815, 845, 840 NEIEP 800 EXAM:AN A+ GUIDE WITH
LATEST KEY QUESTIONS AND ANSWERS
See if it will run down by opening the manual lowering valve
If a hydraulic elevator will not run down, what is the first thing you should try?
In pounds per square inch
When calculating hydraulic system pressure, the force is expressed in pounds and the area of
the plunger is measured in square inches. How is the pressure expressed?
Pascal's Law
What is the name of the scientific principle that allows a hydraulic elevator to operate?
Every year
How often must a static load test be performed?
Multiply pressure times area
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?
231
How many cubic inches are there in one gallon?
28.27 square inches
What is the area of a 6" plunger?
200 psi
A weight (force) of 5,000 lbs. is placed on a hydraulic plunger having an area of 25 square
inches. What is the system pressure?
16.3 gallons
How many gallons of oil will be needed to raise a 4" plunger 25 feet?
Speed and capacity
How is the duty of a hydraulic elevator rated?
Up valve
When a hydraulic elevator is at rest at floor level, what valves are open?
, Up transition
What is another term for up slowdown?
To prevent oil from flowing from the jack to the reservoir
Why is a check valve required?
Rate of flow in gpm
What determines the full speed of a hydraulic elevator?
The down valve is closed, the check valve is closed, and the up valve is open
Which describes the operation of a typical hydraulic block valve with an elevator landed at the
floor?
Full load up pressure
What is the definition of "working pressure"?
Up start bypass and relief valve
What two functions are combined into a single valve?
The up limit switches
In order to perform a plunger stop test, which circuits would have to be jumpered out?
Check for oil in the reservoir
If the pump makes a hammering noise, what would be the first thing to check?
An underground leak
You pull the main line disconnect switch and close the line shutoff; the car slowly drifts
downward. You don't observe any oil leaking anywhere. What does this indicate?
carriage, seat, and track
What are the three major components that make up a stairway chairlift?
The rise must be less than the tread
In order for a stairway to be less than the maximum allowable angle for a stairway chairlift
installation, what must the relationship between the rise and the tread be?
45
According to code, what is the highest degree angle stairway onto which a chairlift can be
installed?
LATEST KEY QUESTIONS AND ANSWERS
See if it will run down by opening the manual lowering valve
If a hydraulic elevator will not run down, what is the first thing you should try?
In pounds per square inch
When calculating hydraulic system pressure, the force is expressed in pounds and the area of
the plunger is measured in square inches. How is the pressure expressed?
Pascal's Law
What is the name of the scientific principle that allows a hydraulic elevator to operate?
Every year
How often must a static load test be performed?
Multiply pressure times area
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?
231
How many cubic inches are there in one gallon?
28.27 square inches
What is the area of a 6" plunger?
200 psi
A weight (force) of 5,000 lbs. is placed on a hydraulic plunger having an area of 25 square
inches. What is the system pressure?
16.3 gallons
How many gallons of oil will be needed to raise a 4" plunger 25 feet?
Speed and capacity
How is the duty of a hydraulic elevator rated?
Up valve
When a hydraulic elevator is at rest at floor level, what valves are open?
, Up transition
What is another term for up slowdown?
To prevent oil from flowing from the jack to the reservoir
Why is a check valve required?
Rate of flow in gpm
What determines the full speed of a hydraulic elevator?
The down valve is closed, the check valve is closed, and the up valve is open
Which describes the operation of a typical hydraulic block valve with an elevator landed at the
floor?
Full load up pressure
What is the definition of "working pressure"?
Up start bypass and relief valve
What two functions are combined into a single valve?
The up limit switches
In order to perform a plunger stop test, which circuits would have to be jumpered out?
Check for oil in the reservoir
If the pump makes a hammering noise, what would be the first thing to check?
An underground leak
You pull the main line disconnect switch and close the line shutoff; the car slowly drifts
downward. You don't observe any oil leaking anywhere. What does this indicate?
carriage, seat, and track
What are the three major components that make up a stairway chairlift?
The rise must be less than the tread
In order for a stairway to be less than the maximum allowable angle for a stairway chairlift
installation, what must the relationship between the rise and the tread be?
45
According to code, what is the highest degree angle stairway onto which a chairlift can be
installed?
