4

# A thin mild steel wire is loaded by adding loads in equal increments till it breaks. The extensions noted with increasing loads will behave as under

Uniform throughout

Increase uniformly

First increase and then decrease

Increase uniformly first and then increase rapidly

D. Increase uniformly first and then increase rapidly

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

cv/ cp =R

cp - cv = R

cv = R/ γ-1

Both (B) and (C)

4

# Formula based on IS codes is based on

Straight line formula

Eulers formula

Rankines formula

Secant formula

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

# Diamond riveted joint can be adopted in the case of following type of joint

Butt joint

Lap joint

Double riveted lap joints

All types of joints

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

# 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

# Strain energy is the

Energy stored in a body when strained within elastic limits

Energy stored in a body when strained up to the breaking of a specimen

Maximum strain energy which can be stored in a body

Proof resilience per unit volume of a material

4

Equal to

Less than

Greater than

None of these

4

# The assumption made in Euler's column theory is that

The failure of column occurs due to buckling alone

The length of column is very large as compared to its cross-sectional dimensions

The column material obeys Hooke's law

All of the above

4

2

8

16

32

4

# Which of the following is the correct statement of the second law of thermodynamics?

It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work.

It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source.

There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy.

All of the above

4

# The safe twisting moment for a compound shaft is equal to the

Maximum calculated value

Minimum calculated value

Mean value

Extreme value

4

# Which of the following statement is correct?

The increase in entropy is obtained from a given quantity of heat at a low temperature.

The change in entropy may be regarded as a measure of the rate of the availability or unavailability of heat for transformation into work.

The entropy represents the maximum amount of work obtainable per degree drop in temperature.

All of the above

4

Oxygen

Sulphur

Nitrogen

Carbon

4

Equal to

Less than

Greater than

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

# A thin mild steel wire is loaded by adding loads in equal increments till it breaks. The extensions noted with increasing loads will behave as under

Uniform throughout

Increase uniformly

First increase and then decrease

Increase uniformly first and then increase rapidly

4

Elements

Compounds

Atoms

Molecules

4

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

Principal stress

Tensile stress

Compressive stress

Shear stress

4

# The efficiency of Carnot cycle depends upon

Temperature limits

Pressure ratio

Volume compression ratio

Cut-off ratio and compression ratio

4

kJ

kJ/kg

kJ/m2

kJ/m3

4

Same

Twice

Four times

Eight times

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

Loss of heat

No loss of heat

Gain of heat

No gain of heat

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

Kelvin

Joule

Clausis

Gay-Lussac

4

1

0

-1

10