# 10 If the wire diameter of a closed coil helical spring subjected to compressive load is Increased from 1 cm to 2 cm, other parameters remaining same, the deflection will decrease by a factor of

1.  16

2.  8

3.  4

4.  2

4

16

Explanation :
No Explanation available for this question

# The relationship between Young’s modulus (E), Bulk modulus (K) and Poisson’s ratio (p) is given by

1.  E = 3K (1-2µ)

2.  K = 3E (1-2 µ)

3.   E = 3K (1- µ)

4.  K = 3E (1- µ)

4

E = 3K (1-2µ)

Explanation :
No Explanation available for this question

# The ratio of Euler’s buckling loads of columns with the same parameters having (i) both ends fixed, and (ii) both ends hinged is

1.  2

2.  4

3.  6

4.   8

4

4

Explanation :
No Explanation available for this question

# If the length of the cantilever beam is halved, the natural frequency of the mass M at the end of this cantilever beam of negligible mass is increased by a factor of

1.  2

2.  4

3.  6

4.  8

4

6

Explanation :
No Explanation available for this question

# In centrifugal casting, the impurities are

1.  uniformly distributed

2.  forced towards the outer surface

3.  trapped near the mean radius of the casting

4.  collected at the center of the casting

4

collected at the center of the casting

Explanation :
No Explanation available for this question

# The ductility of a material with work hardening

1.  increases

2.  decreases

3.  remains unaffected

4.  unpredictable

4

decreases

Explanation :
No Explanation available for this question

# The temperature of a carburising flame in gas welding is that of aneutral or an oxidizing flame.

1.  lower than

2.  higher than

3.   equal to

4.  unrelated to

4

higher than

Explanation :
No Explanation available for this question

# In a blanking operation, the clearance is provided on

1.  the die

2.  both the die and the punch equally

3.  the punch

4.  neither the punch nor the die

4

the punch

Explanation :
No Explanation available for this question

# A built-up-edge is formed while machining

1.  ductile materials at high speed

2.  ductile materials at low speed

3.   brittle materials at high speed

4.   brittle materials at low speed

4

ductile materials at low speed

Explanation :
No Explanation available for this question

1.  10 sec

2.   20 sec

3.  60 sec

4.  100 sec

4