Engineer final Exam Test Questions and Answers Rated A
Conteracts the forces acting parallel to the compressors
What is the main purpose of the Kingsbury thrust?
shaft ( preventing axel displacement.
Capacitors have the ability to ? Store electrical energy that can be used to start motors
What is the purpose of the gland seal system ( turbine Prevents steam from leaking out of the turbine or air
shaft) leaking in
Which of the following would cause the atmospheric valve
High steam condenser pressure
to open?
What causes the atmospheric valve open High steam condenser pressure
How should the seat of a service valve be positioned when
Cracked ott the backseat
a permanent pressure gauge has been installed
A chilled water system is producing cooling with (3) com-
pressors. As the load on the system increases a fourth
Reduction in chilled water temperature
compressor is cycled on. Which of the following takes
place in the system? Reduction in
According to Ashrae standard, which of the following de-
15 feet above the ground level & not less than 20 feet from
scribes how the discharge of a pressure relief valve of a
any window ventilation opening exit in any building
fusible plug must be installed from the ground level
How is the water level in the hot well regulated ? Through
Operation of a recirculating Lon valve and overboard valve
a combined
Which of the following causes the suction compressor
Evaporator pressure
valve to open?
A particular refrigeration system uses a room thermostat
which has been wired to a liquid line solenoid valve. It is
noted that when the room thermostat is satisfied, the liq-
Pumping down of the low side
uid line solenoid closes, but the room temperature contin-
ues to go down. This is due to ———- ing ————
the low side
1/8
, Which device is used to control the capacity of a recipro-
Suction service valve
cating compressor? ———- service ———-.
What device monitors the speed of the turbines shaft ? Tachometer
What type of valve is a emergency over speed trip valve Butterfly valve
When the windings I'm a motor become loose and touch
The motor will short circuit.
the body of the motor what will happen ?
To insure adequate lubrication during startup and shut-
What is the purpose of the auxiliary oil pump ?
down
What device is used to stop a turbine when it exceeds its
Over speed trip valve
maximum rpms
Which of the following correctly list events that take place Reexpansion of hpv, suction valve opens, draw vapor into
during a compressors suction stroke ? 3 things the cylinder.
Ashrae 15 establishes what standards ? Machine room standards
Normally closed solenoid valves are not used with a sys-
4 way switching valve
tem that has what type of valve ?
A pressure temp response mechanism for automatically
stopping the operation of the pressure imposing element Pressure limiting device
is a ?
Cylinder unloaders are designed to ? Unload individual cylinders in response to the load
Which of the following gas is used to pressure test a
Nitrogen
refrigeration circuit?
What pressure relief device can be installed below the
Fusible plug
liquid refrigerant level of the protected vessel ?
Increase capacity of of a centrifugal compressor the op-
Open pre rotational vanes
erator should ?
The best way to install a 90 degree turn hard copper pipe
Buy a 90 degree pipe elbow and braze
is to buy a ————
2/8
Conteracts the forces acting parallel to the compressors
What is the main purpose of the Kingsbury thrust?
shaft ( preventing axel displacement.
Capacitors have the ability to ? Store electrical energy that can be used to start motors
What is the purpose of the gland seal system ( turbine Prevents steam from leaking out of the turbine or air
shaft) leaking in
Which of the following would cause the atmospheric valve
High steam condenser pressure
to open?
What causes the atmospheric valve open High steam condenser pressure
How should the seat of a service valve be positioned when
Cracked ott the backseat
a permanent pressure gauge has been installed
A chilled water system is producing cooling with (3) com-
pressors. As the load on the system increases a fourth
Reduction in chilled water temperature
compressor is cycled on. Which of the following takes
place in the system? Reduction in
According to Ashrae standard, which of the following de-
15 feet above the ground level & not less than 20 feet from
scribes how the discharge of a pressure relief valve of a
any window ventilation opening exit in any building
fusible plug must be installed from the ground level
How is the water level in the hot well regulated ? Through
Operation of a recirculating Lon valve and overboard valve
a combined
Which of the following causes the suction compressor
Evaporator pressure
valve to open?
A particular refrigeration system uses a room thermostat
which has been wired to a liquid line solenoid valve. It is
noted that when the room thermostat is satisfied, the liq-
Pumping down of the low side
uid line solenoid closes, but the room temperature contin-
ues to go down. This is due to ———- ing ————
the low side
1/8
, Which device is used to control the capacity of a recipro-
Suction service valve
cating compressor? ———- service ———-.
What device monitors the speed of the turbines shaft ? Tachometer
What type of valve is a emergency over speed trip valve Butterfly valve
When the windings I'm a motor become loose and touch
The motor will short circuit.
the body of the motor what will happen ?
To insure adequate lubrication during startup and shut-
What is the purpose of the auxiliary oil pump ?
down
What device is used to stop a turbine when it exceeds its
Over speed trip valve
maximum rpms
Which of the following correctly list events that take place Reexpansion of hpv, suction valve opens, draw vapor into
during a compressors suction stroke ? 3 things the cylinder.
Ashrae 15 establishes what standards ? Machine room standards
Normally closed solenoid valves are not used with a sys-
4 way switching valve
tem that has what type of valve ?
A pressure temp response mechanism for automatically
stopping the operation of the pressure imposing element Pressure limiting device
is a ?
Cylinder unloaders are designed to ? Unload individual cylinders in response to the load
Which of the following gas is used to pressure test a
Nitrogen
refrigeration circuit?
What pressure relief device can be installed below the
Fusible plug
liquid refrigerant level of the protected vessel ?
Increase capacity of of a centrifugal compressor the op-
Open pre rotational vanes
erator should ?
The best way to install a 90 degree turn hard copper pipe
Buy a 90 degree pipe elbow and braze
is to buy a ————
2/8
