Nondestructive testing (NDT) is a broad category of analysis procedures used in the scientific and technology industries to assess the qualities of a material, component, or system without causing harm.

Various NDT/NDE methods are :

Liquid Penetrant Testing (PT), 

Magnetic Particle Testing (MT), 

Radiographic Testing (RT), 

Ultrasonic Testing (UT), 

Visual Testing (VT),

Electromagnetic Testing (ET), 

Acoustic Emission Testing (AE),

Leak Testing (LT), 

Guided Wave Testing (GW), 

Ground Penetrating Radar (GPR), 

Laser Testing Methods (LM), 

Vibration Analysis (VA)

Magnetic Flux Leakage (MFL), 

Microwave Testing, 

Thermal/Infrared Testing (IR), 

and Neutron Radiographic Testing (NR). 

Commonly used in : Forensic engineering, mechanical engineering, petroleum engineering, electrical engineering, civil engineering, systems engineering, aeronautical engineering etc.

There is huge scope for NDT in industries.

After graduation or during your BE you can get ANST Level 2 certification which will prove you've completed training in the most common NDT methods. After this training you need only look for various NDT service companies (usually located near industrial area). These companies will train you and also provide exposure to testing methods for different industries. Once you've gained 3–4 years as a NDT technician you can move up NDT inspector in larger companies like ESSAR or reliance industries.

Most middle eastern countries , Russia and Canada recruit NDT specialist for their petroleum industries. so if you have any plans to travel to different countries this will give you that opportunity.