ELEVATOR-MREC Unit: 801-Final
Exam and Correct Answers 2026
Updated.
what is the name of the scientific principle that allows for operation of a hydraulic elevator?
a. newtons law
b. pascals law
c. fluid dynamics
d. leverage - Answer b. pascals law
when calculating hydraulic system pressure, the force expressed in pounds and the area of the
plunger is measured in square inches. how is the pressure expressed?
a. in ft-pounds
b. in cubic inches
c. in pounds per sq inch
d. in pounds - Answer c. in pounds per sq inch
if a gauge is used to measure system pressure with the elevator at rest and the size of the
plunger is known, how can the total weight of the elevator be calculated?
a. multiply pressure times area
b. divide area by pressure
c. multiply the piston diameter times 3.1416
d. not enough info is given - Answer a. multiply pressure times area
How many cubic inches are there in one gallon?
a. 3.1416
b. 231
c. 321
d. 1724 - Answer b. 231
What is the area of a 6" plunger?
, a. 9.46 sq inches
b. 12.57 sq inches
c. 18.85 sq inches
d. 28.27 sq inches - Answer d. 28.27 sq inches
a weight (force) of 5,000 lbs. is placed on a hydraulic plunger having an area of 25 sq inches.
what is the system pressure?
a. 100 psi
b. 120 psi
c. 160 psi
d. 200 psi - Answer d. 200 psi
how many gallons of oil will be needed to raise a 4" plunger 25 ft?
a. 16.3 gallons
b. 20.8 gallons
c. 54.4 gallons
d. 65.3 gallons - Answer a. 16.3 gallons
how is the duty of a hydraulic elevator rated?
a. speed and capacity
b. vertical rise and capacity
c. number of floors
d. capacity only - Answer a. speed and capacity
when a hydraulic elevator is at rest at floor level, which valve is open?
a. manual lowering valve
b. up valve
c. solenoid pilot valve
c. none- all of the valves must be closed - Answer b. up valve
Exam and Correct Answers 2026
Updated.
what is the name of the scientific principle that allows for operation of a hydraulic elevator?
a. newtons law
b. pascals law
c. fluid dynamics
d. leverage - Answer b. pascals law
when calculating hydraulic system pressure, the force expressed in pounds and the area of the
plunger is measured in square inches. how is the pressure expressed?
a. in ft-pounds
b. in cubic inches
c. in pounds per sq inch
d. in pounds - Answer c. in pounds per sq inch
if a gauge is used to measure system pressure with the elevator at rest and the size of the
plunger is known, how can the total weight of the elevator be calculated?
a. multiply pressure times area
b. divide area by pressure
c. multiply the piston diameter times 3.1416
d. not enough info is given - Answer a. multiply pressure times area
How many cubic inches are there in one gallon?
a. 3.1416
b. 231
c. 321
d. 1724 - Answer b. 231
What is the area of a 6" plunger?
, a. 9.46 sq inches
b. 12.57 sq inches
c. 18.85 sq inches
d. 28.27 sq inches - Answer d. 28.27 sq inches
a weight (force) of 5,000 lbs. is placed on a hydraulic plunger having an area of 25 sq inches.
what is the system pressure?
a. 100 psi
b. 120 psi
c. 160 psi
d. 200 psi - Answer d. 200 psi
how many gallons of oil will be needed to raise a 4" plunger 25 ft?
a. 16.3 gallons
b. 20.8 gallons
c. 54.4 gallons
d. 65.3 gallons - Answer a. 16.3 gallons
how is the duty of a hydraulic elevator rated?
a. speed and capacity
b. vertical rise and capacity
c. number of floors
d. capacity only - Answer a. speed and capacity
when a hydraulic elevator is at rest at floor level, which valve is open?
a. manual lowering valve
b. up valve
c. solenoid pilot valve
c. none- all of the valves must be closed - Answer b. up valve
