4

Boyle's law

Charles' law

Gay-Lussac law

A. Boyle's law

4

Change

Do not change

Both (A) and (B)

None of these

4

# When a perfect gas is expanded through an aperture of minute dimensions, the process is known as

Isothermal process

Free expansion process

Throttling process

4

# The gas constant (R) is equal to the

Sum of two specific heats

Difference of two specific heats

Product of two specific heats

Ratio of two specific heats

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

1.333 N/m2

13.33 N/m2

133.3 N/m2

1333 N/m2

4

δl = 4PE/ πl²

δl = 4πld²/PE

δl = 4Pl/πEd₁d₂

δl = 4PlE/ πd₁d₂

4

Petrol

Kerosene

Fuel oil

Lubricating oil

4

# The following cycle is used for air craft refrigeration

Brayton cycle

Joule cycle

Carnot cycle

Reversed Brayton cycle

4

# The efficiency of the Carnot cycle may be increased by

Increasing the highest temperature

Decreasing the highest temperature

Increasing the lowest temperature

Keeping the lowest temperature constant

4

# First law of thermodynamics deals with

Conservation of heat

Conservation of momentum

Conservation of mass

Conservation of energy

4

# Carbonisation of coal consists of

Drying and crushing the coal to a fine powder

Moulding the finely ground coal under pressure with or without a binding material

Heating the wood with a limited supply of air to temperature not less than 280°C

None of the above

4

# The processes occuring in open system which permit the transfer of mass to and from the system, are known as

Flow processes

Non-flow processes

None of these

4

# Select the wrong statement

A Joule cycle consists of two constant volume and two isentropic processes.

An Otto cycle consists of two constant volume and two isentropic processes.

An Ericsson cycle consists of two constant pressure and two isothermal processes.

All of the above

4

Creeping

Yielding

Breaking

Plasticity

4

# In a steady flow process, the ratio of

Heat transfer is constant

Work transfer is constant

Mass flow at inlet and outlet is same

All of these

4

12

14

16

32

4

External energy

Internal energy

Kinetic energy

Molecular energy

4

Greater than

Less than

Equal to

None of these

4

# In an isothermal process,

There is no change in temperature

There is no change in enthalpy

There is no change in internal energy

All of these

4

2

4

8

16

4

# Which of the following statement is correct?

The stress is the pressure per unit area

The strain is expressed in mm

Hook's law holds good upto the breaking point

Stress is directly proportional to strain within elastic limit

4

237°C

-273°C

-237°C

273°C

4

Short column

Long column

Weak column

Medium column

4

# When a body is subjected to biaxial stress i.e. direct stresses (σx) and (σy) in two mutually perpendicular planes accompanied by a simple shear stress (τxy), then minimum normal stress is

x + σy)/2 + (1/2) × √[(σx - σy)² + 4 τ²xy]

x + σy)/2 - (1/2) × √[(σx - σy)² + 4 τ²xy]

x - σy)/2 + (1/2) × √[(σx + σy)² + 4 τ²xy]

x - σy)/2 - (1/2) × √[(σx + σy)² + 4 τ²xy]

4

0

1

γ

4

# Hooke's law holds good up to

Yield point

Limit of proportionality

Breaking point

Elastic limit

4

Zeroth

First

Second

Third

4

# When a beam is subjected to a bending moment, the strain in a layer is __________ the distance from the neutral axis.

Equal to

Directly proportional to

Inversely proportional to

Independent of

4

Low

Very low

High

Very high