11
The equation of a parabolic arch of span $$l$$ and rise h, is given by
A)
$${\text{y}} = \frac{{\text{h}}}{{{l^2}}} \times \left( {1 - {\text{x}}} \right)$$
B)
$${\text{y}} = \frac{{2{\text{h}}}}{{{l^2}}} \times \left( {1 - {\text{x}}} \right)$$
C)
$${\text{y}} = \frac{{3{\text{h}}}}{{{l^2}}} \times \left( {1 - {\text{x}}} \right)$$
D)
$${\text{y}} = \frac{{4{\text{h}}}}{{{l^2}}} \times \left( {1 - {\text{x}}} \right)$$
Answer & Solution
Answer: Option
D
12
The equivalent length of a column of length L having one end fixed and the other end free, is
A)
2L
B)
L
C)
$$\frac{{\text{L}}}{2}$$
D)
$$\frac{{\text{L}}}{{\sqrt 2 }}$$
Answer & Solution
Answer: Option
A
13
Pick up the correct statement from the following:
A)
A wire wound in spiral form, is called a helical spring
B)
The pitch of a close coil spring, is very small
C)
The angle made by the coil with horizontal, is called the angle of helix
D)
All the above
Answer & Solution
Answer: Option
D
14
The area of the core of a column of cross sectional area A, is
A)
$$\frac{1}{3}{\text{A}}$$
B)
$$\frac{1}{6}{\text{A}}$$
C)
$$\frac{1}{{12}}{\text{A}}$$
D)
$$\frac{1}{{18}}{\text{A}}$$
Answer & Solution
Answer: Option
D
15
The strain energy stored in a spring when subjected to greatest load without being permanently distorted, is called
A)
Stiffness
B)
Proof resilience
C)
Proof stress
D)
Proof load
Answer & Solution
Answer: Option
B
16
The greatest load which a spring can carry without getting permanently distorted, is called
A)
Stiffness
B)
Proof resilience
C)
Proof stress
D)
Proof load
Answer & Solution
Answer: Option
D
17
Pick up the correct statement from the following:
A)
Hoop strain of the walls of a cylinder due to liquid is $$\frac{{{\text{pd}}}}{{2{\text{tE}}}}\left[ {1 - \frac{1}{{2{\text{m}}}}} \right]$$
B)
Longitudinal strain in the walls of a cylinder due to liquid is $$\frac{{{\text{pd}}}}{{2{\text{tE}}}}\left[ {\frac{1}{2} - \frac{1}{{\text{m}}}} \right]$$
C)
Volumetric change in the cylinder due to liquid is $$\frac{{{\text{pd}}}}{{2{\text{tE}}}}\left[ {\frac{5}{2} - \frac{2}{{\text{m}}}} \right]$$
D)
All the above
Answer & Solution
Answer: Option
D
18
A shaft rotating N.R.M. under a torque T, transmits a power
A)
$$\frac{{{\text{T}}\pi {\text{N}}}}{{30}}$$ Newton metres/sec
B)
$$\frac{{{\text{T}}\pi {\text{N}}}}{{30}}$$ Newton metres/min
C)
$$\frac{{{\text{T}}\pi {\text{N}}}}{{60}}$$ Newton metres/min
D)
$$\frac{{{\text{T}}\pi {\text{N}}}}{{60}}$$ Newton metres/sec
Answer & Solution
Answer: Option
A
19
A shaft subjected to a bending moment M and a torque T, experiences
A)
Maximum bending stress $$ = \frac{{32{\text{M}}}}{{\pi {{\text{d}}^3}}}$$
B)
Maximum shear stress $$ = \frac{{16{\text{T}}}}{{\pi {{\text{d}}^3}}}$$
C)
Both A and B
D)
Neither A nor B
Answer & Solution
Answer: Option
C
20
The strain energy due to volumetric strain
A)
Is directly proportional to the volume
B)
Is directly proportional to the square of exerted pressure
C)
Is inversely proportional to Bulk modulus
D)
All the above
Answer & Solution
Answer: Option
D
