1. What does CNC stand for?

Computer Numerical Control
Central Numbering Circuit
Controlled Numerical Computer

2. SI unit of force is?

Newton
Joule
Watt

3. Which material is primarily used for making cutting tools?

Mild steel
High Speed Steel (HSS)
Copper

4. Ohm’s law relates which quantities?

Current, Voltage, Resistance
Power, Voltage, Energy
Charge, Current, Time

5. Which of the following is a ferrous metal?

Aluminum
Cast Iron
Copper

6. What is the value of gravitational acceleration near Earth surface (approx)?

9.8 m/s²
8.9 m/s²
10.8 m/s²

7. In machining, what does ‘lathe’ primarily do?

Bend metal sheets
Rotate the workpiece to perform operations
Heat treat the component

8. Which gas is used in oxy-acetylene welding as the fuel gas?

Oxygen
Acetylene
Nitrogen

9. What is the perimeter of a rectangle with length 8 cm and width 3 cm?

22 cm
24 cm
18 cm

10. Which instrument measures current?

Voltmeter
Ammeter
Wattmeter

11. Which welding process uses an electrode that melts and becomes part of the weld?

TIG welding
MIG welding
Oxy-fuel welding

12. Which of these is a non-ferrous metal?

Steel
Bronze
Cast Iron

13. Efficiency of an ideal heat engine can be 100%? (Yes/No)

Yes
No

14. Which tool is used to measure internal diameter?

Vernier caliper
Inside micrometer
Screw gauge

15. What is the chemical symbol for Iron?

Ir
Fe
In

16. A cantilever beam is supported at:

Both ends
One end only
Middle only

17. Which of these is a measuring instrument for voltage?

Ammeter
Voltmeter
Tachometer

18. In gear terminology, what does ‘pitch circle’ refer to?

The circle on which teeth are formed
The circle that represents rolling without slipping
The outermost circle of gear

19. What is the value of π (pi) approximately?

2.71
3.14
1.62

20. Which machine is primarily used for drilling holes?

Milling machine
Drill press (Drilling machine)
Lathe

21. The process of removing material from a surface by engraving or cutting is called?

Forming
Machining
Casting

22. Which is a renewable energy source?

Coal
Solar
Natural gas

23. Which dimension is measured by a screw gauge (micrometer)?

Small external dimensions (like wire diameter)
Color
Weight

24. What does HVAC stand for?

High Voltage Alternating Current
Heating, Ventilation, and Air Conditioning
Hydraulic Valve Air Control

25. If a right triangle has legs 3 and 4, the hypotenuse is?

5
6
7

26. Which process joins metals using pressure and heat without melting the base metals?

Brazing
Soldering
Forging

27. A hexagon has how many sides?

5
6
8

28. Which of these is used as a lubricant in machining?

Cutting oil
Sodium chloride
Sand

29. The chemical formula of water is?

H2O
CO2
O2

30. If a motor runs at 1500 RPM, how many revolutions per second approximately? (use 60 seconds = 1 minute)

25 rps
150 rps
0.025 rps