Power Engineering Chapter 140
Showing posts with label Power Engineering Chapter 140. Show all posts
Showing posts with label Power Engineering Chapter 140. Show all posts

One of the main purposes of an external boiler inspection is to:

One of the main purposes of an external boiler inspection is to:




a. Observe operation and maintenance practice
b. Inspect all auxiliary equipment and pressure vessels
c. Verify that scale is not present on or in the tubes
d. Check for waterside corrosion
e. Ensure only licensed operators are employed at the plant






Answer: A

When shutting down a boiler for internal cleaning, you should:

When shutting down a boiler for internal cleaning, you should:




a. Shut down the boiler, then fill it completely with chemically treated water
b. Shut off the fire, drain, open up and flush
c. Allow the boiler to cool; then drain, open up and flush it
d. Shut off the fire and flush with cold water to cool it down
e. Let it stand for a couple of days then drain





Answer: C

Before a welder is allowed to weld on a boiler he must have a

Before a welder is allowed to weld on a boiler he must have a



a) certificate of qualification
b) certain minimum number of years experience
c) performance qualification card
d) welding test conducted
e) certificate of qualification and a performance qualification card







Answer: E

When working inside a steel heating boiler, which of the following safety precautions should you take?

When working inside a steel heating boiler, which of the following safety precautions should you take?


1. boiler must be cooled and vented
2. valves must be closed and locked, and all lines to and
from the boiler must be blanked
3. you may use ungrounded wiring
4. always have one man standing outside, whenever anyone is
inside the boiler




a) 1, 2, 3
b) 2, 3
c) 2, 3, 4
d) 1, 2, 3, 4
e) 1, 2, 4




Answer: E

A steam heating boiler that is to be shut down for six months during the summer, should be:

A steam heating boiler that is to be shut down for six months during the summer, should be:





a. Drained, thoroughly dried out, have desiccant placed inside and be left open
b. Drained, thoroughly dried out, have desiccant placed inside and be closed up
c. Left with the water at normal working level but opened up to atmosphere
d. Left with the water at normal working level and pressurized with air to 50 kPa
e. Filled completely with water and the vent left open to atmosphere






Answer: B

The purpose of annealing boiler tube ends is to:

The purpose of annealing boiler tube ends is to:






a. Post heat the tube ends
b. Harden the tube ends
c. Prevent the ends from burning
d. Obtain a neat appearance
e. Soften the tube ends





Answer: E

Laying up a boiler means:

Laying up a boiler means:




a. Raising the boiler
b. Preparing the boiler for a period of storage
c. Setting the boiler on its foundation
d. Taking the boiler down for an annual overhaul
e. Preparing a boiler for start up




Answer: B

The final step when replacing a firetube is:

The final step when replacing a firetube is:




a. A light re-expansion
b. Filling the boiler with water and checking for leaks
c. Applying a hydrostatic test
d. Firing the boiler up to normal working pressure
e. Annealing the tube ends






Answer: C

During a wet layup, a water tank should be installed above the boiler and attached to the vent connection in order to:

During a wet layup, a water tank should be installed above the boiler and attached to the vent connection in order to:




a. Permit the injection of chemicals
b. Prevent air from entering the boiler when the water contracts
c. Hold the manway doors closed
d. Prevent water vapour from entering the power plant
e. Prevent chemical wastage






Answer: B

The gaskets for the front and rear doors of a firetube boiler should be coated with an anti-seize compound:

The gaskets for the front and rear doors of a firetube boiler should be coated with an anti-seize compound:




a. Which will act as a sealant and prevent leakage
b. So the gasket will harden and set once temperature is raised
c. Thereby allowing the gasket to move during seating
d. To prevent the gasket from sticking to the mating surfaces
e. So that leaks will show up more readily





Answer: D

The packing gland of a boiler circulating pump should have some leakage:

The packing gland of a boiler circulating pump should have some leakage:




a. To prevent the packing from drying out
b. So that the shaft sleeve will take the wear
c. In order for the stuffing box to run at the desired high temperature
d. So the operator can tell when the pump becomes vapour bound
e. In order to keep the motor amperage down





Answer: A

A tube beading tool is used:

A tube beading tool is used:



a. On water tube boilers
b. On fire tube boilers
c. To fasten the stays in the tube sheet
d. To cut fire tubes
e. To unfasten fire tubes from the tube sheet.







Answer: B
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