4

# The bending stress in a beam is _________ section modulus.

Inversely proportional to two times

Directly proportional to

Inversely proportional to

None of these

C. Inversely proportional to

4

# Which of the following statement is correct?

The heat and work are boundary phenomena

The heat and work represent the energy crossing the boundary of the system

The heat and work are path functions

All of the above

4

OC

OP

OQ

PQ

4

wl/4

wl/2

wl

wl²/2

4

# A vertical column has two moments of inertia (i.e. Ixx and Iyy ). The column will tend to buckle in the direction of the

Perpendicular to the axis of load

Maximum moment of inertia

Minimum moment of inertia

4

# Mond gas is obtained by

Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast

Carbonisation of bituminous coal

Passing steam over incandescent coke

Passing air and a large amount of steam over waste coal at about 650°C

4

# The efficiency of Diesel cycle depends upon

Temperature limits

Pressure ratio

Compression ratio

Cut-off ratio and compression ratio

4

Greater than

Less than

Equal to

None of these

4

# The absolute zero pressure will be

When molecular momentum of the system becomes zero

At sea level

At the temperature of - 273 K

At the centre of the earth

4

√(KT/m)

√(2KT/m)

√(3KT/m)

√(5KT/m)

4

237°C

-273°C

-237°C

273°C

4

# Reversed Joule cycle is known as

Carnot cycle

Bell-Coleman cycle

Rankine cycle

Stirling cycle

4

2

8

16

32

4

# In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is

More

Less

Same

More/less depending on composition

4

# During which of the following process does heat rejection takes place in Carnot cycle?

Isothermal expansion

Isentropic expansion

Isothermal compression

Isentropic compression

4

# The materials having same elastic properties in all directions are called

Ideal materials

Uniform materials

Isotropic materials

Piratical materials

4

# Diesel cycle consists of __________ processes.

Two constant volume and two isentropic

Two constant pressure and two isentropic

Two constant volume and two isothermal

One constant pressure, one constant volume and two isentropic

4

# For a beam, as shown in the below figure, the deflection at C is (where E = Young's modulus for the beam material, and I = Moment of inertia of the beam section.

Wl3/48 EI

Wa²b²/3EIl

[Wa/(a√3) x EIl] x (l² - a²)3/2

5Wl3/384 EI

4

-100 MPa

250 MPa

300 MPa

400 MPa

4

# The following cycle is used for air craft refrigeration

Brayton cycle

Joule cycle

Carnot cycle

Reversed Brayton cycle

4

# When two plates are butt together and riveted with cover plates with two rows of rivets, the joint is known as

Lap joint

Butt joint

Single riveted single cover butt joint

Double riveted double cover butt joint

4

# Flow stress corresponds to

Fluids in motion

Breaking point

Plastic deformation of solids

Rupture stress

4

# The layer at the centre of gravity of the beam as shown in the below figure, will be

In tension

In compression

Neither in tension nor in compression

None of these

4

Pressure

Volume

Temperature

Density

4

0°C

273°C

273 K

None of these

4

# The ratio of direct stress to volumetric strain in case of a body subjected to three mutually perpendicular stresses of equal intensity, is equal to

Young's modulus

Bulk modulus

Modulus of rigidity

Modulus of elasticity

4

t

2t

4t

8t

4

# The mass of carbon per kg of flue gas is given by

(11/3) CO2 + (3/7) CO

(3/7) CO2 + (11/3) CO

(7/3) CO2 + (3/11) CO

(3/11) CO2 + (7/3) CO

4

Greater than

Less than

Equal to

None of these

4

Wl3 / 48EI

5Wl3 / 384EI

Wl3 / 392EI

Wl3 / 384EI