4

# A column is said to be a short column, when

Its length is very small

Its cross-sectional area is small

The ratio of its length to the least radius of gyration is less than 80

The ratio of its length to the least radius of gyration is more than 80

C. The ratio of its length to the least radius of gyration is less than 80

4

# A riveted joint in which every rivet of a row is opposite to other rivet of the outer row, is known as

Chain riveted joint

Diamond riveted joint

Crisscross riveted joint

Zigzag riveted joint

4

# When gas is heated at constant pressure, the heat supplied is utilised in

Increasing the internal energy of gas

Doing some external work

Increasing the internal energy of gas and also for doing some external work

None of the above

4

# The total strain energy stored in a body is termed a

Resilience

Proof resilience

Modulus of resilience

Toughness

4

# Flow stress corresponds to

Fluids in motion

Breaking point

Plastic deformation of solids

Rupture stress

4

Boyle's law

Charles' law

Gay-Lussac law

4

10 MPa

30 MPa

50 MPa

100 MPa

4

# Diesel cycle consists of following four processes

Two isothermal and two isentropic

Two isentropic and two constant volumes

Two isentropic, one constant volume and one constant pressure

Two isentropic and two constant pressures

4

# For which material the Poisson's ratio is more than unity

Steel

Copper

Aluminium

None of the above

4

# Proof resilience per material is known as

Resilience

Proof resilience

Modulus of resilience

Toughness

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

1 g

10 g

100 g

1000 g

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

# Which of the following statement is wrong?

The closed cycle gas turbine plants are external combustion plants.

In the closed cycle gas turbine, the pressure range depends upon the atmospheric pressure.

The advantage of efficient internal combustion is eliminated as the closed cycle has an external surface.

In open cycle gas turbine, atmosphere acts as a sink and no coolant is required.

4

12

14

16

32

4

Boyle's law

Charles' law

Gay-Lussac law

4

1

1.4

1.67

1.87

4

# In an extensive property of a thermodynamic system

Extensive heat is transferred

Extensive work is done

Extensive energy is utilised

None of these

4

Half

Same amount

Double

One-fourth

4

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

x/2) + (1/2) × √(σx² + 4 τ²xy)

x/2) - (1/2) × √(σx² + 4 τ²xy)

x/2) + (1/2) × √(σx² - 4 τ²xy)

(1/2) × √(σx² + 4 τ²xy)

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

# Reversed Joule cycle is known as

Carnot cycle

Bell-Coleman cycle

Rankine cycle

Stirling cycle

4

# The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will

Increase

Decrease

Remain unchanged

Increase/decrease depending on application

4

# For a beam, as shown in the below figure, the deflection at C is (where E = Young's modulus for the beam material, and I = Moment of inertia of the beam section.

Wl3/48 EI

Wa²b²/3EIl

[Wa/(a√3) x EIl] x (l² - a²)3/2

5Wl3/384 EI

4

# The efficiency of Diesel cycle approaches to Otto cycle efficiency when

Cut-off is increased

Cut-off is decreased

Cut-off is zero

Cut-off is constant

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

# A series of operations, which takes place in a certain order and restore the initial conditions at the end, is known as

Reversible cycle

Irreversible cycle

Thermodynamic cycle

None of these

4

# The gas turbine cycle with regenerator improves

Thermal efficiency

Work ratio

Avoids pollution

None of these

4

# The polytropic index (n) is given by

log (p1p2)/log (v1v2)

log (p2/ p1)/log (v1/ v2)

log (v1/ v2)/ log (p1/p2)

log [(p1v1)/(p2v2)]

4

Isothermally

Isentropically

Polytropically

None of these