L&T ECC Technical Questions

When a body is in motion, the type of friction exeprienced by the body is:
1. Rolling friction
2. Limiting friction
3. Dynamic friction
4. Static friction
Answer: Option C.
Charles' Law states that
1. p/T= constant (v is kept constant)
2. p.v= constant (T is kept constant)
3. v/T = constant (p is kept constant)
4. None of these
Answer: Option C.

What should be the increase in length of the pendulum, in order to triple the period of swing?
1. Increased by 8-fold
2. Incraesed by 9-fold
3. Increased by 7-fold
4. No change
Answer: Option B.
The moment of interia of a square of side a about its base is:
1. a²/3
2. a⁴/2
3. a⁴/3
4. a²/2
Answer: Option C.
The cutting angle , for drilling stainless steel should be:
1. 90°
2. 150°
3. 180°
4. 135°
Answer: Option D.
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When two elements of a pair have surface contact when in motion, it is said to be :
1. Higher pair
2. Lower pair
3. Rolling pair
4. None of these
Answer: Option B.

Technical Questions asked in L&T ECC