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Topics 3 Terms > Topics 3 Terms > Flashcards

Topics 3 Terms Flashcards

1
Q

States that if the temperature of a
given quantity of gas is held constant,
the volume of the gas varies inversely
with the absolute pressure during a
change of state.
a. Daltons Law
b. Charles’ Law
c. First Law Thermodynamics
d. Boyle’s Law

A

b. Boyle’s low

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2
Q

A unit of force that produces unit
acceleration (in ft/s²) in a unit mass (in
lbm)
a. Pound
b. Newton
c. Dyne
d. Poundal

A

d. Poundal

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3
Q

The work done by the steam during a
reversible adiabatic expansion process
in the turbine
a. Actual Fluid work
b. Brake work
c. Ideal work
d. Combined work

A

c. Ideal work

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4
Q

The work is done in pushing a fluid
across a boundary, usually into or out
of a system is called _____
a. Kinetic Energy
b. Internal Energy
c. Potential Energy
d. Flow Energy

A

d. Flow Energy

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5
Q

Energy balance for steady flow process
is:
a. Energy (in) = change in total energy
b. Energy (in) = Energy (out)
c. Energy (in) – Energy (out) = change in total
energy
d. Energy (in) + Energy (out) = change in total
energy

A

b. Energy (in) = Energy (out)

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6
Q

________ is a composite property applicable to
all fluids and is defined by sum of internal
energy and the product of pressure and volume.
a. Work
b. Enthalpy
c. Total Work
d. Heat

A

b. Enthalpy

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7
Q

States that energy is neither created nor
destroyed; it can only change forms.
a. First Law of Thermodynamics
b. Zeroth Law of Thermodynamics
c. Daltons Law
d. Archimedes Principle

A

a. First Law of Thermodynamics

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8
Q

Heat is defined as form energy that is
transferred between two systems by
the virtue of a _______.
a. Volume difference
b. Mass difference
c. Temperature difference
d. Pressure difference

A

c. Temperature difference

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9
Q

What is the model cycle for spark
ignition engine
a. Diesel cycle
b. Brayton cycle
c. Otto cycle
d. Carnot cycle

A

c. Otto cycle

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10
Q

When four events takes place in one
revolution of a crank shaft of an
engine, the engine is a called
a. Rotary engine
b. Steam engine
c. 2- stroke cycle engine
d. 4- stroke cycle engine

A

c. 2- stroke cycle engine

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11
Q

The distance that can piston travel in
one direction
a. Bore
b. Stroke
c. Clearance
d. Displacement

A

b. Stroke

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12
Q

The position of piston when it forms
the largest volume in the cylinder
a. Crank End dead center position
b. Head End dead center position
c. Top Dead center position
d. Clearance volume

A

a. Crank End dead center position

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13
Q

The ideal cycle for the compression –
ignition reciprocating engines
a. Otto cycle
b. Diesel cycle
c. Dual cycle
d. Carnot cycle

A

b. Diesel cycle

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14
Q

The ratio of the actual partial pressure exerted
by the water vapor in any volume of air to the
partial pressure that would be exerted by the
water vapor in the air is saturated at the
temperature of the air
a. Absolute humidity
b. Humidity ratio
c. Saturation ratio
d. Relative humidity

A

d. Relative humidity

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15
Q

An expression of the mass of water
vapor per unit mass of dry air
a. Saturation ratio
b. Absolute humidity
c. Relative humidity
d. Humidity ratio

A

d. Humidity ratio

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16
Q

Which of the following is equivalent to 1lb?
D. 8000 grains
B. 6000 grains
A. 5000 grains
C. 7000 grains

A

C. 7000 grains

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17
Q

The ratio of the actual vapor density to the vapor density
at saturation
D. Saturation ratio
B. Absolute humidity
C. Humidity ratio
A. Relative humidity

A

A. Relative humidity

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18
Q

Sometimes called specific humidity
D. Saturation ratio
B. Absolute humidity
A. Relative humidity
C. Humidity ratio

A

C. Humidity ratio

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19
Q

For any given barometric pressure, the humidity ratio is a
function of the
C. Dry bulb temperature
A. Critical temperature
D. Wet bulb temperature
B. Dew point temperature

A

B. Dew point temperature

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20
Q

The humidity ratio corresponding to any given dew point
temperature varies with the total barometric pressure,
increasing as the barometric pressure
A. Increases
D. Constant
C. Varies
B. Decreases

A

B. Decreases

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21
Q

In a sensible heating process the final humidity ratio is:
A. Increased
D. Cannot be determined
B. Decreased
C. The same

A

C. The same

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22
Q

Cooling and dehumidifying process is commonly used for:
C. Winter cooling
D. Heat pumping
B. Ice making
A. Summer air conditioning

A

A. Summer air conditioning

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23
Q

An adiabatic saturation process is also known as:
C. Constant DP temperature process
D. Constant vapor temperature process
B. Constant DB temperature process
A. Constant WB temperature process

A

A. Constant WB temperature process

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24
Q

The process of simultaneous heating and dehumidifying is
known as:
B. Cooling and dehumidifying
C. Sensible cooling
A. Sensible heating
D. Chemical dehumidifying

A

D. Chemical dehumidifying

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25
Q

The process in increasing the dry-bulb temperature
without changing the humidity ratio is known as:
B. Cooling and dehumidifying
C. Sensible cooling
D. Heating and dehumidifying
A. Sensible heating

A

A. Sensible heating

26
Q

The process of simultaneous cooling and decreasing of
humidity ratio is known as:
A. Sensible cooling
B. Cooling and humidifying
D. Heating and dehumidifying
C. Cooling and dehumidifying

A

C. Cooling and dehumidifying

27
Q

The process of cooling without changing the humidity ratio
is known as:
A. Sensible cooling
B. Cooling and dehumidifying
D. Heating and humidifying
C. Sensible cooling

A

C. Sensible cooling

28
Q

The process of simultaneous heating and humidifying ratio
is known as:
A. Sensible cooling
B. Cooling and humidifying
D. Heating and dehumidifying
C. Heating and humidifying

A

C. Heating and humidifying

29
Q

Energy added to a vapor is known as a latent heat of
vaporization
B. Sensible heat of vapor
C. Superheat
D. B and C
A. Latent heat of vaporization

A

C. Superheat

30
Q

The power required to deliver a given quantity of fluid
against a given head with no losses in the pump is called
A. Wheel power
C. Hydraulic power
D. Indicated power
B. Brake power

A

C. Hydraulic powe

31
Q

The law that states “Entropy of all perfect crystalline solids
is zero at absolute zero temperature”
A. Zeroth law of thermodynamic
D. Third law of thermodynamics
C. Second law of thermodynamics
B. First law of thermodynamics

A

D. Third law of thermodynamics

32
Q

When two bodies, isolated from other environment, are in
thermal equilibrium with a third body, the two are in
thermal equilibrium with each other.
B. First law of thermodynamicsr
A. Zeroth law of thermodynamic
D. Third law of thermodynamics
C. Second law of thermodynamics

A

A. Zeroth law of thermodynamic

33
Q

The sum of the energies of all the molecules in a system
where energies appear in several complex forms is the
A. Kinetic energy
B. Internal energy
D. Friction energy
C. Potential energy

A

B. Internal energy

34
Q

The quantity of heat required to raise the temperature of
one pound of water one degree Fahrenheit at standard
conditions.
D. Centigrade
A. Btu
C. Joule
B. Calorie

A

A. Btu

35
Q

It consists of a wet and dry bulb thermometers mounted
on a strip of metal
C. Pyrometer
D. Sling psychrometer
B. Gyrometer
A. Manometer

A

D. Sling psychrometer

36
Q

A manometer is an instrument that is used to measure:
D. Air volume
A. Air pressure
C. Heat radiation
B. Condensate water level

A

A. Air pressure

37
Q

The relationship of water vapor in the air at the dew point
temperature to the amount that should be in the air if the
air were saturated at the dry-bulb temperature is:
D. Run faster
A. Partial pressure actual dew point
C. Relative humidity
B. Percentage humidity

A

A. Partial pressure actual dew point

38
Q

Heat added to or removed from a substance that cause a
change of temperature:
A. Absolute heat
D. Sensible heat
C. Specific heat
B. Latent heat

A

D. Sensible heat

39
Q

When measuring ____________ of air, the bulb of the
thermometer should be shaded to reduce the effect of
direct radiation
B. Wet bulb temperature
A. Dry bulb temperature
C. Critical temperature
D. Saturation temperature

A

A. Dry bulb temperature

40
Q

An ordinary thermometer whose bulb is enclosed in a
wetted cloth sac or wick
A. Dry bulb thermometer
B. Wet bulb thermometer
C. Ordinary thermometer
D. Mercury thermometer

A

B. Wet bulb thermometer

41
Q

The measure of the relationship between the dry bulb and
dewpoint temperature of the air and as such, it provides a
convenient means of
Dewpoint temperature of the air when the dry bulb
temperature is known
D. Relative humidity
A. Wet bulb temperature
B. Saturation temperature
C. Humidity ratio

A

A. Wet bulb temperature

42
Q

temperatureAn index of the total heat (enthalpy) of the air
B. Saturation temperature
A. Wet bulb temperature
C. Dry bulb temperature
D. Dewpoint temperature

A

A. Wet bulb temperature

43
Q

The sensible heat of the air is a function of the
A. Wet bulb temperature
B. Dry bulb temperature
C. Dewpoint temperature
D. Saturation temperature

A

B. Dry bulb temperature

44
Q

The latent heat of the air is a function of the
A. Wet bulb temperature
C. Dewpoint temperature
B. Dry bulb temperature
D. Saturation temperature

A

C. Dewpoint temperature

45
Q

The head required to produced a flow of the water.
B. pressure head
C. velocity head
D. dynamic head
A. static head

A

C. velocity head

46
Q

The sum of the pressure head and velocity head.
B. pressure head
D. dynamic head
C. velocity head
A. static head

A

D. dynamic head

47
Q

The removal of heat from compressed air between stages
of compression.
B. exhaustion
D. intercooling
A. regeneration
C. heat evacuation

A

D. intercooling

48
Q

The interaction that occurs between a system and its
surroundings as the system executes a process, which is
the result of the system being at the temperature different
from the surrounding is
A. mass transfer
B. heat transfer
C. work transfer
D. none of the above

A

B. heat transfer

49
Q

___ is obtained by mixing and burning precisely the right
amount of fuel and oxygen so that products are left once
combustion is complete
B. burning combustion
A. perfect combustion
C. firing combustion
D. burning combustion

A

A. perfect combustion

50
Q

What type of boiler commonly used in industrial and heavy
commercial application due to less expensive to make low
pressure, easier to maintain and repair
A. water tube boiler
B. fire tube boiler
C. air tube boiler
D. marine water

A

B. fire tube boiler

51
Q

in cooling cycle, the dry bulb temp (db) of the air is lowered,
what will happens to the relative humidity
B. decreases
A. increased
C. remains constant
D. increases or decreases depending on the temperature at
which it is cooled

A

A. increased

52
Q

The ratio of the actual partial pressure exerted by the water
vapor in any volume of air to the partial pressure that would
be exerted by the water vapor in the air is saturated at the
temperature of the air
B. absolute humidity
A. relative humidity
C. humidity ratio
D. saturation ratio

A

A. relative humidity

53
Q

In sensible heating the absolute humidity remains constant
but the relative humidity
B. remains constant
C. decreases
A. increases
D. zero

A

C. decreases

54
Q

The relative humidity becomes 100% and where the water
vapor start to condense
B. saturated point
A. dew point
C. cloud point
D. critical point

A

A. dew point

55
Q

the measure of a fluids resistance to flow(the internal
friction of a fluid) as temperature increase.
A. Density
B. Viscosity
D. Temperature
C. Specific gravity

A

B. Viscosity

56
Q

A hot block is cooled by blowing cool air over its top surface.
The heat that is first transferred to the air layer close to the
block is by conduction. It is eventually carried away from the
surface by:
C. Conduction
A. Convection
D. Thermal
B. Radiation

A

A. Convection

57
Q

The effectiveness of a body as a thermal radiator at a given
temperature.
A. Absorptivity
B. Emissivity
C. Conductivity
D. Reflectivity

A

B. Emissivity

58
Q

Any arrangement whereby steam is bled from a turbine for a
purpose of thermal regeneration of the condensate to a
temperature level approaching that of the boiler water.
B. Extraction cycle
A. Regenerative
D. Regenerative extraction cycle
C. Bled-off steam cycle

A

A. Regenerative

59
Q

The following factors are necessary to define a
thermodynamic cycle expect
A. The working substance
C. The time it takes to complete the cycle
D. The means of doing work on the system
B. High and low temperature reservoirs

A

C. The time it takes to complete the cycle

60
Q

The substance employed as cooling effect to absorb heat
from the refrigerated space in called
D. Moisture
C. Refrigerant
B. Feedwater
A. Condensate

A

C. Refrigerant

Topics 3 Terms (1 decks)

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