fml Flashcards
Can a shear or transverse wave travel in water or oil? (Multiple Choice)
B) No, due to lack of atomic attraction
The energy carried by a wave is proportional to the square of the amplitude. (True/False)
true
Transformers designed for higher frequencies require much less iron core and windings than those designed for low frequencies. How is this frequency created?
By using the inverter principle to create high frequency AC
The term laser is an acronym for : (Multiple Choice)
Question options:
A) light accelerated by selenium emitting radiation.
B) light amplification by stimulated emission of radiation.
C) light aligned to stimulate emission of radiation.
D) light amplification by stimulated electron radiation.
B) light amplification by stimulated emission of radiation.
The uniform stress in a rod is given by the: (Multiple Choice)
Question options:
A) load multiplied by the cross-sectional area of the rod.
B) cross-sectional area of the rod divided by the load.
C) load divided by the cross-sectional area of the rod.
D) transverse load divided by the cross-sectional area of the rod.
oad divided by the cross-sectional area of the rod.
The reduced section of a tensile specimen is the: (Multiple Choice)
Question options:
A) length of the specimen that is expected to deform during the test.
B) length of the specimen that does not deform during the test.
C) diameter of the specimen that is expected to deform during the test.
D) diameter of the specimen that is not expected to deform during the test.
C) diameter of the specimen that is expected to deform during the test.
With 8% nickel how much chromium must be added to produce austenitic stainless steel? (Multiple Choice)
Question options:
A) 10%
B) 14%
C) 18%
D) 22%
18
Why is it possible for some multipass welds to have a higher toughness than a single pass weld? (Multiple Choice)
Question options:
A) The increased number of passes will increase the tensile strength
B) The increased number of passes will increase the yield strength
C) The passes in the multipass weld harden the underlying grain structure
D) The passes in the multipass weld refine the underlying grain structure
D) The passes in the multipass weld refine the underlying grain structure
On a thin plate, the cooling rate is more sensitive to heat input and doubling the heat input will: (Multiple Choice)
Question options:
A) reduce the cooling rate four times.
B) reduce the cooling rate by half.
C) double the cooling rate.
D) not affect the cooling rate.
B) reduce the cooling rate by half.
Grain size can influence the properties of steel in significant ways. What heat treatment is selected to improve the toughness of steel? (Multiple Choice)
Question options:
A) Normalizing reduces grain size to increase toughness
B) Annealing reduces grainsize to increase toughness
C) Quenching and then cold working increases the grain size to increase toughness
D) Tempering reduces the martensitic grain size to improve toughness
A) Normalizing reduces grain size to increase toughness
Molten steel contains dissolved oxygen, which tends to make steel brittle. An alloying element that can be added to reduce the amount of oxygen is: (Multiple Choice)
Question options:
A) nitrogen.
B) carbon.
C) aluminum.
D) sulphur
C) aluminum.
When automatic oxy-fuel gas cutting a strip from one edge of a plate distortion will occur. Why? (Multiple Choice)
Question options:
A) Uneven heating by automatic travel uniformly expands the cut edge
B) Uneven heating by automatic travel expands the edge next to the cut
C) Uneven heating by automatic travel contracts the edge next to the cut
D) Uneven heating by automatic travel shortens the edge next to the cut
D) Uneven heating by automatic travel shortens the edge next to the cut
Which of the following electrodes is used with DC electrode positive only? (Multiple Choice)
Question options:
A) E4311
B) E4310
C) E4918
D) E4928
B) E4310
Why is the concept of concentricity in the manufacturing of covered electrodes important? (Multiple Choice)
Question options:
A) Because it helps in the handling of the electrode
B) For cosmetic reasons
C) To facilitate the arc starting
D) None of the above
A) Because it helps in the handling of the electrode
Two examples of good semi-conductors are: (Multiple Choice)
Question options:
A) copper and silicon.
B) silicon and germanium.
C) selenium and aluminum.
D) germanium and steel.
B) silicon and germanium.
What is the effect of frequency modulation when transistors are used for a DC power supply? (Multiple Choice)
Question options:
A) Changes in wire feed speed cause an increase in heat input
B) Widening of the arc
C) Increased droplet size
D) Increase puddle fluidity
A) Changes in wire feed speed cause an increase in heat input
With the GMAW process and a CV power source, the welding current is determined by: (Multiple Choice)
Question options:
A) the slope of the static characteristic.
B) the setting on the welding power source.
C) the open circuit voltage.
D) the wire feed speed.
D) the wire feed speed.
GMAW spray transfer is achieved with: (Multiple Choice)
Question options:
A) low current, low voltage, and CO2 shielding gas.
B) low current, low voltage, and argon-rich shielding gas.
C) high current, high voltage, and CO2 shielding gas.
D) high current, high voltage, and argon-rich shielding gas.
argon-rich shielding gas.
The primary control on a SMAW power supply is: (Multiple Choice)
Question options:
A) current.
B) voltage.
C) wire feed speed.
D) AC balance.
current
Touch starting is used with consumable electrode processes such as: (Multiple Choice)
Question options:
A) SAW, SMAW, and GTAW high frequency
B) GTAW high frequency, SMAW, and GMAW
C) SAW AND GTAW lift arc
D) SMAW and GMAW
C) SAW AND GTAW lift arc
With a constant current power source, the steeper the slope: (Multiple Choice)
Question options:
A) the more the current will vary.
B) the current will not vary.
C) the less control of current.
D) the less the current will vary
D) the less the current will vary
How much do the labour and overhead costs account for welding production? (Multiple Choice)
Question options:
A) 50%
B) 80%
C) 30%
D) 57%
80
What is the force that breaks the welding arc? (Multiple Choice)
Question options:
A) Impedance
B) Inductance
C) Magnetic field
D) Electrical potential
D) Electrical potential
A problem with reactively controlled welding machines is the low power factor. What is the ideal power factor? (Multiple Choice)
Question options:
A) 1 power factor
B) 0.7 power factor
C) 12 power factor
D) 0.5 power factor
1
What is the meaning of the concept “pickup” in the use of electrodes for SMAW? (Multiple Choice)
Question options:
A) More absorption of carbon in the weld due to the use of DCEN
B) More absorption of carbon in the weld due to the use of DCEP
C) No effect for either polarity
D) DCEN is never used with SMAW
B) More absorption of carbon in the weld due to the use of DCEP
What is the difference between E4918 and E4918-1 electrodes? (Multiple Choice)
Question options:
A) Just different numbers
B) E4918 is for cold temperature applications, E4918-1 is for high temperature applications.
C) E4918 and E4918-1 are both for high temperature applications
D) E4918 is for use to -30 °C and E4918-1 is for use to -45 °C
C) E4918 and E4918-1 are both for high temperature applications
What is the thermal expansion of a steel bar that is heated at 200 °C? (Multiple Choice)
Question options:
A) 0.00236 m
B) 0.00034 m
C) 2 m
D) 1.5 m
A) 0.00236 m
When welding heavy plates it is a good idea to have a small root opening rather than butting the parts tightly together because: (Multiple Choice)
Question options:
A) if the parts are butted tightly together, the root pass will act as a hinge and increase angular distortion.
B) the small root opening will increase root penetration thereby increasing cracking resistance due to reduced contraction.
C) the small root opening will allow the plates to move together as the weld shrinks and help to prevent cracking.
D) the small root opening will allow the plates to spread apart as the weld progress and help to prevent cracking.
C) the small root opening will allow the plates to move together as the weld shrinks and help to prevent cracking.
There are several steel types, one is the TMCP type steels. What are these? (Multiple Choice)
Question options:
A) TMCP involves controlled hot working and a microalloyed steel composition
B) TMCP involves controlled cold working and the addition of more carbon than regular carbon steels
C) TMCP cambering and mechanical forming of the final steel product
D) TMCP involves controlled cold working and a high alloyed steel composition
A) TMCP involves controlled hot working and a microalloyed steel composition
Fast cooling rates through the transformation temperature range (800-500 °C) in steel: (Multiple Choice)
Question options:
A) suppress the transformation temperature.
B) promote a coarser pearlitic structure.
C) develop a mixed arrangement of ferrite and pearlite grains.
D) dissolves the original martensitic grains.
D) dissolves the original martensitic grains.
Hammering a copper bar several times at room temperature causes: (Multiple Choice)
Question options:
A) reduction in thickness.
B) dislocations and work hardening.
C) dislocation and work softening.
D) total softening.
B) dislocations and work hardening.
There are many other ways in which a steel may be strengthened. Which of the following is a correct approach? (Multiple Choice)
Question options:
A) Allow the safe passage of dislocations by alloying
B) Impede the passage of dislocations by alloying
C) Alloy and then perform a normalizing heat treatment
D) Work the alloy by rolling in the austenitic range
B) Impede the passage of dislocations by alloying
What is Pearlite? (Multiple Choice)
Question options:
A) A layered form of ferrite and cementite
B) A layered form of pearlite and ferrite
C) A layered form of austenite and ferrite
D) A layered form of Iron and copper
A) A layered form of ferrite and cementite
Which of these stainless steels has the best low temperature impact properties? (Multiple Choice)
Question options:
A) Duplex
B) Austenitic
C) Ferritic
D) Precipitation hardening
Austenitic
In addition to austenite and ferrite, what is the third phase that is present in the iron-chromium phase diagram? (Multiple Choice)
Question options:
A) Pearlite
B) Sigma
C) Delta ferrite
D) Martensite
E) Alpha iron
B) Sigma
What determines the hardness of martensitic stainless steels? (Multiple Choice)
Question options:
A) Annealing heat treatment
B) Nickel and molybdenum
C) The relatively high carbon content
D) Small amounts of solution treatment elements
C) The relatively high carbon content
What method is typically used to avoid solidification cracking when welding austenitic stainless steels? (Multiple Choice)
Question options:
A) Use low carbon consumables
B) Use stabilized austenitic consumables
C) Use austenitic consumables that produce a small quantity of ferrite
D) Use high heat inputs
C) Use austenitic consumables that produce a small quantity of ferrite
What are the two types of tensile testing equipment generally used? (Multiple Choice)
Question options:
A) Electromechanical and hydraulic
B) Hydraulic and manual
C) Electric and semi-automatic
D) Hydraulic ram and inverter ram
A) Electromechanical and hydraulic
How is excess penetrant removed when using a post-emulsified penetrant? (Multiple Choice)
Question options:
A) By dipping or spraying on an emulsifier then water washing.
B) By brushing on an emulsifier then using a solvent.
C) By water washing immediately after the dwell time.
D) By using a solvent immediately after the dwell time.
A) By dipping or spraying on an emulsifier then water washing.
In potential drop inspection methods, the “drop” is measured in: (Multiple Choice)
Question options:
A) amperes.
B) degrees.
C) voltage.
D) pounds.
C) voltage.
Dye penetration reveals which kind of discontinuities? (Multiple Choice)
Question options:
A) Surface only
B) Subsurface porosity and deep cracks
C) Surface and subsurface linear and round indications
D) Only relevant indications
A) Surface only
Given a source size of 4 mm, a weld thickness of 25.4 mm, and a plate-to-source distance of 900 mm, what is the geometric unsharpness? (Multiple Choice)
Question options:
A) 0.113 mm
B) 141.7 mm
C) 0.007 mm
D) 0.0044 mm
E) 0.0282 mm
A) 0.113 mm
Light, radio waves, microwaves, gamma rays, and X-rays are all forms of: (Multiple Choice)
Question options:
A) radiation.
B) ultrasonic waves.
C) electromagnetic waves.
D) pulse waves.
C) electromagnetic waves.
The wavelength is the distance: (Multiple Choice)
Question options:
A) between the crests of the waves.
B) of one loop of wave.
C) between two molecules in straight line.
D) between two points at any direction.
D) between two points at any direction.
The ability of an ultrasonic system to distinguish between two closely spaced reflectors is known as: (Multiple Choice)
Question options:
A) sensitivity.
B) resolution.
C) attenuation..
D) reflection.
B) resolution.
Which standard defines the parameters that should be reported during the UT inspection procedure? (Multiple Choice)
Question options:
A) CSA W59
B) AWS D1.1
C) ASME
D) ASTM E164
D) ASTM E164
Which type of display gives a cross-sectional view showing the length and depth of discontinuities? (Multiple Choice)
Question options:
A) A-Scan
B) C-Scan
C) P-Scan
D) B-Scan
D) B-Scan
