4

# The point of contraflexure is a point where

Shear force changes sign

Bending moment changes sign

Shear force is maximum

Bending moment is maximum

B. Bending moment changes sign

4

12

14

16

32

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

# The entropy may be expressed as a function of

Pressure and temperature

Temperature and volume

Heat and work

All of these

4

Wood

Coke

Anthracite coal

Pulverised coal

4

Equal to

Less than

More than

None of these

4

400 MPa

500 MPa

900 MPa

1400 MPa

4

Zero

Minimum

Maximum

Infinity

4

# Principal planes are planes having

Maximum shear stress

No shear stress

Minimum shear stress

None of the above

4

Same as

Less than

Greater than

None of these

4

Loss of heat

No loss of heat

Gain of heat

No gain of heat

4

# Which of the following gas has the highest calorific value?

Coal gas

Producer gas

Mond gas

Blast furnace gas

4

# Kelvin-Planck's law deals with

Conservation of work

Conservation of heat

Conversion of heat into work

Conversion of work into heat

4

# According to First law of thermodynamics,

Total internal energy of a system during a process remains constant

Total energy of a system remains constant

Workdone by a system is equal to the heat transferred by the system

Internal energy, enthalpy and entropy during a process remain 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

Isothermal

Isentropic

Polytropic

None of these

4

# When the gas is cooled at constant pressure,

Its temperature increases but volume decreases

Its volume increases but temperature decreases

Both temperature and volume increases

Both temperature and volume decreases

4

# If both Stirling and Carnot cycles operate within the same temperature limits, then efficiency of Stirling cycle as compared to Carnot cycle

More

Less

Equal

Depends on other factors

4

pv = C

pv = m R T

pvn = C

pvγ = C

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

# 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

# The principal constituents of a fuel are

Carbon and hydrogen

Oxygen and hydrogen

Sulphur and oxygen

Sulphur and hydrogen

4

3 to 6

5 to 8

10 to 20

15 to 30

4

# The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and recondensed, then the liquid with the next higher boiling point is then evaporated and recondensed, and so on until all the available liquid fuels are separately recovered in the sequence of their boiling points. Such a process is called

Cracking

Carbonisation

Fractional distillation

Full distillation

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

# A beam which is fixed at one end and free at the other is called

Simply supported beam

Fixed beam

Overhanging beam

Cantilever beam

4

3p/E × (2/m - 1)

3p/E × (2 - m)

3p/E × (1 - 2/m)

E/3p × (2/m - 1)

4

# Which of the following is correct?

Absolute pressure = Gauge pressure + Atmospheric pressure

Gauge pressure = Absolute pressure + Atmospheric pressure

Atmospheric pressure = Absolute pressure + Gauge pressure

Absolute pressure = Gauge pressure - Atmospheric pressure

4

# A process, in which the gas is heated or expanded in such a way that the product of its pressure and volume remains constant, is called

Isothermal process

Hyperbolic process

Polytropic process

4

11/7

9/7

4/7

All of the above