Mock Exam Review: Applied Power Engineering and Building Systems

Comprehensive practice flashcards covering mechanical engineering concepts, boiler operations, HVAC systems, and industrial plant maintenance based on mock exam transcripts.

What can occur if installation forces are applied through the balls of a bearing?

Brinelling

What additive is required for oil to flow at very low temperatures?

Pour point depressant

What is the maximum proximity to the ends for a groove cut in the top half of a shell bearing lining?

$$1.25\,cm$$

Which factor has the greatest effect on the viscosity of lubrication oil?

Temperature

Upon what does an oil's ability to lift and support heavy loads depend?

Hydraulic pressure

What is the result of using pressurized air to blow out a cleaned bearing?

It will cause the bearing to become pitted

What point is reached when oil gives off enough vapour to ignite and burn continuously?

Fire point

Which instrument is used to measure oil viscosity at a specific temperature as it flows through a small diameter tube?

A Saybolt viscometer

What is the head of a pumping system excluding fluid velocity, pipe friction, and fittings?

Static head

What kind of head represents the distance between the pump center line and the surface of the liquid in an elevated supply tank?

Static suction

What is a primary disadvantage of large duct sizes in massive buildings?

Excessive space is required to move large amounts of air

How often are oil samples from lubricating and seal oil reservoirs analyzed?

Monthly

A double-acting pump is classified as what type of pump?

A positive displacement pump

What component of a centrifugal pump consists of an impeller surrounded by a casing?

An impeller surrounded by a casing

On what principle does a reciprocating air compressor operate?

Volume reduction

What fitting is installed between a steam boiler pressure gauge and the boiler to prevent gauge damage?

Syphon

By what mechanism do safety valves pop open?

Steam pressure acts upon a larger area as soon as the valve opens

If a boiler with a single safety valve has an MAWP of $1000\,kPa$, what is the maximum permissible pressure when the safety valve is blowing?

$$1060\,kPa$$

Who is authorized to adjust the set pressure of a safety valve?

The safety valve manufacturer, its authorized representative, or an assembler

Within what time frame must primary controls in a burner management system shut off fuel upon flame failure?

Four seconds

Why should a vent valve on a steam drum be opened when cooling down a steam boiler?

To prevent a vacuum from forming in the boiler

What pressure range do deaerators typically operate within?

$$70\,kPa\,to\,400\,kPa$$

Natural ropes are primarily made of what material?

Manila

What is the most common acid used for boiler cleaning?

Hydrochloric

A screwdriver with a square tip is known as what?

A Robertson

Prior to entering a steam drum, which valves must be closed, locked, and tagged?

Main steam, blowdown, and feedwater valves

What is the normal annual loss of zeolite in a sodium zeolite softener?

$$3\%$$

What is the purpose of sludge conditioning in a boiler?

Prevents precipitates from adhering to boiler surfaces

What process is used to remove sulfur from a gas stream in a natural gas plant?

Claus

What is the vertical distance from the liquid surface of the supply tank to the liquid surface in the discharge tank called?

Total static head

What defines the "popping action" of a safety valve?

A lip on the valve disc

Which material is used as a solid lubricant?

Molybdenum disulfide

What is the approximate efficiency of a radiant hot oil heater?

$$40\,to\,50\%$$

In an absorption refrigeration system, what chemical is added to help the lithium bromide solution absorb water vapour?

Octyl alcohol

What is the formula used to calculate heat gain or loss by air infiltration?

$$H = C \times Q(t_1 - t_0) \times L$$

What characterizes an impulse turbine?

High velocity steam exerts force upon rotating blades due to change in momentum

What are the two most common in-situ methods for oil recovery from bituminous sands?

Steam assisted gravity drainage (SAGD) and cyclic steam stimulation (CSS)

Which process is used to remove lignin from chipped wood in a chemical pulp mill?

The digester

A pressure-relief device should be set to no more than what percentage of the system's high-side design pressure?

$$90\%$$

What size range are pollens usually found in?

$$5\,microns\,to\,150\,microns$$