Power Engineering Class 4 Part B Exam – Test Bank with Correct Answers for Canadian Certification

Power engineering Class 4 Part B Exam with correct answers



e - CORRECT ANSWER✔✔Impulse turbines:

Choose one answer.

a. are only used with low pressure steam

b. require large thrust bearings

c. were invented by Parsons

d. have large pressure drops across the huckets

e. have blades with the same steam inlet and outlet angles



d - CORRECT ANSWER✔✔The stationary passages of a reaction turbine are called the:

Choose one answer.

a. Shaft

b. Rotor

c. Shroud ring

d. Fixed blades

e. Diaphragms



c - CORRECT ANSWER✔✔The great majority of steam turbine governing systems utilize the

a) hydraulic system principle

b) pneumatic system principle

c) mechanical centrifugal principle

d) lever principle

e) bimetal expansion principle



e - CORRECT ANSWER✔✔Biological fouling in recirculating cooling water towers is caused by algae,
_____ and bacteria growth.

Choose one answer.

,a. Flora

b. Fauna

c. Micro-organisms

d. Biological

e. Fungi



c - CORRECT ANSWER✔✔With all other factors being equal, a counter-flow cooling tower
_____________ as a cross-flow cooling tower.

Choose one answer.

a. Is not as tall

b. Has much less cooling capacity

c. Requires less floor space

d. Requires less fan power

e. Has a lower pressure drop



e - CORRECT ANSWER✔✔A simple gas turbine is one without reheaters or:

Choose one answer.

a. Starting motors

b. Shafts

c. Compressors

d. Combustors

e. Regenerators



a - CORRECT ANSWER✔✔Large internal combustion engines are cooled with:

Choose one answer.

a. Water jackets

b. Evaporation

c. Air cooling

d. Condensers

,e. Refrigeration



a - CORRECT ANSWER✔✔Using a compressed air starting motor is a popular method of starting:

Choose one answer.

a. A large stationary diesel engine

b. A small two-stroke engine

c. A gasoline engine

d. An aircraft engine

e. A propane engine



b - CORRECT ANSWER✔✔When a reciprocating pump delivers fluid every second stroke of its piston, it
is called a ___________ pump:

Choose one answer.

a. Positive displacement

b. Single acting

c. Two-stage

d. Double acting

e. Duplex



c - CORRECT ANSWER✔✔Rotary pumps:



1. are high pressure pumps

2. must be primed

3. use mechanical seals

4. are positive displacement pumps



a) 1, 2

b) 2, 3

c) 1, 4

, d) 1, 3, 4

e) 1, 2, 3, 4



a - CORRECT ANSWER✔✔Intercoolers:

Choose one answer.

a. Must have a drain

b. Are more efficient when cooled with air than with water

c. Are used on double acting single stage compressors

d. Help increase the volume of the air

e. Should use an antifreeze solution



e - CORRECT ANSWER✔✔Grease:

Choose one answer.

a. Is a semi-liquid

b. Is an excellent high-speed, low load lubricant

c. Attracts dirt and water to bearings, leading to premature failure

d. Is likely to drip or splash from bearings and therefore is rarely used in the textile and food industries

e. Can be used under conditions where oil may leak away and leave the bearing dry



a - CORRECT ANSWER✔✔The property of oil that indicates its ability to support a load is:

Choose one answer.

a. Viscosity

b. Viscosity index

c. Pour point

d. Floc point

e. Consistency



d - CORRECT ANSWER✔✔Which of the following has the greatest effect on the viscosity of lubrication
oil?