4

# A thin cylindrical shell of diameter (D) and thickness (t) is subjected to an internal pressure (p). The ratio of longitudinal strain to volumetric strain is

(m - 1)/ (2m - 1)

(2m - 1)/ (m - 1)

(m - 2)/ (3m - 4)

(m - 2)/ (5m - 4)

D. (m - 2)/ (5m - 4)

4

# For a perfect gas, according to Boyle's law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)

p v = constant, if T is kept constant

v/T = constant, if p is kept constant

p/T = constant, if v is kept constant

T/p = constant, if v is kept constant

4

# A fletched beam is used to

Change the shape of the beam

Effect the saving in material

Equalise the strength in tension and compression

Increase the cross-section of the beam

4

# When a gas is heated at constant pressure

Its temperature will increase

Its volume will increase

Both temperature and volume will increase

Neither temperature not volume will increase

4

# Strain re-setters are used to

Measure shear strain

Measure linear strain

Measure volumetric strain

Relieve strain

4

# The compression ratio is the ratio of

Swept volume to total volume

Total volume to swept volume

Swept volume to clearance volume

Total volume to clearance volume

4

# Which of the following is a reversible non-flow process?

Isochoric process

Isobaric process

Hyperbolic process

All 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

Smaller end

Larger end

Middle

Anywhere

4

# Producer 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 buckling load for a given material depends on

Slenderness ratio and area of cross-section

Poisson's ratio and modulus of elasticity

Slenderness ratio and modulus of elasticity

Slenderness ratio, area of cross-section and modulus of elasticity

4

1/27th

1/93th

1/173th

1/273th

4

# In the below figure, the stress corresponding to point D is

Yield point stress

Breaking stress

Ultimate stress

Elastic limit

4

# Stirling cycle consists of

Two constant volume and two isentropic processes

Two constant volume and two isothermal processes

Two constant pressure and two isothermal processes

One constant volume, one constant pressure and two isentropic processes

4

# First law of thermodynamics deals with

Conservation of heat

Conservation of momentum

Conservation of mass

Conservation of energy

4

Same

Lower

Higher

None of these

4

3 to 6

5 to 8

10 to 20

15 to 30

4

# The energy absorbed in a body, when it is strained within the elastic limits, is known as

Strain energy

Resilience

Proof resilience

Modulus of resilience

4

K₁ K₂

(K₁ + K₂)/ 2

(K₁ + K₂)/ K₁ K₂

K₁ K₂/ (K₁ + K₂)

4

# Young's modulus is defined as the ratio of

Volumetric stress and volumetric strain

Lateral stress and lateral strain

Longitudinal stress and longitudinal strain

Shear stress to shear strain

4

# A steel bar of 5 mm is heated from 25°C to 45°C and it is free to expand. The bar will induce

No stress

Shear stress

Tensile stress

Compressive stress

4

Greater than

Less than

Equal to

None of these

4

W1 - 2 = 0

Q1 - 2 = 0

dU = 0

All of these

4

Workdone

Entropy

Enthalpy

None of these

4

# In a belt drive, the pulley diameter is doubled, the belt tension and pulley width remaining same. The changes required in key will be

Increase key length

Increase key depth

Increase key width

Double all the dimensions

4

# The fuel mostly used in steam boilers is

Brown coal

Peat

Coking bituminous coal

Non-coking bituminous coal

4

# Select the correct statement as per Charles' law

p.v = constant, if T is kept constant

v/T = constant, if p is kept constant

p/T = constant, if v is kept constant

T/p = constant, if v is kept constant

4

Vapour

Perfect gas

Air

Steam

4

# For the same maximum pressure and temperature,

Otto cycle is more efficient than Diesel cycle

Diesel cycle is more efficient than Otto cycle

Dual cycle is more efficient than Otto and Diesel cycles

Dual cycle is less efficient than Otto and Diesel cycles

4

# The bending moment at a point on a beam is the algebraic ________ of all the moments on either side of the point.

Sum

Difference

Multiplication

None of the above