4

# Principal planes are planes having

Maximum shear stress

No shear stress

Minimum shear stress

None of the above

B. No shear stress

4

3/7

7/3

11/3

3/11

4

# When the gas is heated at constant volume, the heat supplied

Increases the internal energy of the gas and increases the temperature of the gas

Does some external work during expansion

Both (A) and (B)

None of these

4

# If the rivets in adjacent rows are staggered and the outermost row has only one rivets, the arrangement of the rivets is called

Chain riveting

Zigzag riveting

Diamond riveting

Crisscross riveting

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

Carnot cycle

Stirling cycle

Otto cycle

Diesel cycle

4

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

Maximum calculated value

Minimum calculated value

Mean value

Extreme value

4

3 to 6

5 to 8

15 to 20

20 to 30

4

# The deformation per unit length is called

Tensile stress

Compressive stress

Shear stress

Strain

4

# Which is the incorrect statement about Carnot cycle?

It is used as the alternate standard of comparison of all heat engines.

All the heat engines are based on Carnot cycle.

It provides concept of maximising work output between the two temperature limits.

All of the above

4

One-half

One-third

Two-third

Three-fourth

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

3p/E × (2/m - 1)

3p/E × (2 - m)

3p/E × (1 - 2/m)

E/3p × (2/m - 1)

4

1.333 N/m2

13.33 N/m2

133.3 N/m2

1333 N/m2

4

# A masonry dam may fail due to

Tension in the masonry of the dam and its base

Overturning of the dam

Crushing of masonry at the base of the dam

Any one of the above

4

Homogeneous

Inelastic

Isotropic

Isentropic

4

Equal to

Less than

More than

None of these

4

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

Principal stress

Tensile stress

Compressive stress

Shear stress

4

11/7

9/7

4/7

All of the above

4

Plasticity

Ductility

Elasticity

Malleability

4

# Stirling and Ericsson cycles are

Reversible cycles

Irreversible cycles

Semi-reversible cycles

Quasi-static cycles

4

0°C

273°C

273 K

None of these

4

(p2/p1)γ - 1/ γ

(p1/p2)γ - 1/ γ

(v2/v1)γ - 1/ γ

(v1/v2)γ - 1/ γ

4

1 N-m/s

100 N-m

1000 N-m/s

1 × 106 N-m/s

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

Same as

Less than

Greater than

None of these

4

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

Resilience

Proof resilience

Modulus of resilience

Toughness

4

π /4 × τ × D³

π /16 × τ × D³

π /32 × τ × D³

π /64 × τ × D³

4

pv = mRT

pv = RTm

pvm = C

pv = (RT)m

4

# A cantilever beam is one which is

Fixed at both ends

Fixed at one end and free at the other end

Supported at its ends

Supported on more than two supports