Millwright – Hydraulics: Questions & Solutions
What is pressure defined as? ✔️Ans - Force per unit area F=(P)(A)
What is the pressure of the Earth's atmosphere at sea level? ✔️Ans - 14.7
psi
How is power defined?
A. The rate or velocity at which power is done
B. The rate or velocity at which work is created
C. The speed of the velocity in a power system
D. The rate or speed at which work is done. ✔️Ans - D. The rate or speed at
which work is done.
What is a watt?
A. watt is one newton lifted 1 m in one second.
B. Power unit defined by its work
C. Watt is 1 N lifted 1 cm in one second
D. One jule per second squared ✔️Ans - A. watt is one newton lifted 1 m in
one second.
What is one horsepower equal to? ✔️Ans - 1 horsepower is equal to 746
Watts or 33000 pounds lifted one foot in one minute.
What is the law of conservation of energy?
A. Energy cannot be destroyed, but it may be created from one form to
another.
B. Energy cannot be destroyed, but it may be converted from one form to
another.
C. Energy can be destroyed, but cant be converted from one form to
another
D. Energy cannot be destroyed, but it may be transformed to another form
of power ✔️Ans - B. Energy cannot be destroyed, but it may be converted
from one form to another.
How much does hydraulic fluid compress?
A. Hydraulic fluid compresses about 0.5% at 10000 psi.
B. Hydraulic fluid compresses about 0.5% at 1000 psi.
, C. Hydraulic fluid compresses about 0.5% at 1000 kPa.
D. Hydraulic fluid compresses about 0.15% at 1000 psi. ✔️Ans - B.
Hydraulic fluid compresses about 0.5% at 1000 psi.
What is Pascal's Law?
A. When pressure is applied to a confined liquid at rest, force is transmitted
equally in every direction and always at right angles to the containing
surface.
B. When pressure is applied to a confined liquid at rest force is transmitted
equally in all directions
C. The law of pressure
D. The law of fluid pressur ✔️Ans - A. When pressure is applied to a
confined liquid at rest, force is transmitted equally in every direction and
always at right angles to the containing surface.
How many cubic inches in one US gallon?
A. 231
B. 567
C. 245
D. 223 ✔️Ans - A. 231
How many cubic inches in 1 imperial gallon? ✔️Ans - 277 cubic inches
What is the definition of fluid velocity?
A. Pressure velocity refers to the average speed in a particular direction of
the hydraulic fluid passing a given point. This is the distance traveled by
the fluid in a unit of time.
B. Fluid velocity refers to the average speed in a particular direction of the
hydraulic fluid passing a given point. This is the distance traveled by the
fluid in a unit of time.
C. Fluid velocity refers to the average speed in a one direction of the
hydraulic fluid passing a given point. This is the distance traveled by the
fluid.
D. Fluid velocity refers to the average speed in a particular direction of the
hydraulic fluid passing a given point. This is the distance traveled by the
fluid in a unit of time. ✔️Ans - A. Pressure velocity refers to the average
speed in a particular direction of the hydraulic fluid passing a given point.
This is the distance traveled by the fluid in a unit of time.
What is pressure defined as? ✔️Ans - Force per unit area F=(P)(A)
What is the pressure of the Earth's atmosphere at sea level? ✔️Ans - 14.7
psi
How is power defined?
A. The rate or velocity at which power is done
B. The rate or velocity at which work is created
C. The speed of the velocity in a power system
D. The rate or speed at which work is done. ✔️Ans - D. The rate or speed at
which work is done.
What is a watt?
A. watt is one newton lifted 1 m in one second.
B. Power unit defined by its work
C. Watt is 1 N lifted 1 cm in one second
D. One jule per second squared ✔️Ans - A. watt is one newton lifted 1 m in
one second.
What is one horsepower equal to? ✔️Ans - 1 horsepower is equal to 746
Watts or 33000 pounds lifted one foot in one minute.
What is the law of conservation of energy?
A. Energy cannot be destroyed, but it may be created from one form to
another.
B. Energy cannot be destroyed, but it may be converted from one form to
another.
C. Energy can be destroyed, but cant be converted from one form to
another
D. Energy cannot be destroyed, but it may be transformed to another form
of power ✔️Ans - B. Energy cannot be destroyed, but it may be converted
from one form to another.
How much does hydraulic fluid compress?
A. Hydraulic fluid compresses about 0.5% at 10000 psi.
B. Hydraulic fluid compresses about 0.5% at 1000 psi.
, C. Hydraulic fluid compresses about 0.5% at 1000 kPa.
D. Hydraulic fluid compresses about 0.15% at 1000 psi. ✔️Ans - B.
Hydraulic fluid compresses about 0.5% at 1000 psi.
What is Pascal's Law?
A. When pressure is applied to a confined liquid at rest, force is transmitted
equally in every direction and always at right angles to the containing
surface.
B. When pressure is applied to a confined liquid at rest force is transmitted
equally in all directions
C. The law of pressure
D. The law of fluid pressur ✔️Ans - A. When pressure is applied to a
confined liquid at rest, force is transmitted equally in every direction and
always at right angles to the containing surface.
How many cubic inches in one US gallon?
A. 231
B. 567
C. 245
D. 223 ✔️Ans - A. 231
How many cubic inches in 1 imperial gallon? ✔️Ans - 277 cubic inches
What is the definition of fluid velocity?
A. Pressure velocity refers to the average speed in a particular direction of
the hydraulic fluid passing a given point. This is the distance traveled by
the fluid in a unit of time.
B. Fluid velocity refers to the average speed in a particular direction of the
hydraulic fluid passing a given point. This is the distance traveled by the
fluid in a unit of time.
C. Fluid velocity refers to the average speed in a one direction of the
hydraulic fluid passing a given point. This is the distance traveled by the
fluid.
D. Fluid velocity refers to the average speed in a particular direction of the
hydraulic fluid passing a given point. This is the distance traveled by the
fluid in a unit of time. ✔️Ans - A. Pressure velocity refers to the average
speed in a particular direction of the hydraulic fluid passing a given point.
This is the distance traveled by the fluid in a unit of time.
