API 570 EXAMS ESSENTIAL STUDY QUESTIONS
AND ANSWERS
◉ Which of the following increases the likelihood of Brittle Fracture?
A) Larger grain size.
B) operational temperatures above 800°F.
C) steels lees that ¼ " thick
D) the additional of nickel in the material.
Answer: A
◉ Which of the following increases the likelihood of Brittle Fracture?
A) smaller grain size
B) operating above transitional temperature
C) Thicker materials
D) the additional of nickel in the material.
Answer: C
◉ What test is used to determine a material's toughness?
A) Charpy impact test 4.2.7.3.e
B) guided bend test
C) metallography
,D) tension test
E) physical fitness test.
Answer: A
◉ Most brittle failures occur:
A) Below the impact transition temperature
B) on thinner materials
C) on "clean" steel
D) while in operation at elevated temperatures.
Answer: A
◉ ASME Section VIII had few limitations concerning Brittle Fracture
prior to:
A) 1955
B) 1962
C) 1973
D) 1987.
Answer: D
◉ A 4" thick 5 Chrome vessel operates at 1200 psig and 900°F. When
is this vessel least likely to fail by Brittle Fracture?
A) hydrotesting
,B) Normal Operation
C) shutting down the unit
D) starting up the unit.
Answer: B
◉ Most brittle failures appear as :
A) branched cracking
B) intergranular cracking
C) ductile tears
D) Cleveage.
Answer: D
◉ Which of the following is NOT a method used to prevent Brittle
Fracture?
A) Thorough inspections
B) strict controls on selecting construction materials
C) post weld heat treatment
D) controlling minimum operating temperatures.
Answer: A
◉ Thermal Fatigue is caused by:
A) Cyclic stresses that come from temperature variations.
, B) long term operation at elevated temperatures
C) excessive thermal growth
D) hours of physical activity during a hot summer day.
Answer: A
◉ Time to failure by Thermal Fatigue is primarily affected by :
A) magnitude of stress and operating temperature
B) Magnitude of stress and number of cycles
C) carbon content in material and operating temperature
D) carbon content in material and number of cycles.
Answer: B
◉ Thermal Fatigue becomes of concern if temperature swing
exceed:
A) 50%
B) 100%
C) 200 °F
D) 400 °F.
Answer: C
◉ Which of the following is NOT a primary initiating point for
Thermal Fatigue?
AND ANSWERS
◉ Which of the following increases the likelihood of Brittle Fracture?
A) Larger grain size.
B) operational temperatures above 800°F.
C) steels lees that ¼ " thick
D) the additional of nickel in the material.
Answer: A
◉ Which of the following increases the likelihood of Brittle Fracture?
A) smaller grain size
B) operating above transitional temperature
C) Thicker materials
D) the additional of nickel in the material.
Answer: C
◉ What test is used to determine a material's toughness?
A) Charpy impact test 4.2.7.3.e
B) guided bend test
C) metallography
,D) tension test
E) physical fitness test.
Answer: A
◉ Most brittle failures occur:
A) Below the impact transition temperature
B) on thinner materials
C) on "clean" steel
D) while in operation at elevated temperatures.
Answer: A
◉ ASME Section VIII had few limitations concerning Brittle Fracture
prior to:
A) 1955
B) 1962
C) 1973
D) 1987.
Answer: D
◉ A 4" thick 5 Chrome vessel operates at 1200 psig and 900°F. When
is this vessel least likely to fail by Brittle Fracture?
A) hydrotesting
,B) Normal Operation
C) shutting down the unit
D) starting up the unit.
Answer: B
◉ Most brittle failures appear as :
A) branched cracking
B) intergranular cracking
C) ductile tears
D) Cleveage.
Answer: D
◉ Which of the following is NOT a method used to prevent Brittle
Fracture?
A) Thorough inspections
B) strict controls on selecting construction materials
C) post weld heat treatment
D) controlling minimum operating temperatures.
Answer: A
◉ Thermal Fatigue is caused by:
A) Cyclic stresses that come from temperature variations.
, B) long term operation at elevated temperatures
C) excessive thermal growth
D) hours of physical activity during a hot summer day.
Answer: A
◉ Time to failure by Thermal Fatigue is primarily affected by :
A) magnitude of stress and operating temperature
B) Magnitude of stress and number of cycles
C) carbon content in material and operating temperature
D) carbon content in material and number of cycles.
Answer: B
◉ Thermal Fatigue becomes of concern if temperature swing
exceed:
A) 50%
B) 100%
C) 200 °F
D) 400 °F.
Answer: C
◉ Which of the following is NOT a primary initiating point for
Thermal Fatigue?
