1
NDA General Ability 14th September 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Bottom of a tank containing water appears to be raised. It is due to 
1
Reflection of light 
2
Refraction of light 
3
Interference of light 
4
Diffraction of light  
2
NDA General Ability 14th September 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
SONAR stands for 
1
Sonographic Natural Ranging 
2
Simple Operational Navigation Ranging 
3
Sound Navigation and Ranging 
4
Simple Operational Natural Ranging  
3
NDA General Ability 14th September 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following radiations has longer wavelength ? 
1
X-rays 
2
Ultraviolet
3
Micro Wave 
4
Infra-red  
4
NDA General Ability 14th September 2025
MCQ (Single Correct Answer)
+4
-1.33
Change Language
For a material under static conditions, which one among the following statements is correct ? 
1
An insulator can be charged 
2
A perfect  charged can be conductor
3
Both perfect conductor and insulator can be charged 
4
Both perfect conductor and insulator cannot be charged