Question and answer Powerplant

A

Thermal Energy which is in transit due to a difference in temperature
a. Heat
b. Power
C. Force
d. Steady Flow Work

C

The operating principle of the turbojet engine is the application of?
a. Newton’s First Law
b. Newton’s Second Law
c. Newton’s Third Law
d. Zeroth Law

C

Newton’s first law of motion genrally termed as the “Law of Inertia” states that ___
a. “To every action, there is an equal and opposite reaction.”
b. “Force is proportional to the product of mass and acceleration.”
c. Everybody persists in its state of rest, or of motion in a straight line, unless acted upon by some outside force.”
d. “Two thermodynamic systems are each in thermal equilibrium with a third, then they are in thermal equilibrium with each other”

d

The measurement of a thermodynamic property known as temperature is based on
a. First law
b. Second Law
c. Third Law
d. Zeroth law

a

The measure of disorder in a system is called:
a. Entropy
b. Enthalpy
c. Internal Energy
d. Work non-flow

a

This thermodynamic law states that when a body comes in contact with another body that is at different temperatures, heat is transferred from the hotter body to the colder body until both reach thermal equilibrium.

a. The zeroth law of thermodynamics
b. the first law of thermodynamics
c. The second law of thermodynamics
d. The third law of thermodynamics

b

Energy can neither be created nor destroyed

a. The zeroth law of thermodynamics
b. the first law of thermodynamics
c. The second law of thermodynamics
d. The third law of thermodynamics

b

The one that seperates the substance from its surroundings is called the;
a. border
b. boundary
c. system
d. fluid

d

A system in which there is no exchange of matter with the surroundings and does not cross its boundaries is called a

a. isolated system
b. open system
c. variable system
d. closed system

C

It refers to the quantities that describes and define the thermodynamic substance.
a. weight
b. volume
c. properties
d. Mass

b

Intensive properties are?
a. dependent of the mass
b. independent of the mass
c. remains the same
d. expanded properties of mass

d

Which of the following properties are considered extensive properties?
a. Pressure
b. Density
c. Temperature
d. Force

b

What is the relation between an extensive property B and its corresponding intensive property b?
a. B= m/b, where m is the mass of the system
b. B= m*b, where m is the mass of the system
c. B= m + b, where m is the mass of the system
d. none of the above

a

The mass of a system is 2kg. If the internal energy of this system is U, what is the specific internal energy of this system?
a. U/2
b. U
c. U/4
d. U*2

b

What is the weight of a 66-kgm man, in Newtons, at standard conditions?
a. 66 N
b. 647.46 N
c. 66 kgf
d. 647.46 kgf

b

if the fluid pressure is 800 psi in a ½ inch line supplying an actuating cylinder with an area of 10 square unches, the force exerted on the piston will be
a. 4000 lbs
b. 8000 lbs
c. 800 lbs
d. 400 lbs

a

Using standard atmospheric conditions, the standard sea level temperature is
a. 59 degrees F
b. 59 degrees R
c. 29 degrees C
d. 35 degrees C

a

It is the sum of the gauge pressure and atmospheric pressure
a. Absolute pressure
b. Gauge pressure
c. Vacuum pressure
d. Plenum pressure

c

The force exerted per unit area on the Earth’s surface due to the weight of the air
a. Absolute pressure
b. Density
c. Atmospheric pressure
d. Gauge pressure

b

Convert 47 degree C to degree F
a. 113 deg F
b. 116.6 deg F
c. 117.6 deg F
d. 177.6 deg F

b. 343 K

Convert 70 deg C to K
a. 333 K
b. 343 K
c. 353 K
d. 443 K

c

A compressed spring has a potential energy of 20 J and its spring constant is 200 N/m. Calculate the displacement of the spring.

a. 0.63 m
b. 0.53 m
c. 0.43 m
d. 0.33 m

b

States that if the pressure of a gas remains constant, its volume vanes directly with the absolute temperature.
a. Boyle’s Law
b. Charles’ Law
c. Ideal Gas Law
d. Newton’s Law

a

States that if the temperature of a gas remains constant, its volume varies inversely with the absolute pressure.
a. Boyle’s Law
b. Charles’ Law
c. Ideal Gas Law
d. Newton’s Law

a

When a solid turns into liquid
a. melting
b. Freezing
c. Condensation
d. Sublimation

b

It is a reversible adiabatic thermodynamic process
a. isobaric
b. isentropic
c. isothermal
d. polytrophic

b

The isentropic process is:
a. A process that is both adiabatic and non-reversible
b. A process that is both adiabatic and reversible
c. A process that in which internal energy remains constant
d. The combination of an isobaric, isochoric and isothermal

b

Entropy is also defined as the function of the working substance which remains constant during ___
a. an isochoric process
b. an isentropic process
c. polytropic process
d. an adiabatic process

b

The engine cycle does not require an outside source of ignition
a. Otto cycle
b. Diesel Cycle
c. Brayton Cycle
d. Carnot Cycle

c

Turbojet engine operates on a
a. Carnot Cycle
b. Diesel cycle
c. Brayton cycle
d. Otto cycle

b

Which of the following statements describe the Brayton engine cycle
a. A repeating cycle in which the events happen one after another
b. A linear cycle in which the events happen simultaneously
c. A linear cycle in which the events happen one at a time
d. A repeating cycle in which the events happen two at a time

a

In the P-V diagram of the Brayton Cycle, which parameter is constant
a. Pressure
b. Volume
c. Temperature
d. Entropy