NYC RMO EXAM, CHAPTER 26
(Troubleshooting) EXAM REVIEW
QUESTIONSWITH CORRECT
SOLUTIONS UPDATED 2025/2026
SYLLABUS ALREADY GRADED!!100%
GUARANTEED PASS!!!<<BRAND
NEW VERSION>>
26.1.) The following is an indication that a system's cooling tower is not operating
as designed. - ANSWER ✓ High head pressure
26.2.) Of the following conditions, the one that would not result in high discharge
pressure would be? - ANSWER ✓ Gas in the liquid line
26.3.) An air-cooled package AC unit is operating with dirty condenser filters.
This condition would result in? - ANSWER ✓ High head pressure at the
compressor
26.4.) If the liquid seal in a receiver is lost, the following will occur? - ANSWER
✓ Non-condensed hot vapor will go into the liquid line
26.5.) While monitoring the operation of a refrigeration system that uses a
reciprocating compressor, it is determined that the unit cycling times are normal
but the compressor discharge pressure and temperature are outside of their normal
operating range. Under these conditions the system should be inspected for? -
ANSWER ✓ Poor condenser operation/dirty tubes
26.6.) An obstruction, partially blocking the liquid line between the receiver and
the metering device may cause? - ANSWER ✓ Frost between blockage and
metering device
, 26.7.) Superheating protects the compressor from non-compressible liquid
refrigerant. What would the RMO notice if there was liquid refrigerant at the
compressor suction? - ANSWER ✓ Frost forming on the suction line
26.8.) Which of the following would explain why an insufficient amount of oil
was returning to a compressor? - ANSWER ✓ The velocity of the refrigerant is too
low
26.9.) A comfort cooling system has a Freon 12 condensing unit. If the system is
overcharged how will it affect the system? - ANSWER ✓ Suction and discharge
pressure will increase
26.10.) Which of the following would cause a compressor to short cycle? -
ANSWER ✓ Shortage of refrigerant
26.11.) On a particular system a sightglass is installed in the liquid line just before
the expansion valve. Upon inspection, bubbles are seen. This is an indication of? -
ANSWER ✓ There is a shortage of refrigerant
26.12.) If the liquid line of a compression system is warmer than usual, this is an
indication that? - ANSWER ✓ There is a shortage of refrigerant
26.13.) If the belt that drives a compressor is too tight, which of the following may
result? - ANSWER ✓ The motor will overheat
26.14.) Because a three phase electric motor is considered a "balanced electrical
load" there must be equal voltage across each winding. How will an unbalanced
power source affect the operation of the motor? - ANSWER ✓ The motor will
overheat
26.15.) Failure to maintain adequate water treatment in a condenser water system
can result in? - ANSWER ✓ High head pressure
26.16.) Which of the following will not cause an excessive loss of water from the
cooling tower? - ANSWER ✓ Reduced airflow
(Troubleshooting) EXAM REVIEW
QUESTIONSWITH CORRECT
SOLUTIONS UPDATED 2025/2026
SYLLABUS ALREADY GRADED!!100%
GUARANTEED PASS!!!<<BRAND
NEW VERSION>>
26.1.) The following is an indication that a system's cooling tower is not operating
as designed. - ANSWER ✓ High head pressure
26.2.) Of the following conditions, the one that would not result in high discharge
pressure would be? - ANSWER ✓ Gas in the liquid line
26.3.) An air-cooled package AC unit is operating with dirty condenser filters.
This condition would result in? - ANSWER ✓ High head pressure at the
compressor
26.4.) If the liquid seal in a receiver is lost, the following will occur? - ANSWER
✓ Non-condensed hot vapor will go into the liquid line
26.5.) While monitoring the operation of a refrigeration system that uses a
reciprocating compressor, it is determined that the unit cycling times are normal
but the compressor discharge pressure and temperature are outside of their normal
operating range. Under these conditions the system should be inspected for? -
ANSWER ✓ Poor condenser operation/dirty tubes
26.6.) An obstruction, partially blocking the liquid line between the receiver and
the metering device may cause? - ANSWER ✓ Frost between blockage and
metering device
, 26.7.) Superheating protects the compressor from non-compressible liquid
refrigerant. What would the RMO notice if there was liquid refrigerant at the
compressor suction? - ANSWER ✓ Frost forming on the suction line
26.8.) Which of the following would explain why an insufficient amount of oil
was returning to a compressor? - ANSWER ✓ The velocity of the refrigerant is too
low
26.9.) A comfort cooling system has a Freon 12 condensing unit. If the system is
overcharged how will it affect the system? - ANSWER ✓ Suction and discharge
pressure will increase
26.10.) Which of the following would cause a compressor to short cycle? -
ANSWER ✓ Shortage of refrigerant
26.11.) On a particular system a sightglass is installed in the liquid line just before
the expansion valve. Upon inspection, bubbles are seen. This is an indication of? -
ANSWER ✓ There is a shortage of refrigerant
26.12.) If the liquid line of a compression system is warmer than usual, this is an
indication that? - ANSWER ✓ There is a shortage of refrigerant
26.13.) If the belt that drives a compressor is too tight, which of the following may
result? - ANSWER ✓ The motor will overheat
26.14.) Because a three phase electric motor is considered a "balanced electrical
load" there must be equal voltage across each winding. How will an unbalanced
power source affect the operation of the motor? - ANSWER ✓ The motor will
overheat
26.15.) Failure to maintain adequate water treatment in a condenser water system
can result in? - ANSWER ✓ High head pressure
26.16.) Which of the following will not cause an excessive loss of water from the
cooling tower? - ANSWER ✓ Reduced airflow
