4

# Shear stress induced in a shaft subjected to tension will be

Maximum at periphery and zero at center

Maximum at center

Uniform throughout

None of the above

D. None of the above

4

One

Two

Three

Four

4

1 : 2

1 : 3

1 : 4

1 : 2.5

4

Equal to

Less than

More than

None of these

4

400 MPa

500 MPa

900 MPa

1400 MPa

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

4

# Impact strength of a material is an index of its

Toughness

Tensile strength

Capability of being cold worked

Hardness

4

Equal to one

Less than one

Greater than one

None of these

4

# The efficiency of a Carnot engine depends on

Working substance

Design of engine

Size of engine

Temperatures of source and sink

4

# The materials having same elastic properties in all directions are called

Ideal materials

Uniform materials

Isotropic materials

Piratical materials

4

Same

More

Less

Unpredictable

4

Wood

Coke

Anthracite coal

Pulverised coal

4

# Which of the following statement is incorrect?

The liquid fuels have higher calorific value than solid fuels

The solid fuels have higher calorific value than liquid fuels

A good fuel should have low ignition point

The liquid fuels consist of hydrocarbons

4

# Which of the following is correct?

Gauge pressure = Absolute pressure + Atmospheric pressure

Absolute pressure = Gauge pressure + Atmospheric pressure

Absolute pressure = Gauge pressure - Atmospheric pressure

Atmospheric pressure = Absolute pressure + Gauge pressure

4

# Brayton cycle consists' of following four processes

Two isothermals 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

# 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

t

2t

4t

8t

4

12

14

16

32

4

# The principal constituents of a fuel are

Carbon and hydrogen

Oxygen and hydrogen

Sulphur and oxygen

Sulphur and hydrogen

4

# A continuous beam is one which is

Fixed at both ends

Fixed at one end and free at the other end

Supported on more than two supports

Extending beyond the supports

4

# One kg of carbon monoxide requires 4/7 kg of oxygen and produces

11/3 kg of carbon dioxide gas

7/3 kg of carbon monoxide gas

11/7 kg of carbon dioxide gas

8/3 kg of carbon monoxide gas

4

Mild steel

Cast iron

Concrete

Bone of these

4

# The total energy of a molecule is shared equally by the various degrees of freedom possessed by it. This law is known as

Law of equipartition of energy

Law of conservation of energy

None of these

4

wl²/3√3

wl²/6√3

wl²/9√3

wl²/12√3

4

Malleability

Ductility

Plasticity

Elasticity

4

mR (T2 - T1)

mcv (T2 - T1)

mcp (T2 - T1)

mcp (T2 + T1)

4

# Otto cycle consists of

Two constant volume and two isentropic processes

Two constant pressure and two isentropic processes

Two constant volume and two isothermal processes

One constant pressure, one constant volume and two isentropic processes

4

√(KT/m)

√(2KT/m)

√(3KT/m)

√(5KT/m)

4

# The general gas energy equation is (where Q1 - 2 = Heat supplied, dU = Change in internal energy, and W1 - 2 = Work done in heat units)

Q1 - 2 = dU + W1 - 2

Q1 - 2 = dU - W1 - 2

Q1 - 2 = dU/W1 - 2

Q1 - 2 = dU × W1 - 2

4

# The increase in entropy of a system represents

Increase in availability of energy

Increase in temperature

Decrease in pressure