 balance quality grade is typically specified for general machinery such as fans, pumps, and electric motor rotors?

Accepted Answer

G6.3

Answer

G6.3 is the common grade for general industrial rotors such as pumps, fans, and motors.

Question 4

Gas and steam turbines, turbo-compressors, and machine-tool drives are typically balanced to which ISO 1940-1 grade?

Accepted Answer

G2.5

Answer

High-speed precision rotors such as turbines and turbo-compressors are typically balanced to G2.5.

Question 5

In ISO 1940-1, the balance quality grade G is the product of the specific unbalance (eccentricity) and what?

Accepted Answer

Angular velocity

Answer

G = e x omega, so the grade is expressed in mm/s.

CVA - Certified Vibration Analyst Practice Test