THERMOFLUIDS

Which of the following does not belong to the group?
a.
Gas admission system
b.
Time injection system
c.
Mechanical injection system
d. Air injection system

Time injection system

What is the origin of the energy conservation equation used in flow system.
a.
First law of thermodynamics
b.
Second law of thermodynamics
c.
Newton's Second law of motion
d.
Newton's First law of motion

First law of thermodynamics

Dry air can be approximated as __% oxygen and __% nitrogen by mole numbers.
a.
30% and 70%
b.
21% and 79%
c.
70% and 30%
d. 79% and 21%

21% and 79%

The reciprocal of density is?
a.
Specific volume
b.
Specific heat
c.
Specific weight
d. Specific gravity

Specific volume

What happens to the thermal conductivity of diatomic gases if the temperature is increase?
a.
The thermal conductivity decreases
b.
The thermal conductivity remains constant
c.
The thermal conductivity will also increase
d. The thermal conductivity partially increases then decreases

The thermal conductivity will also increase

In order to emit electromagnetic radiation, an object must be at a temperature:
a.
Above 0°C
b.
Above 0 K
c.
Above that of its surroundings
d. High enough for it to glow

Above 0 K

Most commercially available petroleum lubricating oil deteriorates staring from operating temperature of:
a.
150 F
b.
300 F
c.
200 F
d. 250 F

200 F

Superheated vapor behaves
a.
approximately as a gas
b.
just as steam
c.
just as ordinary vapor
d. just as gas

approximately as a gas

For a saturated vapor, the relationship between temperature and pressure is given by:
a.
a Viral equation of state
b.
the steam stable
c.
the perfect gas law
d. Van der Waal's equation

the steam stable

The heat transfer term in the first law of thermodynamics may be due to any of the
a.
Convection
b.
Radiation
c.
Internal heat generation(e.g., chemical reaction)
d. Conduction

Internal heat generation(e.g., chemical reaction)

Thermal conductivity of wood depends on which of the following:
a.
Moisture
b.
All of the other choices
c.
Density
d. Temperature

All of the other choices

Each of the following is correct values of standard atmospheric pressure except:
a.
14.962 psia
b.
760 torr
c.
1,000 atm
d. 1013 mmHg

d. 1013 mmHg

When two bodies, isolated from other environment, are in equilibrium with a third body, the two are in thermal equilibrium with each other.
a. third law of thermodynamics
b.
first law of thermodynamics
c.
second law of thermodynamics
d. Zeroth law of thermodynamics

d. Zeroth law of thermodynamics

The Carnot refrigeration cycle includes all of the following processes except:
a.
Isentropic expansion
b.
Isentropic compression
c.
Isenthalpic expansion
d. Isothermal heating

d. Isothermal heating

The process in which heat energy is transferred to thermal energy storage device is known as:
a.
Intercooling
b.
Heat transfer
c.
Regeneration
d. Adiabatic

Regeneration

Is a simple method of determining the static pressure in a pipe or other vessel
a.
Piezometer tube
b.
Pitot tube
c.
Draft tube
d.
None of the othe choices

Piezometer tube

The solid-liquid equilibrium of Tungsten is at what temperature?
a.
1063°C
b.
1774°C
c.
630.5°C
d. 960.8°C

1774°C

Which of the following statements about entropy is false
a.
an irreversible process increases entropy of the universe b.
entropy of a mixture is greater than that of its components under the same condition
c.
entropy of a crystal at 0 F is zero d.
net entropy change in any closed cycle is zero

entropy of a crystal at 0 F is zero

The thermal efficiency of a dual cycle engine with fixed compression ratio and fixed quantity of heat and with increase in pressure ratio, will
a.
Decrease
b.
Increase
c.
Depends on other factors
d. Remain same

Increase

For which type of process does the equation dq = Tds hold
a.
reversible
b.
isothermal
c.
irreversible
d. isobaric

reversible