A. Cutting torch
B. Drilling
C. Punching
D. None of these
Related Mcqs:
- Which of the following is preferred for riveting ?
A. Lap joint
B. Butt joint
C. Either A. or B.
D. Neither A. nor B. - Oxygen cylinders used for autogenous (cutting/welding) purposes are ___________________?
A. Seamless & made of steel
B. Heat treated before use
C. Made by sand casting
D. Welded steel cylinders - Case hardening is not done by________________?
A. Nitriding
B. Hot dipping
C. Electroplating
D. Both ‘B’ & ‘C’ - Large scale fire on fuel gas line is normally extinguished by________________?
A. Water
B. Steam
C. Foam
D. Nitrogen - Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than ?
A. 5
B. 10
C. 20
D. 35 - Damage to metal surface by mechanical action is called____________________?
A. Pitting
B. Corrosion
C. Erosion
D. None of these - Bad odour in sanitary latrines is reduced by periodically sprinkling_____________________?
A. Bleaching powder
B. Lime powder
C. Aluminium sulphate
D. None of these - Silicon in steel__________________?
A. Makes it usable in almost all magnetic circuits where alternating current is used
B. Increases its electrical resistivity and decreases the hysteresis loss
C. Is present upto 5% & 4% respectively when used in transformers & motor armatures
D. All ‘A’, ‘B’ & ‘C’ - Inertial forces are obtained, when the elastic forces are multiplied by ______________ number?
A. Mach
B. Froude
C. Reynolds
D. Euler - Pick out the wrong statement ?
A. A ferromagnetic material becomes paramagnetic above the ‘Curie temperature’
B. Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic
materials
C. Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and
coercive forces
D. Tungsten steel and alnico are not hard magnetic materials
