4

# A pressure vessel is said to be a thick shell, when

It is made of thick sheets

The internal pressure is very high

The ratio of wall thickness of the vessel to its diameter is less than 1/10.

The ratio of wall thickness of the vessel to its diameter is greater than 1/10.

D. The ratio of wall thickness of the vessel to its diameter is greater than 1/10.

4

# The measurement of a thermodynamic property known as temperature is based on

Zeroth law of thermodynamics

First law of thermodynamics

Second law of thermodynamics

None of these

4

# The extremeties of any diameter on Mohr's circle represent

Principal stresses

Normal stresses on planes at 45°

Shear stresses on planes at 45°

Normal and shear stresses on a plane

4

# The gas turbine cycle with regenerator improves

Thermal efficiency

Work ratio

Avoids pollution

None of these

4

# The mass of excess air supplied is equal to

(23/100) × Mass of excess carbon

(23/100) × Mass of excess oxygen

(100/23) × Mass of excess carbon

(100/23) × Mass of excess oxygen

4

23.97 bar

25 bar

26.03 bar

34.81 bar

4

0

1

γ

4

Equal to

Less than

More than

None of these

4

1 N-m

1 kN-m

10 N-m/s

10 kN-m/s

4

# The variables which control the physical properties of a perfect gas are

Pressure exerted by the gas

Volume occupied by the gas

Temperature of the gas

All of these

4

# Which of the following is correct?

Gauge pressure = Absolute pressure + Atmospheric pressure

Absolute pressure = Gauge pressure + Atmospheric pressure

Absolute pressure = Gauge pressure - Atmospheric pressure

Atmospheric pressure = Absolute pressure + Gauge pressure

4

Sum

Difference

Product

Ratio

4

Equal to

Less than

More than

None of these

4

# The radius of the Mohrs circle in the given figure is equal to

Sum of two principal stresses

Difference of two principal stresses

Half the sum of two principal stresses

Half the difference of two principal stresses

4

# When a system changes its state from one equilibrium state to another equilibrium state, then the path of successive states through which the system has passed, is known as

Thermodynamic law

Thermodynamic process

Thermodynamic cycle

None of these

4

# Carnot cycle consists of

Two constant volume and two isentropic processes

Two isothermal and two isentropic processes

Two constant pressure and two isentropic processes

One constant volume, one constant pressure and two isentropic processes

4

# Modulus of rigidity is defined as the ratio of

Longitudinal stress to longitudinal strain

Volumetric stress to volumetric strain

Lateral stress to Lateral strain

Shear stress to shear strain

4

Carnot cycle

Otto cycle

Joule's cycle

Stirling cycle

4

# When a bar is subjected to a change of temperature and its deformation is prevented, the stress induced in the bar is

Tensile stress

Compressive stress

Shear stress

Thermal stress

4

# The cycle in which heat is supplied at constant volume and rejected at constant pressure is known as

Dual combustion cycle

Diesel cycle

Atkinson cycle

Rankine cycle

4

WD3n/Cd⁴

2WD3n/Cd⁴

4WD3n/Cd⁴

8WD3n/Cd⁴

4

# If a part is constrained to move and heated, it will develop

Principal stress

Tensile stress

Compressive stress

Shear stress

4

4/7

11/4

9/7

All of these

4

t

2t

4t

8t

4

mm/mm

kg/cm

Kg

kg/cm²

4

# Which of the following process can be made reversible with the help of a regenerator?

Constant pressure process

Constant volume process

Constant pvn process

All of these

4

# Energy can neither be created nor destroyed, but it can be transformed from one form to another. This statement is known as

Zeroth law of thermodynamics

First law of thermodynamics

Second law of thermodynamics

Kinetic theory of gases

4

# Proof resilience per material is known as

Resilience

Proof resilience

Modulus of resilience

Toughness

4

# When a body is subjected to a direct tensile stress (σx) in one plane accompanied by a simple shear stress (τxy), the maximum normal stress i

(σx/2) + (1/2) × √(σx² + 4 τ²xy)

(σx/2) - (1/2) × √(σx² + 4 τ²xy)

(σx/2) + (1/2) × √(σx² - 4 τ²xy)

(1/2) × √(σx² + 4 τ²xy)

4

# Which of the following cycles is not a reversible cycle?

Carnot

Ericsson

Stirling

None of the above