BCIT 5th class boiler engineer quiz 8

Question 1

The valves on a reciprocating compressor are opened by

a) hydraulic actuators.

b) a pressure difference.

c) a timing gear.

d) the cam shaft.

e) the eccentric.

Answer 1

b) a pressure difference.

B02 CH27 Q032


Only spring and air pressure can move the disc and stem of the reciprocating compressor valve.


Question 2

The output of a constant speed compressor is controlled by

a) governors.

b) a stop-start switch.

c) overload valves.

d) the hand speed changer.

e) unloaders.

Answer 2

e) unloaders.

B02 CH27 Q024

In the constant speed method of control, the compressor drive (usually an electric motor) runs at a constant speed at all times, but the output from the compressor is varied according to the air demand by a pilot type unloader.

Question 3

The device used for removing the heat of compression of the air between consecutive stages of a multi-stage compressor is called

a) an intercooler.

b) a condenser.

c) an unloader.

d) an aftercooler.

e) an evaporator.

Answer 3

a) an intercooler.

B02 CH27 Q016


Figure (a) shows a two-stage, two cylinder air compressor. Atmospheric air is drawn through a filter into the first stage to be compressed to its initial pressure. It is then discharged into the inlet of the second stage, where it is compressed to its final pressure and discharged into a storage tank. A finned intercooler is installed between the two stages to reduce the air temperature.

Question 4

The most suitable method of control for an air compressor that operates at 25% of the time is

a) constant speed control.

b) start and stop control.

c) free air unloader control.

d) suction unloader control.

e) variable speed control.

Answer 4

b) start and stop control.

B02 CH27 Q022

The start and stop method is only used on electric motor driven units. A sufficiently large receiver should be installed so that the compressor does not continuously start and stop and operates less than 50% of the time. The compressor should be automatically unloaded during the start-up period to protect the motor from overloading.

Question 5

Where pistons move in a cylinder, it is necessary for the lubricant to provide

a) sealing.

b) vapour venting.

c) alignment.

d) shock reduction.

e) tension.

Answer 5

a) sealing.

B02 CH27 Q030

Lubricating oil is necessary in an air compressor to perform the following functions:
* To prevent wear by providing a film between surfaces.
* To reduce friction and resulting power loss by providing a film between surfaces.
* To remove heat produced by friction.
* To reduce corrosion by providing a coating for metal surfaces.
* To provide sealing around piston rings, vanes, valves, etc.

Question 6

Rotary pumps should be started with the discharge valve open, because they are ___________ pumps.

a) dynamic

b) positive displacement

c) reciprocating

d) regenerative

e) double-acting

Answer 6

b) positive displacement

B02 CH28 Q016

Rotary pumps deliver high pressure liquid without the pulsations that occur in reciprocating pumps. Where positive displacement pumps are installed, a means of pressure relief should be installed in the discharge line before the discharge valve. If the discharge valve is inadvertently closed, excessively high pressures could be produced, which could cause damage to the pump or piping.

Question 7

Match the label of each centrifugal pump component with its proper name.

____ impeller

____ impeller vanes

____ volute casing

____ discharge flange

____ impeller suction

1. A
2. B
3. C
4. D
5. E

Answer 7

__5__ impeller
__3__ impeller vanes
__4__ volute casing
__2__ discharge flange
__1__ impeller suction

B02 CH28 Q020

Question 8

Volute pump casings have a characteristic

a) increasing cross-sectional area in direction of flow.

b) uniform cross-sectional area in direction of flow.

c) increasing wall thickness because of pressure rise.

d) decreasing cross-sectional area in direction of flow.

e) high operating temperature due to fluid friction.

Answer 8

a) increasing cross-sectional area in direction of flow.

B02 CH28 Q010


The volute casing has an increasing cross-sectional area as it approaches the pump discharge. In this area, the velocity of the liquid discharged from the impeller is lowered and converted to pressure. To make the conversion from velocity to pressure more effective, stationary diffuser vanes can be installed around the rim of the impeller.

Question 9

The vertical distance between a pump’s centre line to the free surface of water in the well below the pump is the

a) pressure lift.

b) total static head.

c) static suction head.

d) dynamic suction head.

e) static suction lift.

Answer 9

e) static suction lift.

B02 CH28 Q008

The distance, measured vertically, that the intake of the pump is placed above the surface of the water is called the static suction lift.

Question 10

Calculate the size of packing to be used to repack a pump gland having an 8.6 cm stuffing box bore and 6.7 cm pump shaft diameter.

a) 0.50 cm.

b) 0.95 cm.

c) 1.6 cm.

d) 1.9 cm.

e) 3.8 cm.

Answer 10

b) 0.95 cm.

B02 CH29 Q008

To determine the correct size (thickness) of packing to use, measure the bore of the stuffing box and subtract the diameter of the pump shaft and divide the difference by two. In this case:

8.6 cm - 6.7 cm = 1.9 cm, and, 1.9 cm / 2 = 0.95 cm (Ans.)

Question 11

Proper priming and venting of a pump is important, especially if

a) a mechanical seal is used.

b) the medium being pumped is high temperature.

c) the medium being pumped contains suspended solids.

d) the pump has a stuffing box and lantern ring.

e) oil or other low flash point lubricant is being pumped.

Answer 11

a) a mechanical seal is used.

B02 CH29 Q018

Before starting a centrifugal pump, it must be primed, otherwise the impeller will simply churn air and will not produce any suction. In addition, the wearing rings will have no liquid to lubricate them and they may seize. Also, as mentioned previously, mechanical seals and packing will be damaged by dry running.

Question 12

A leaking mechanical pump seal may be caused by

a) excessive fluid flow through the pump.

b) excessively high discharge pressure.

c) an abnormally high bearing temperature.

d) misalignment of suction piping.

e) operating with a positive suction pressure.

Answer 12

d) misalignment of suction piping.

B02 CH29 Q014

A leaking seal may be caused by the following:
1. Seal faces scored or grooved.
2. Seal housing bolts too tight, causing distortion of rings.
3. “O” ring gaskets cut or nicked during installation.
4. Misalignment of piping, causing distortion of pump parts.
5. Excessive pump shaft vibration.

Question 13

To prevent mechanical seal faces from becoming scored or grooved, make certain that

a) the pump is not operated at excessive discharge pressures

b) the pump is always started with the suction valve closed.

c) the pump is equipped with a foot valve.

d) the bearing oil sump is at least 50% full of lubricant.

e) the coolant flow to the seal is adequate.

Answer 13

e) the coolant flow to the seal is adequate.

B02 CH29 Q012

It is extremely important that the seals never run in a dry condition, otherwise the faces will become grooved and scored.

Question 14

If the viscosity of an oil changes little with large temperature change, then the oil is said to have a

a) high pour point.

b) high carbon residue.

c) low pour point.

d) low viscosity index.

e) high viscosity index.

Answer 14

e) high viscosity index.

B02 CH30 Q016

This viscosity index is a measurement of how much the viscosity of a certain oil changes with temperature change. If an oil has a high viscosity index (V.I.) this indicates that its viscosity changes little with temperature change.

Question 15

Oil additives

a) will always affect the pour point greatly.

b) should not significantly affect all other characteristics.

c) are not a component of most lube oils.

d) never lose their effect during use of the oil.

e) should be used as little as possible.

Answer 15

b) should not significantly affect all other characteristics.

B02 CH30 Q014

Frequently it is possible to improve the desirable characteristics of a lubricating oil by the use of additives. These are materials which are added to the oil and which are able to improve certain characteristics of the oil without adversely affecting any other characteristics.

Question 16

The property of an oil which indicates its ability to support a load is

a) load factor.

b) pourpoint.

c) floc point.

d) viscosity.

e) viscosity index.

Answer 16

d) viscosity.

B02 CH30 Q008

Viscosity is a measure of the resistance of a liquid to internal deformation or shear. It indicates the liquid’s ability to flow and, in the case of a lubricating oil, the viscosity determines the ability of the oil to support a load, the power required to overcome internal friction, and the amount of heat that will be produced due to internal friction.

Question 17

A type of anti-friction bearing is the __________ bearing.

a) elliptical

b) ball

c) sleeve

d) journal

e) spiral

Answer 17

b) ball

B02 CH31 Q010


In the lubrication of ball and roller bearings, see figure, the principle is somewhat different. In this type of bearing, which is also referred to as an antifriction bearing, the sliding of one surface over the other is largely replaced by a rolling motion, therefore friction is largely eliminated (hence the name antifriction).


Question 18

A thrust bearing

a) prevents radial movement of the shaft.

b) prevents oil whip from occurring.

c) prevents axial movement of the shaft.

d) prevents shaft vibration.

e) must be installed on both ends of the shaft.

Answer 18

c) prevents axial movement of the shaft.

B02 CH31 Q006

The purpose of a thrust bearing is to prevent a rotating shaft from moving in an axial direction. A simple type of thrust bearing, known as a collar thrust, is shown.

Question 19

The type of bearing most commonly used in microturbines is the

a) roller bearing.

b) foil bearing.

c) needle bearing

d) ball bearing.

e) journal bearing.

Answer 19

b) foil bearing.

B02 CH32 Q005

The foil bearings used in a microturbine are a type of air bearing. The turbine shaft is supported by a compliant spring loaded journal lining. As the shaft’s rotational speed increases, the working fluid (air) pushes the foil away from the shaft, preventing metal-to-metal contact.

Foil bearings require no external pressurization system for the working fluid, therefore, the hydrodynamic bearing is self-starting. Anti-wear coating on the bearings allow over 100,000 start/stop cycles.

The main advantage of foil bearings is the elimination of the oil systems required by traditional bearing designs.

Question 20

After starting, a diesel generator should be loaded up

a) before the power goes out.

b) once the engine is up to operating temperature.

c) before the batteries have been discharged.

d) immediately.

e) as soon as it is synchronized.

Answer 20

b) once the engine is up to operating temperature.

B02 CH33 Q004

If possible the engine should be run with little or no load until normal operating temperature has been reached. When the engine operating temperature has been reached, the load can be applied slowly.

Question 21

The procedure for the determination of the heating surface of a boiler for registration in the province of BC is found in

a) the ASHRAE standards.

b) the Power Engineers, Boiler, Pressure Vessel and Refrigeration Safety Regulation.

c) the National Board Inspection Code.

d) ASME/ANSI Section I.

e) ASME Section VIII, Division 1.

Answer 21

b) the Power Engineers, Boiler, Pressure Vessel and Refrigeration Safety Regulation.

B03 CH01 Q014

The heat receiving surface area is determined in accordance with Section 46 of the BC Regulations.

Question 22

According to the Regulations, a power engineer who is designated by the owner to be responsible for the operation and maintenance of a plant is the

a) supervisory engineer.

b) operating engineer.

c) chief engineer.

d) shift engineer.

e) assistant engineer.

Answer 22

c) chief engineer.

B03 CH01 Q006

According to the BC Regulation, “chief engineer” means a power engineer who is designated by the owner to be responsible for the operation and maintenance of a plant and who is responsible for ensuring that all regulated work in the plant is performed by appropriately qualified persons.

Question 23

The primary purpose of boiler and pressure vessel legislation is to

a) specify boiler design parameters.

b) reduce plant operating costs.

c) safeguard life and property.

d) license power engineers.

e) generate revenues for the government.

Answer 23

c) safeguard life and property.

B03 CH01 Q016

The intent of the Boiler and Pressure Vessel Act is the preservation of life and property.

Question 24

According to the Act and Regulations, the code that is applicable to refrigeration systems in Canada and in BC is

a) CSA B52

b) CSA B96

c) ASME B31.1

d) CSA B51

e) NRC

Answer 24

a) CSA B52

B03 CH02 Q002

BC Regulations - SCHEDULE 5 - Adopted Codes and Standards - CSA B52 is the Mechanical Refrigeration Code of the Canadian Standards Association.

Question 25

**The CSA B51 standard provides the rules for** a) the installation of refrigeration equipment. b) certification of power engineers. c) welding inspection. d) installation of sanitary drain systems. e) the construction and inspection of boilers and pressure vessels.

Answer 25

**e) the construction and inspection of boilers and pressure vessels.** B03 CH02 Q004 CSA B51, Boiler, Pressure Vessel and Pressure Piping Code deals with the design, construction, installation, operation, testing and repair of boilers, pressure vessels and related equipment.

Question 26

**Air compressor intercoolers should be equipped with** a) safety valves. b) automatic blowdowns. c) moisture separators. d) vents. e) baffles.

Answer 26

**a) safety valves.** B02 CH27 Q028 *Intercoolers should be provided with a safety valve,* pressure gauge and thermometer on the compressed air side, and also a thermometer on the cooling water side.

Question 27

**An air receiver used in an air compression system will perform the following functions:** 1. Acts as a storage vessel. 2. Eliminates pulsations in discharge lines. 3. Separates out water from the air. 4. Controls the temperature of the air before it enters the system. a) 1, 2 and 3 only. b) 1, 2, 3 and 4. c) 1 and 2 only. d) 1, 2 and 4 only. e) 2 and 3 only.

Answer 27

**b) 1, 2, 3 and 4.** B02 CH27 Q018 An air receiver is a pressure vessel which is used as an air reservoir in a compressed air system. In addition to acting as a reservoir, it acts to dampen pulsations in the discharge pressure of a reciprocating compressor. Another function of the receiver is to allow moisture and oil particles to settle out from the air. These particles collect at the bottom of the receiver and are drained periodically.

Question 28

**Dynamic compressors increase air pressure by** a) trapping the air in pockets and reducing its volume. b) accelerating the air. c) increasing the volume. d) increasing the temperature. e) using rotary screws.

Answer 28

**b) accelerating the air.** B02 CH27 Q012 The term "dynamic" is used to describe those compressors which use blades or vanes to give velocity and then pressure to the air.

Question 29

**A chemical typically utilized in compressed air dryers is** a) hydrated lime. b) caustic soda. c) silica-gel. d) sodium bicarbonate. e) sodium sulphite.

Answer 29

**c) silica-gel.** B02 CH27 Q026 Sorbents are divided into two classes adsorbents and absorbents. Adsorbents, *such as silica-gel,* activated alumina and bauxite, are solid substances which attract water vapour from the air. This vapour condenses on the surface of the adsorbent and remains there as a thin water film.

Question 30

**An air compressor may be automatically started and stopped by a pressure switch, which is usually found connected to the** a) receiver. b) intercooler. c) aftercooler. d) separator. e) suction pipe.

Answer 30

**a) receiver.** B02 CH27 Q020 In the start and stop control method, the compressor is shut down when little or no air is required by the system and started when the demand increases. *This starting and stopping can be done by means of a pressure switch which senses the pressure in the receiver.* For example, in order to supply a system with air at 700 kPa (100 psi), the control could be arranged to start the compressor when the pressure drops to about 650 kPa (90 psi) and to stop the compressor when the pressure rises to 750 kPa (110 psi).

Question 31

**Three examples of rotary pump designs are** a) plunger, diaphragm and power driven. b) two screw, duplex and simplex. c) sliding vane, lobe and spur gear. d) axial flow, mixed flow and regenerative. e) simplex, internal gear and regenerative.

Answer 31

**c) sliding vane, lobe and spur gear.** B02 CH28 Q014 Some common rotary pumps are *gear pumps, lobe pumps, and sliding vane pumps.*

Question 32

**The pump shown is a/an** a) regenerative pump. b) rotary pump. c) diffuser pump. d) positive displacement pump. e) diaphragm pump.

Answer 32

**c) diffuser pump.** B02 CH28 Q018 To make the conversion from velocity to pressure more effective, *stationary diffuser vanes can be installed around the rim of the impeller.* This construction gives rise to the term diffuser centrifugal pump as shown.

Question 33

**The vertical distance between a pump's centre line to the free surface of water in the discharge tank is the** a) static friction head. b) total head. c) static discharge head. d) total static head. e) pressure head.

Answer 33

**c) static discharge head.** B02 CH28 Q006 The distance from the free surface of the supply tank to the centre line of the pump is called the static suction head and the total static head is then the difference between static discharge head and static suction head.

Question 34

**The purpose of a diffuser in a centrifugal pump is to** a) change the velocity of the liquid to pressure. b) ensure the pump maintains its prime. c) counter balance the axial thrust of the impeller. d) change the pressure of the liquid to velocity. e) reduce the pressure at the packing gland.

Answer 34

**a) change the velocity of the liquid to pressure.** B02 CH28 Q012 To make the conversion from velocity to pressure more effective, stationary diffuser vanes can be installed around the rim of the impeller. This construction gives rise to the term diffuser centrifugal pump as shown in the figure.

Question 35

**A centrifugal pump** a) can lift water from very deep wells b) must be equipped with a foot valve when drawing suction from a deaerator. c) is mainly used with engine lubrication systems. d) needs a lantern ring when the suction pressure is below atmospheric. e) will work well with a high negative suction head.

Answer 35

**d) needs a lantern ring when the suction pressure is below atmospheric.** B02 CH29 Q006 Often the pressure inside the pump at the stuffing box is below atmospheric pressure and instead of water leaking out through the packing, the tendency is for air to leak in. *When this is the case the stuffing box is provided with a sealing water connection and a lantern ring as shown.* Leakage of air would destroy the vacuum and result in a conditions called "air binding" or "vapor locking."

Question 36

**The illustration shows a/an** a) stationary mechanical seal. b) rotating mechanical seal. c) labyrinth fitting. d) wearing ring. e) carbon seal.

Answer 36

**b) rotating mechanical seal.** B02 CH29 Q022 In the rotating seal sketched, the sealing ring and spring are held in place by a shell which is fastened to the pump shaft with a set screw. Therefore the sealing ring will turn with the shaft. The mating ring, however, is held stationary within the pump casing.

Question 37

**Shown in the illustration of a centrifugal pump is the** a) casing wearing ring. b) lantern ring. c) impeller wearing ring. d) packing rings. e) labyrinth fitting.

Answer 37

**c) impeller wearing ring.** B02 CH29 Q020 Fig. 1(b) shows a single flat wearing ring threaded on the eye of the impeller.

Question 38

**A mechanical pump seal** a) will have a substantial amount of leakage. b) requires less downtime to repair than packing seals. c) does not need cooling. d) will have more wear on the shaft than a packing gland. e) is used for high temperature and pressure service.

Answer 38

**e) is used for high temperature and pressure service.** B02 CH29 Q010 Mechanical seals have the following advantages over packing. 1. They require much less maintenance. 2. They do not produce wear of shafts or shaft sleeves as do packing rings. 3. They reduce leakage to a minimum. 4. *They can be designed to work under very high temperatures and pressures.*

Question 39

**The majority of liquid lubricants are** a) vegetable oils. b) synthetic oils. c) animal fats. d) mineral oils. e) greases.

Answer 39

**d) mineral oils.** B02 CH30 Q006 *Mineral oils are produced from crude petroleum and are the most commonly used class.* The crude petroleum, from which gasoline, kerosene, and light fuel oil have already been extracted, is processed in a fractionating tower and the various grades of lubricating oil are drawn off at different levels from the tower. The heavy oils are drawn off near the bottom of the tower while the lighter grades of oil are removed from the higher levels of the tower.

Question 40

**The temperature at which enough vapour is given off to burn oil continuously is called the** a) dew point. b) flash point. c) pour point. d) fire point. e) viscosity index.

Answer 40

**d) fire point.** B02 CH30 Q010 The flash point of an oil is the temperature at which the oil will give off sufficient vapour to ignite momentarily when mixed with air and exposed to a source of ignition. *The fire point of an oil is the temperature at which enough vapour is given off to burn continuously.*

Question 41

**High capacity steam turbines should be lubricated with oils that** a) have a low pour point. b) mix well with water. c) have a very high viscosity. d) are fire resistant. e) have a low specific heat.

Answer 41

**d) are fire resistant.** B02 CH30 Q012 The oil used in a turbine circulating system functions as both a lubricant and a cooling medium for the bearings. In addition, in many cases, the oil also serves as a sealing medium. Such an oil should be readily separated from water which may contaminate it, and should incorporate corrosion inhibitors and antifoam and anti-oxidant additives. *Consideration has been given in recent years to the use of synthetic fire resistant turbine oils.* These will no doubt gain in popularity due to the fact that turbine lubricating oil lines are usually in close proximity to high temperature steam lines, thus presenting a fire hazard should an oil leak develop.

Question 42

**A thrust bearing that utilizes the oil wedge principle of lubrication is the** a) flotation thrust bearing. b) collar thrust bearing. c) vertical thrust bearing. d) Bernoulli thrust bearing. e) Kingsbury thrust bearing.

Answer 42

**e) Kingsbury thrust bearing.** B02 CH31 Q008 A more suitable design of thrust bearing has the bearing surfaces in the form of pads. These pads are free to tilt and thus allow the formation of an oil wedge to separate the bearing pad from the shaft collar. There are two major types of tilting pad thrust bearings, the Michell and the *Kingsbury.*

Question 43

**A form of lubrication which requires continual motion of a shaft or surface is** a) rolling lubrication. b) boundary lubrication. c) forced lubrication. d) fluid film lubrication. e) microscopic film lubrication.

Answer 43

**d) fluid film lubrication.** B02 CH31 Q004 Fluid film lubrication, also called flood lubrication, occurs when the lubricating film between surfaces is thick enough to completely separate the surfaces. This condition will exist only if the bearing clearance space is flooded with oil *and if the moving surface in the bearing is in continual motion.*

Question 44

**The figure bellow represents a** a) roller bearing. b) ball bearing. c) journal bearing. d) foil bearing e) thrust bearing.

Answer 44

**d) foil bearing** B02 CH32 Q006 The foil bearings used in a microturbine are a type of air bearing. The turbine shaft is supported by a compliant spring loaded journal lining. As the shaft's rotational speed increases, the working fluid (air) pushes the foil away from the shaft, preventing metal-to-metal contact. Foil bearings require no external pressurization system for the working fluid, therefore, the hydrodynamic bearing is self-starting. Anti-wear coating on the bearings allow over 100,000 start/stop cycles.

Question 45

**Common operational variables to monitor during operation of a IC Gen-Set include** a) fuel pressure. b) lubricating oil level. c) oil pressure and temperature. d) load (generator output). e) all of the above.

Answer 45

**e) all of the above.** B02 CH33 Q005 Routine monitoring of a running engine involves monitoring the exterior of the engine for signs of problems such as oil leaks and smoke. It also involves monitoring the gauges on the control panel of the engine. Common operational variables to monitor include: * engine temperature * oil pressure and temperature * load (generator output) * speed (frequency) * fuel pressure * fuel level * lubricating oil level

Question 46

**Match the scope of competency with the correct type of certificate:** ____ 5th Class Class Power Engineer's Certificate ____ 4th Class Class Power Engineer's Certificate ____ 2nd Class Class Power Engineer's Certificate ____ 1st Class Power Engineer's Certificate ____ 3rd Class Class Power Engineer's Certificate 1. chief engineer of an unfired plant that has boiler capacity of 1 000 metres square or less 2. chief engineer of a low pressure hot water plant that operates at a temperature not exceeding 100 degrees Celsius and at a maximum allowable pressure of 206 kPa, and does not exceed 1000 meter square of boiler capacity 3. chief engineer of any low pressure steam plant 4. chief engineer of any plant 5. chief engineer of a high pressure power plant, that has a boiler capacity of 1 000 meter square or less

Answer 46

**__2__ 5th Class Class Power Engineer's Certificate** **__1__ 4th Class Class Power Engineer's Certificate** **__5__ 2nd Class Class Power Engineer's Certificate** **__4__ 1st Class Power Engineer's Certificate** **__3__ 3rd Class Class Power Engineer's Certificate** B03 CH01 Q018 Refer to the Regulations, Sections 14 to 24.

Question 47

**According to the Regulations, a power engineer's , boiler operator's or refrigeration operator's certificate is NOT required to operate the following plants** *(select 3 correct answers)* a) a low pressure hot water plant that operates at a temperature not exceeding 100 degrees Celsius and at a maximum allowable working pressure of 206 kPa, and does not exceed 300 meter square of boiler capacity. b) a high pressure steam boiler with heating surface of 10 square meters. c) a low pressure steam boiler with a heating surface of 150 square meters. d) a low pressure hot water plant not exceeding 150 square meters boiler capacity. e) a refrigeration plant with a total plant capacity of 300 kW prime mover nameplate rating.

Answer 47

**a) a low pressure hot water plant that operates at a temperature not exceeding 100 degrees Celsius and at a maximum allowable working pressure of 206 kPa, and does not exceed 300 meter square of boiler capacity.** **b) a high pressure steam boiler with heating surface of 10 square meters.** **d) a low pressure hot water plant not exceeding 150 square meters boiler capacity.** B03 CH01 Q020 **Exemptions from certification requirements are stated in the Regulations, Section 6.** An individual is not required to hold a certificate of qualification to operate any of the following: (a) a power plant not exceeding 10 m² of boiler capacity; (b) a low pressure steam plant not exceeding 30 m² of boiler capacity; (c) a low pressure fluid plant not exceeding 150 m² of boiler capacity; (d) a low pressure thermal fluid plant not exceeding 150 m² of boiler capacity; (e) a low temperature low pressure fluid plant not exceeding 300 m² of boiler capacity; (f) an unfired plant not exceeding 150 m² of boiler capacity; (g) a refrigeration plant with refrigerant groups Al, A2 or B1, as defined in CSA B52, not exceeding a total plant capacity of 200 kW prime mover nameplate rating; (h) a refrigeration plant with refrigerant groups A3, B2 or B3, as defined in CSA B52, not exceeding a total plant capacity of 50 kW prime mover nameplate rating; (i) an electric boiler that consumes 100 kW or less in a power plant; (j) a process (i) in a petroleum refinery other than in a power plant that is part of the petroleum refinery, and (ii) if the heat for the process is generated as a result of a reaction that is part of the process or burning; (k) a pressure vessel plant.

Question 48

**In British Columbia, the lowest grade of Power Engineer's Certificate of Competency is the** a) Boiler Engineer's Certificate. b) Interim Certificate. c) Fourth Class Power Engineer's Certificate. d) Fifth Class Power Engineer's Certificate. e) First Class Power Engineer's Certificate.

Answer 48

**d) Fifth Class Power Engineer's Certificate.** B03 CH01 Q008 BC Regulations - Division 2 - Section 7 (1) - *Fifth Class Power Engineer's Certificate is the lowest certificate,* although a Fourth Class Certificate can be achieved without first obtaining a Fifth Class qualification. In addition, there are several limited certificates but these do not qualify the holder to be a Power Engineer.

Question 49

**The CSA B51 standard provides the rules for** a) the installation of refrigeration equipment. b) installation of sanitary drain systems. c) the construction and inspection of boilers and pressure vessels. d) certification of power engineers. e) welding inspection.

Answer 49

**c) the construction and inspection of boilers and pressure vessels.** B03 CH02 Q004 CSA B51, Boiler, Pressure Vessel and Pressure Piping Code deals with the design, construction, installation, operation, testing and repair of boilers, pressure vessels and related equipment.

Question 50

**According to the Act and Regulations, the code that is applicable to refrigeration systems in Canada and in BC is** a) CSA B96 b) NRC c) ASME B31.1 d) CSA B51 e) CSA B52

Answer 50

**e) CSA B52** B03 CH02 Q002 BC Regulations - SCHEDULE 5 - Adopted Codes and Standards - CSA B52 is the Mechanical Refrigeration Code of the Canadian Standards Association.