Top 50+ Solved Fabrication Processes and Safety MCQ Questions Answer
Q. Inwhichwelding the surfacesoftwo components are subjected to static normalforce and oscillating shear stress?
a. Diffusion welding
b. Thermit welding
c. Laser beam welding
d. Ultrasonic welding
Q. Electron beam welding is carried out in?
a. Inert atmosphere
b. Partially filled chamber
c. Vacuum
d. Partially vacuum
Q. Which of the following is used to direct laser beam?
a. glass apertures
b. perforated glass sheets
c. flat optical elements
d. electro-magnetic coils
Q. Inert gas shielding is generally employed to protect _____
a. laser beam
b. molten puddle of metal
c. filler electrode
d. lenses
Q. The lasing material or crystal is excited by _____
a. neon lamps
b. krypton lamps
c. tungsten wire laps
d. CFLs
Q. Which ofthe following does not holdtrue aboutlaserbeamwelding?
a. Laser welding cannot be used in case ofjoints atintricate locations
b. It can produce tiny welds
c. Laser welding can be used for avariety of metal combinations
d. In case of LBW, thin welds on small diameter wires are less susceptible to burn back
Q. Laser welds are not influenced by _____
a. electric field
b. magnetic field
c. radio waves
d. ultraviolet rays
Q. Which of the following material properties has no effect on laser beam machining?
a. Reflectivity
b. Thermal conductivity
c. Weldability
d. Electrical conductivity
Q. In arc welding, arc initiation voltage is of the order
a. 20-60V
b. 60-100V
c. 100-140V
d. 140-180V
Q. In arc welding, the three elements to be controlled to obtain satisfactory weldingoperation are
a. Current, voltage and speed of travel
b. Current, voltage and arc length
c. Current, arc length and speedoftravel
d. Voltage, arc length and speed oftravel
Q. Which welding process is used to join two thick plates in one single pass?
a. Oxy-acetylene welding
b. Gas tungsten arc welding (TIG)
c. Gas metal arc welding (MIG)
d. Electroslag welding
Q. The followingwelding process is usedtoweldfastener to plateswithout drillingorpunchingholes?
a. Electroslag welding
b. Oxy-acetylene welding
c. Butt welding
d. Stud welding