MCQ
1. What is the flame temperature of acetylene?
1700°C
2200°C
2800°C
3200°C
2. What is typically the frequency used in ultrasonic inspection?
0.1MHz to 15MHz
0.5MHz to 13MHz
1MHz to 17MHz
1.8MHz 10 19Mile
3. What is the flame temperature of methane?
2000°C
1200°C
2700°C
3300°C
4. Which of the following method is not used in applying pressure in spot welding process?
Hand lever
Foot lever
Air pressure
Hydraulic cylinder
5. Which of the following is not a type of resistance welding?
Seam
Projection
Electro-slag
Spot
6. Spot welding-f electrode ব্যবহৃত হয়...
Stainless steel
Aluminium
Copper
Brass
7. The process of joining similar or dissimilar materials by heating them below 450°C using non-ferrous filler material is called as-
Beaking
Soldering
Welding
All of the above
8. What is the minimum power supply needed for the working of spot welding process?
10kVA
14 kVA
6kVA
22kVA
9. What is the flame temperature of water gas?
2500°C
2800°C
2300°C
3100°C
10. In a neutral flame, what is the temperature in the inner core?
3200°C
2100°C
1250°C
2700°C
11. How are the metals to be welded connected to each other in spot welding?
Electric contact
Magnetic field
Mechanical pressure
Direct contact
12. Carburising flame has excess of oxygen supply.
True
False
13. Up to what thickness, can steel he welded using spot welding process?
10 mm
11mm
12 mm
13 mum
14. Which of the following method is not used in applying pressure in spot welding process?
Hand lever
Foot lever
Air pressure
Hydraulic cylinder
15. Oxidizing flame has equal volumes of oxygen and acetylene supply.
True
False
16. Up to what thickness, can steel be welded using spot welding process?
10 mm
11 mm
12 mm
13 mm
17. What is the maximum power supply needed for the working of spot welding process?
135kVA
140kVA
145KVA
150KVA
18. How are the metals to be welded connected to each other in spot welding?
Electric contact
Magnetic field
Mechanical pressure
Direct contact
19. Which kind of resistance is experienced in upset butt welding?
Electric resistance
Magnetic resistance
Thermal resistance
Air resistance
20. What is the flame temperature of hydrogen?
2000°C
1200°C
2700°C
3300°C