Test 2 Multiple Choice

Question 1

A______boiler does not use tubes

Cast iron

Scotch marine

Watertube

Firebox

Answer 1

Cast iron

Question 2

To increase efficiency of a boiler____

More fuel is added

Firetube are increased in size

The heating surface is increased
All of the above

Answer 2

The heating surface is increase

Question 3

Soot and smoke are the result of______combustion

Complete

Incomplete

Perfect

Theoreticall

Answer 3

Incomplete

Question 4

A firetube boiler may be used______

Only in low pressure planta

Only in high pressure plant

In high or low pressure plants

Only for process steam

Answer 4

In high or low pressure plants

Question 5

As steam pressure in a boiler increases, there is a corresponding increase in the_____

Temperature

Superheat

Volume of steam

Boiler horsepowe

Answer 5

Temperature

Question 6

The comparison or ratio of heat absorbs by the water in the boiler to heat available in the fuel is defined as _______efficiency

Combustion

Watertube

Thermal

Overall plant

Answer 6

Thermal

Question 7

The steam and water drum of watertube boilers is dished to eliminate the need for______

Brickwork

Waterwalls

Stays

Baffles

Answer 7

Stays

Question 8

The area of a safety valve 4” in diameter is____square inches

2. 3562
3. 1416
4. 2843
5. 5664

.7854 x 4 x 4=

Answer 8

12.5664

Question 9

The total force on a safety valve 2.5” in diameter with a steam pressure of 15 psi is

19. 6373
20. 3838
21. 63125
22. 8373

2.5 x 2.5 x 15 psi x diameter.7854

Answer 9

73.63125

Question 10

The steam pressure gauge on the boiler is calibrated to read_____

Inches of vacuum

Pounds per square inch

Absolute pressure
Pressure below atmospheric pressure

Answer 10

Pounds per square inch

Question 11

A_______ pressure gauge can read either vacuum or pressure

Compound

Duplex

Suction

Vacuum

Answer 11

Compound

Question 12

The capacity of a safety valve is measured by the amount of steam that can be discharged-per_____

Shift

Hour

Minute

Day

Answer 12

Hour

Question 13

Spontaneous combustion can be caused by______

Fuel oil vent gas

Oily waste rags

Boiler firebox ash

Boiler ash pit dust

Answer 13

Oily waste rags

Question 14

A compound pressure gauge indicates_____

Differential pressure

Pressure or vacuum

Absolute pressure

Answer 14

Pressure or vacuum

Question 15

Steam separators work on the principle of ________

Potential energy

Kinetic energy

Trapping steam and letting water through

Changing the direction of the steam flow

Answer 15

Changing the direction of the steam flow

Question 16

Cyclone separators are used in______

Low to medium pressure boiler

Boilers equipped with superheaters

Boiler chimneys

Boiler breeching

Answer 16

Boiler equipped with superheaters

Question 17

When steam is superheated the_____

Pressure is increased along with its pressure

Volume increased

Temperature increases with no increase in pressure

Pressure increase

Answer 17

Temperature increases with no increase in pressure

Question 18

When a boiler is inspected the two main steam stop valves are____

Left wide open

Closed, locked, and tagged

Left as the operator prefers

Answer 18

Closed, locked, and tagged

Question 19

Cast iron is used for the construction of water columns up to_____psi

15
250
500
2000

Answer 19

250