RMO Questions 110-222

180. How long does it take to warm up a steam turbine? A. 10-15 minutes B. 30-40 minutes C. No less than 60 minutes D. Doesn't need warm-up

A. 10-15 minutes

198. A technician has been asked to estimate the cost of operating a 5 horse power motor. Because the plant is build by energy consumed as kilowatt-hours, the technician will have to calculate the conversion. The equivalent in energy of a 5 horse power motor operating for 9 hours in kilowatt hours is closest to: A. 33.6 B. 4.79 C. 3.73 D. 11.9

A. 33.6

200. A circuit breaker has a similar function as what? A. A fuse B. A solenoid C. A resistor D. A relay

A. A fuse

192. The cooling medium for a cooling tower is? A. Air B. Water C. Air and water D. Tower fan

A. Air

178. What type of sprinkler system needs inspecting? A. Automatic B. Non-automatic C. Residential D. Commercial, hotel& office buildings

A. Automatic

144. Where is the muffler located? A. Between the compressor and condenser B. Between the evaporator and condenser C. After the condenser D. Before the compressor

A. Between the compressor and condenser

166. What are pre hot works procedures performed prior to hot works? A. Check area once a day leading up to hot works B. Check area one week prior to hot works C. Check area day of hot works D. Check area day after hot works

A. Check area once a day leading up to hot works

131. A high-side float valve is used to maintain: A. Constant level of refrigerant in the evaporator B. Constant rate of refrigerant flow C. Constant flow of condenser water D. Constant level of refrigerant in condenser

A. Constant level of refrigerant in the evaporator

183. In the absence of water chemical treatment of a cooling tower? A. Drain the tower every one to two weeks & replace with fresh water B. Punch tubes every week C. Clean condenser pump strainers D. None of the above

A. Drain the tower every one to two weeks & replace with fresh water

151. As an engineer you notice pressure drops across the evaporator. You check and notice the external equalizer line is disconnected. What will occur in the evaporator? A. Evaporator will flood B. Evaporator will starve C. Evaporator will stabilize D. Evaporator will be unaffected

A. Evaporator will flood

150. Of the following centrifugal chillers are best characterized as? A. High tonnage, low pressure machines B. Low tonnage, high pressure machine C. High tonnage, high pressure machine D. Low tonnage, low pressure machine

A. High tonnage, low pressure machines

132. Picture of a pump: A. Ninety degree reducing elbow, pump suction, pump casing, pump discharge, check valve B. Forty five degree reducing elbow, pump suction, motor housing, pump discharge, check valve C. Forty five degree straight elbow, pump suction, pump casing, pump discharge, vibration reducer D. Ninety degree reducing elbow, pump discharge, pump casing, pump suction, vibration reducer

A. Ninety degree reducing elbow, pump suction, pump casing, pump discharge, check valve

173. A condenser pump is supplied with 85 degree water from a cooling tower and returns to the tower at 88 degrees Engineer is sure the condenser tubes are clean and free of obstructions. The condenser has high condenser pressure. The reason for this could be? A. Over charge of refrigerant B. Undercharge of refrigerant C. Thermostat is damaged D. Wide open water regulating valve

A. Over charge of refrigerant

191. You are the engineer running a 2,000 ton steam driven turbine centrifugal refrigeration system supplying chilled water to a college campus with multiple buildings. You are supplying 46 degree chilled water. All the buildings are satisfied except one building. What action should the engineer do? A. Put an additional chilled water pump online. B. Lower the set point from 46 degrees to 40 degrees C. Add additional make up water to the cooling tower D. Increase the speed of the cooling tower fans

A. Put an additional chilled water pump online.

139. Centrifugal pressure is determined by? A. Speed of motor B. Variable guide vanes C. Design speed D. Electrical voltage

A. Speed of motor

194. When you are finished leak testing with R 22 and nitrogen the next step would be? A. Vent refrigerant and nitrogen to open air B. Remove refrigerant and nitrogen with recovery tank C. Add refrigerant back into system D. Add refrigerant if needed and put system back online

A. Vent refrigerant and nitrogen to open air

170. When is a chemical fire extinguisher system needed? A. Where water is not sufficient B. Pre action system C. Deluge system D. High rise office buildings

A. Where water is not sufficient

186. What does a wiring diagram display? A. Wiring of components B. Wiring of switches only C. Switch functions D. All of the above

A. Wiring of components

196. The condenser pump is on the first floor and not running. The pressure gauge shows 55 psi. There is 15 feet for each floor. What floor is the cooling tower on? A. 6 B. 8 C. 10 D. 12

B. 8

117. The cooling medium for an evaporative condenser is: A. Air B. Air and water C. Water D. Condenser fan

B. Air and water

136. Where is emergency power not required according to code? A. Egress illumination B. Data centers C. Fire Pumps D. High rise elevators

B. Data centers

174. Fireproof decorations in buildings are useful for? A. Seasonal purposes B. Don't catch fire in an emergency C. Usually energy efficient D. Help reduce heat load

B. Don't catch fire in an emergency

137. What is the most widely used regulation book by operating engineers is? A. OSHA B. EPA C. BOMA D. NFPA

B. EPA

169. Standpipe certificate should be available for? A. FDNY & OSHA B. FDNY and building inspector C. FDNY and EPA D. FDNY and NFPA

B. FDNY and building inspector

140. A single phase 208 VAC circuit has 2 hot wires the third is the? A. Spare wire B. Ground C. Control wire D. Common

B. Ground

134. A facility has failed to maintain water treatment to a refrigerant system: A. Clogging of the cooling tower B. Increase in the condenser pressure C. Corrosion of the cooling tower metals D. Cavitation of condense water pumps

B. Increase in the condenser pressure

165. If resistance is cut in half, what happens to the power factor? A. Gets cut by half B. Increases by a factor of two C. Decreases by a factor of two D. Increased by half

B. Increases by a factor of two

111. The most important requirements for a good evaporator is that: A. Air or liquid refrigerant can be used as required by the medium being cooled B. It must have enough cooling surface to absorb the required heat. C. Operates only when the heat load exceeds a minimum D. The refrigerant is contained in tubes

B. It must have enough cooling surface to absorb the required heat.

130. What is the order of components on the liquid line of a reciprocating system from the condenser to the TEV? A. Filter drier, solenoid valve, king valve, sight glass B. King valve, filter drier, solenoid valve, sight glass C. Sight glass, solenoid valve, filter drier, king valve D. Filter drier, solenoid valve, sight glass, king valve

B. King valve, filter drier, solenoid valve, sight glass

122. There is a decrease in the efficiency of a reciprocating compressor. This is mostly likely caused by: A. High suction pressure C. Low suction pressure B. Leaking suction valve D. Leaking discharge line

B. Leaking suction valve

176. Manifold hoses should be equipped with? A. Quick disconnects B. Low loss fittings C. Schrader valves D. Service apertures

B. Low loss fittings

181. Why is a pressure relief valve better that a fusible plug? A. Less costly B. Minimizes refrigerant loss C. Can be tested D. Adjustable

B. Minimizes refrigerant loss

187. Filter driers remove A. Air and acids B. Moisture and particles C. Oil and acids D. Moisture and air

B. Moisture and particles

171. What is most accurate about fire alarm books? A. Must be kept on premises within 1 year from log of last entry B. Must be kept in the fire alarm panel C. Must be kept in the building managers office D. Must be kept on the premises no less than five years

B. Must be kept in the fire alarm panel

208. You find that the check valve on a centrifugal pump is leaking. When would the most damage be caused to the pump? A. On shutdown of the pump B. On startup of the pump C. When another pump is turned on D. When servicing the pump

B. On startup of the pump

156. What is the minimum requirement an engineer needs to log readings? A. Every 2 hours B. Once per shift C. Every hour D. Every 4 hours

B. Once per shift

185. What is the function of a safety head on a compressor? A. Capacity control B. Prevents liquid slugging from damaging the valve plate C. Purge air from cylinders D. Prevent friction

B. Prevents liquid slugging from damaging the valve plate

110. Water and moisture is a serious problem in a refrigerant system, how to avoid: A. Use of fins in refrigerant line B. Proper evacuation at the charging of the system C. Proper handling of refrigerant and oil to avoid exposure to mixture D. Use of high viscosity oil in the connection

B. Proper evacuation at the charging of the system

149. What is used on an outside pipe to prevent it from freezing? A. Capacitor B. Resistor C. Heater coil D. Transformer

B. Resistor

164. What type of refrigerant is found inside the machines gauges? A. R-134A B. Same type of refrigerant inside the machine C. R-22 D. Glycol

B. Same type of refrigerant inside the machine

209. A motor winding is touching the inside of the motor housing. This could result in: A. Motor would overheat and shut down B. Shock may occur to personnel C. Motor would speed up D. Motor would slow down

B. Shock may occur to personnel

193. The charge in a TEV sensing bulb is? A. Non flammable non toxic B. Similar to refrigerant in system C. Highly toxic highly flammable D. Different type of refrigerant than in system

B. Similar to refrigerant in system

182. What is the state of refrigerant entering the compressor on a reciprocating machine? A Vapor B. Superheated vapor C. Saturated vapor D. Liquid

B. Superheated vapor

162. An engineer observes a gauge that reads saturation pressure of a refrigerant. If chilled water is circulate as the cooling medium this reading best be used to estimate the? A. Chilled water return from building spaces being pumped to the spaces being cooled B. Temperature of chilled water being pumped to the spaces being cooled C. Pressure of chilled water being pumped to spaces that are being cooled. D. Cooling tower efficiency.

B. Temperature of chilled water being pumped to the spaces being cooled

199. A standpipe system will be out of service for two days. How long should there be a fire watch? A. The first 24 hours B. The entire time the standpipe is out of service C. The first 12 hours in the morning D. The last 12 hours of the day

B. The entire time the standpipe is out of service

147. Fusible plugs on a condenser: A. Release refrigerant by pressure B. The melting point is marked on it C. Can be back seated D. Are not allowed by code

B. The melting point is marked on it

206. Which service valve should be installed to isolate a dual pressure relief valve while keeping system in service? A. Two way valve B. Three way valve C. Plug valve D. Stop valve

B. Three way valve

189. IF 29.92" HG is equal to 14.7 Psia then 26" HG converts to what in Psia? A. 13 B. 30.3 C. 12.77 D. 7.5

C. 12.77

197. There is 7.48 gallons per cubic foot. How many gallons of water are in a pipe 8 feet in diameter and 10 feet long? A. 26 B. 80 C. 3758 D. 748

C. 3758

125. A water pump is discharge against head 92 feet of water, this is approximately to a pressure of: A. 95 psi B. 20 psi C. 40 psi D. 180.psi

C. 40 psi

203. The only refrigerant/temperature chart available to a refrigerant engineer lists the temperature in degrees Celsius. If the chart indicates a Celsius temperature of 5 degrees the equivalent in Fahrenheit is? A. 18.4 degrees B. 39.2 degrees C. 41 degrees D. 27 degrees

C. 41 degrees

168. What is a compressor safety head? A. A pressure relief on the low side B. Cylinder head with a pressure relief on the high side C. A spring on the valve plate D. Rupture disc

C. A spring on the valve plate

154. FDNY is most concerned with which ASHRAE refrigerant classification? A. A1 B. B2 C. A3 D.B1

C. A3

167. A chilled water system has an air cooled condensing unit on a roof during cold weather has what type of protection? A. Glycol running through it B. Heater coil C. Air limiting device D. Resistor

C. Air limiting device

161. Which of the following does not require flame resistant treatment? A. Decorations in a hotel lobby B. Decorations in a building lobby C. Art work in a museum D. A heavy curtain in a theater

C. Art work in a museum

163. Regardless of the ASHRAE refrigerant classification in use, in the event of a refrigerant escape the engineer should be aware of? A. Refrigerant fire B. Refrigerant toxicity C. Asphyxiation D. Refrigeration odor

C. Asphyxiation

184. What is ammonia's refrigerant ASHRAE classification? A. A1 B. B3 C. B2 D. A3

C. B2

146. What is the advantage of a shell and tube condenser, as opposed to a shell and coil condenser? A. Easier to clean B. Prevents less leaks C. Better heat transfer D. Less efficient

C. Better heat transfer

188. Show a picture of an insulated pump and ask what is this pump? A. Centrifugal pump B. Reciprocating pump C. Centrifugal chill water pump D. Condenser pump

C. Centrifugal chill water pump

145. What is not required to be serviced annually? A. Fire extinguishers B. Fire pump motors C. Compressors D. Diesel engine systems

C. Compressors

202. If a sprinkler system is offline for two days how often do you need to inspect it until it is returned back to service? A. Only in the morning not at night until restored B. Only in the evening not the morning until restored C. Continuously 24 hours a day until system is restored D. 12 hours a day until system is restored

C. Continuously 24 hours a day until system is restored

157. You are the only engineer on duty with a machine running. A vice president tells you to shovel snow. What should you do? A. Call your union rep B. Shovel snow C. Do not leave building D. Shovel but check the machine regularly

C. Do not leave building

205. In a building with a multizone standpipe system, how does each zone get supplied with water? A. Each zone will be connected to the main water supply B. It will supply only the highest standpipe zone C. Each zone will have its own automatic water supply D. It will supply only the lowest standpipe zone

C. Each zone will have its own automatic water supply

116. The following is a desirable property in a refrigeration A. High corresponding operation pressure B. High viscosity C. High latent heat D. High corresponding compressor discharge temperature

C. High latent heat

172. What is the volume of a box 12"X12"X12" measure? A. 1728 inches B. 1728 square inches C. I cubic foot D. 144 cubic feet

C. I cubic foot

159. What is the responsibility of a B29 COF holder? A. Maintain the battery system B. Test the battery system C C. Inspect the battery system D. Repair minor problems

C. Inspect the battery system

141. Liquid refrigerant that has passed through a metering device is a? A. High pressure liquid B. Sub cooled liquid C. Low pressure saturated liquid D. Low pressure vapor

C. Low pressure saturated liquid

177. Water regulating valves are used to? A. Vary flow based on water temperature B. Maintain refrigerant temperature C. Maintain condenser pressure to a pre-determined level D. Maintain low side pressure to proper level

C. Maintain condenser pressure to a pre-determined level

133. Picture of a compressor: A. Oil drain connection, allows for the removal of oil from the compressor only B. Refrigerant charging port, allows for the addition and remove of refrigerant from the compressor C. Oil charging port allows for the addition and removal of oil from the compressor D. Oil charging port, allows for the addition of oil from the compressor, only

C. Oil charging port allows for the addition and removal of oil from the compressor

138. What type of refrigerant do you need FDNY approval for? A. Ammonia B. R-22 C. Propane D. R-134A

C. Propane

179. You are performing hot works near a sprinkler head. What can you do to prevent the fire alarm from going off? A. Take the building offline B. Drain the sprinkler system in that area C. Put a non-combustible barrier to protect the sprinkler head D. Perform hot works in service area

C. Put a non-combustible barrier to protect the sprinkler head

143. After recovering liquid refrigerant from a centrifugal chiller the next step is to? A. Blow the system out with nitrogen B. Pull a deep vacuum C. Recover vapor D. Leak test system

C. Recover vapor

115. The use of oil in the refrigeration machine is to: A. Mix the oil with liquid refrigerant B. Add non condensables to refrigerant C. Reduce wear and friction in the compressor parts D. None of the above

C. Reduce wear and friction in the compressor parts

195. What is the device used to measure the speed of a turbine? A. Governor B. Gimpel valve C. Tachometer D. First stage nozzle gauge

C. Tachometer

152. When entering Phase II fireman's service, what statement is correct? A. Does not need a special key B. Can only be used by a firefighter C. The elevator operator is the only person that could control the elevator D. Must be tested semi-annually

C. The elevator operator is the only person that could control the elevator

129. In the picture the valve is in what position: VALVE HANDLE AT A 450 a. The valve is closed b. The valve position cannot be determined C. The valve is cracked open d. The valve is fully opened

C. The valve is cracked open

127. The most important reason for installing a muffler in reciprocating refrigerant machine is: A. Prevent compressor damage B. Prevent condenser damage C. To contain the compressor pulsation noise D. To reduce velocity of the refrigerant

C. To contain the compressor pulsation noise

153. A FDNY permit is required to conduct hot works for? A. Brazing B. Welding C. Use of oxygen and flammable gas D. All of the above

C. Use of oxygen and flammable gas

126. Which one of the following will connect to the middle port on a gauge manifold? A. Solenoid valve B. King valve C. Vacuum pump D. Suction or discharge service valves

C. Vacuum pump

175. What is the lowest temperature a cooling tower can be? A. Ambient temperature B. Dry bulb temperature C. Wet bulb temperature D. Between dry bulb and wet bulb

C. Wet bulb temperature

128. Of the following, the statement that most accurately characterize a hermetic compressor is that A. Typically has a pressure lubrication system B. Will have only the motor enclosed in a gas tight housing C. Will have both the compressor and motor enclosed is gas tight housing D. Is erected in the field

C. Will have both the compressor and motor enclosed is gas tight housing

155. How long must a Fire alarm log book be kept? A. 5 years B. 1 year from last entry C. 6 months D. 3 years

D. 3 years

148. How much extra refrigerant can be stored in a machine room? A. 20% above the normal charge B. 220 lbs. C. The amount equal to the design pressure D. 330 lbs.

D. 330 lbs.

135. Which of these compressors is not a positive displacement type compressor? A. Rotary B. Screw C. Reciprocating D. Centrifugal

D. Centrifugal

123. The suction and discharge valve of the reciprocating compressor are mounted as follows: A. Suction and discharge valve on the upper side of the plate B. Suction and discharge valve below the valve plate C. Discharge valves below the valve plate and suction valve above it D. Discharge valve on top of the valve plate and suction valve below.

D. Discharge valve on top of the valve plate and suction valve below.

190. When charging refrigerant on the low side of a reciprocating machine with manifold gauges, what is the position of the manifold? A. High and low side backseated B. High and low side frontseated C. High side backseated low side frontseated D. High side frontseated low side backseated

D. High side frontseated low side backseated

160. Why is a refrigerant gauge called a compound gauge? A. You can read the pressure on the high side and the low side B. You can read temperature and pressure C. It has scales for different types of refrigerant D. It reads positive pressure and vacuum

D. It reads positive pressure and vacuum

207. When will the BTU'S exchanged be the greatest? A. High evaporator temperature, low condenser temperature B. High evaporator temperature, high condenser temperature C. Low evaporator temperature, low condenser temperature D. Low evaporator temperature, high condenser temperature

D. Low evaporator temperature, high condenser temperature

120. A refrigerant engineers was instructed to charge of 60 ton plant with R134A Refrigerant. The refrigerant engineer will most likely find the charging valve on the A. Discharge side of the compressor B. Receiver C. High side pressure side of the system D. Low pressure side of the system

D. Low pressure side of the system

158. How often must you do emergency power testing? A. Weekly B. Bi-weekly C. Annually D. Monthly

D. Monthly

124. You are the engineer running a 2000 ton (steam-driven turbine) centrifugal refrigeration system, a refrigeration system supplies chilled water to a college campus with multiple buildings. While making your rounds you notice that the discharge pressure of your condenser water pumps is significantly lower than the normal. Which following action would you avoid taking: A. Put on a addition condenser water pump B. Flush out the bucket strainer of the condenser water pump. C. Send you assistant to check for cooling tower level D. Put on an additional surface condenser pump and lower the chilled water set point.

D. Put on an additional surface condenser pump and lower the chilled water set point.

204. In the picture below what does the equipment detect? A. Carbon Dioxide B. Oxygen C. Halogen D. Refrigerant leaks

D. Refrigerant leaks

118. The ratio of the actual pressure of water vapor in the atmosphere to the saturated pressure of give temperature is: A. Partial pressure B. Humidly affect C. Absolute humidity D. Relative humidity

D. Relative humidity

201. How do you start a centrifugal chiller? A. Start the chilled water pump, start condenser water pump, start compressor, check oil, start cooling tower B. Start the chilled water pump, start condenser water pump, check oil, start compressor, start cooling tower C. Start cooling tower, check oil, start compressor, start the chilled water pump, start condenser water pump, D. Start the chilled water pump, start condenser water pump, check oil, start cooling tower, start compressor

D. Start the chilled water pump, start condenser water pump, check oil, start cooling tower, start compressor

114. To convert water at 32F to ice at the same temperature a refrigeration system must remove: A. Latent heat of vaporization B. The heat of crystallization C. Sensibility heat D. The latent heat of fusion

D. The latent heat of fusion

113. While doing a routine line inspection, the engineer notices the bulb of the TXV on the floor. The refrigerant engineer should attach bulb at the: A. Three quarters way towards the end of the coil. B. The inlet end of the coil C. The expansion valve outlet D. The outlet end of the coil

D. The outlet end of the coil

112. While on duty a refrigeration engineer notices that the suction line to the compressor and part of the compressor itself is frosted of the following, the most likely reason for this condition would be: A. Low condenser water temperature B. The TEV is almost closed C. There is a blockage in the liquid line D. There is not enough refrigerant in the system

D. There is not enough refrigerant in the system

142. With a 75degree dry bulb and a 73degree wet bulb the relative humidity is? A. Normal B. Very low C. 100% relative humidity D. Very high

D. Very high

121. A refrigerant engineer verifies that a chilled water pump is cavitating. Of the following the most likely cause for this condition is: A. A faulty cooling tower water level controller B. Operating at sustaining high loads C. Too long a period between pump servicing D. Water leaks through the mechanical seals

D. Water leaks through the mechanical seals

119. The only refrigerant /temperature chart available to a refrigerant engineer list the temperature is degrees Celsius if the chart indicates a Celsius temperature of 4 degrees to equivalent to F: a. 35.2 degrees C. 27.0 degrees b. 39.2 degrees d. 18.4 degrees

b. 39.2 degrees