Frames and AC Quiz with Complete Solutions
A receiver dryer store is refrigerant dries refrigerant and what else - ANSWER-Filters
A semi oscillating hitch allows for what amount of degrees of horizontal movement -
ANSWER-3 to 6°
A shunt or yard truck has what unique function to its fifth wheel - ANSWER-Airlift
An air slider piston has good air supply, but is not unlocking what is the most likely
cause? - ANSWER-Seized locks
Convection and radiation or two methods of transferring heat what is the third? -
ANSWER-Conduction
How are multiple cooling zones achieved in a reefer van? - ANSWER-Bulkhead dividers
with doors and multiple evaporators
How many pivot points does an a train have? - ANSWER-Three
How much oil should be in an AC system? - ANSWER-Manufacture specs
If air is allowed to stay in a system when installing refrigerant, what will happen? -
ANSWER-Hard to fill and high system pressure
If airflow is low across the condenser. How is the compressor protected from too high of
pressure? - ANSWER-High pressure cut out switch
If the evaporator is allowed to drop to a temperature below freezing, what may happen -
ANSWER-Evaporated will freeze up
In modern AC systems, what is normally used to protect the system from lack of oil -
ANSWER-Low pressure cut out switch
The compound gauge is connected to which side of the system - ANSWER-Low side
The refrigerant in the condenser does what to heat in the surrounding air - ANSWER-
Gives off heat to the surrounding air
The refrigerant in the evaporator is typically a blank state under blank pressure -
ANSWER-The refrigerant in the evaporator is typically a liquid state under low pressure
The term compound gauge refers to what - ANSWER-A gauge that measures both
positive and negative pressures
The thermostat control of an AC system is located at the - ANSWER-Evaporator
, The top plate of a fifth wheel has a minor 1 inch crack along the load bearing surface.
What is done to correct this? - ANSWER-Replace the top plate
The TXV's function is to - ANSWER-Create a pressure drop
To change 1 pound of water into steam how many BTUs are required - ANSWER-970
What are the three positions of the service valve and the purpose of each position -
ANSWER-Forward seat - isolate compressor
Middle seat- service position
Back seated - normal operating position
What are the three types of TXV valves - ANSWER-Internal
External
H block
What can cause a high pressure situation on both low and high sides? - ANSWER-
Clogged condenser and evaporator
What can cause poor cooling performance in an AC system? - ANSWER-Low
refrigerant levels
Dirty condenser
Faulty compressor
What colour is the 134 a container? - ANSWER-Light blue
What component is needed to switch between heating and cooling cycles? - ANSWER-
Solenoids or three-way valve
What component is responsible for removing the heat from the refrigerant? - ANSWER-
Condenser
What component must always be replaced when the system is opened - ANSWER-
Receiver dryer
What controls the flow of coolant into the heater core - ANSWER-Hot/cold valve
What do tanker trailers carry other than fuel? - ANSWER-Concrete powder
What does the binary switch sense? - ANSWER-System pressure
What does the expansion valve provide? - ANSWER-A decrease in pressure
A receiver dryer store is refrigerant dries refrigerant and what else - ANSWER-Filters
A semi oscillating hitch allows for what amount of degrees of horizontal movement -
ANSWER-3 to 6°
A shunt or yard truck has what unique function to its fifth wheel - ANSWER-Airlift
An air slider piston has good air supply, but is not unlocking what is the most likely
cause? - ANSWER-Seized locks
Convection and radiation or two methods of transferring heat what is the third? -
ANSWER-Conduction
How are multiple cooling zones achieved in a reefer van? - ANSWER-Bulkhead dividers
with doors and multiple evaporators
How many pivot points does an a train have? - ANSWER-Three
How much oil should be in an AC system? - ANSWER-Manufacture specs
If air is allowed to stay in a system when installing refrigerant, what will happen? -
ANSWER-Hard to fill and high system pressure
If airflow is low across the condenser. How is the compressor protected from too high of
pressure? - ANSWER-High pressure cut out switch
If the evaporator is allowed to drop to a temperature below freezing, what may happen -
ANSWER-Evaporated will freeze up
In modern AC systems, what is normally used to protect the system from lack of oil -
ANSWER-Low pressure cut out switch
The compound gauge is connected to which side of the system - ANSWER-Low side
The refrigerant in the condenser does what to heat in the surrounding air - ANSWER-
Gives off heat to the surrounding air
The refrigerant in the evaporator is typically a blank state under blank pressure -
ANSWER-The refrigerant in the evaporator is typically a liquid state under low pressure
The term compound gauge refers to what - ANSWER-A gauge that measures both
positive and negative pressures
The thermostat control of an AC system is located at the - ANSWER-Evaporator
, The top plate of a fifth wheel has a minor 1 inch crack along the load bearing surface.
What is done to correct this? - ANSWER-Replace the top plate
The TXV's function is to - ANSWER-Create a pressure drop
To change 1 pound of water into steam how many BTUs are required - ANSWER-970
What are the three positions of the service valve and the purpose of each position -
ANSWER-Forward seat - isolate compressor
Middle seat- service position
Back seated - normal operating position
What are the three types of TXV valves - ANSWER-Internal
External
H block
What can cause a high pressure situation on both low and high sides? - ANSWER-
Clogged condenser and evaporator
What can cause poor cooling performance in an AC system? - ANSWER-Low
refrigerant levels
Dirty condenser
Faulty compressor
What colour is the 134 a container? - ANSWER-Light blue
What component is needed to switch between heating and cooling cycles? - ANSWER-
Solenoids or three-way valve
What component is responsible for removing the heat from the refrigerant? - ANSWER-
Condenser
What component must always be replaced when the system is opened - ANSWER-
Receiver dryer
What controls the flow of coolant into the heater core - ANSWER-Hot/cold valve
What do tanker trailers carry other than fuel? - ANSWER-Concrete powder
What does the binary switch sense? - ANSWER-System pressure
What does the expansion valve provide? - ANSWER-A decrease in pressure
