A ______ fuse is necessary for a circuit with a load of 21,000 watts and a voltage of 220 volts.
A. 100
B. 150
C. 175
D. 200
A. 100 amps. Note: V = IR Therefore I = V/R 21,000 amps /220 volts = 95 amps
At 0 psig, how many BTU's are required to change 1 lb of water at 212F to steam?
A. 144
B. 180
C. 970
D. 1190
C. 970 BTU
3 multiple choice options
,Radiation is:
A. the movement of liquids or gases created by a temperature difference.
B. Heat transfer by direct molecular contact
C. the weight of a substance compared to unity
D. Heat transfer by waves
D. Heat transfer by waves
Sensible heat is:
A. An established relationship comparing any substance to the heat content of water.
B. Heat quantity that can be felt or measured by a thermometer
C. Heat quantity above the saturation point
D. Measure of heat intensity
B. Heat quantity that can be felt or measured by a thermometer
,All steam lines should be pitched:
A. In the direction of flow
B. Back towards the boiler
C. Level
D. For convenience
A. In the direction of flow
Draw a simple picture of a Sterling Boiler. Label it.
Describe the water flow through a Sterling Boiler
Feedwater flows to 1) rearmost drum 2) down to the mud drum 3) up to middle drum 4) to front drum through
crossover pipes and 5) back down to mud drum
, Draw a picture of a Scotch Boiler. Label the firebox, combustion chamber, crown sheet, tubes, feed water inlet,
steam outlet, stack, Economizer and Superheater.
Draw a picture of a Firetube Boiler. Label it.
Draw a picture of a Locomotive Fire Tube Boiler. Label it.
A. 100
B. 150
C. 175
D. 200
A. 100 amps. Note: V = IR Therefore I = V/R 21,000 amps /220 volts = 95 amps
At 0 psig, how many BTU's are required to change 1 lb of water at 212F to steam?
A. 144
B. 180
C. 970
D. 1190
C. 970 BTU
3 multiple choice options
,Radiation is:
A. the movement of liquids or gases created by a temperature difference.
B. Heat transfer by direct molecular contact
C. the weight of a substance compared to unity
D. Heat transfer by waves
D. Heat transfer by waves
Sensible heat is:
A. An established relationship comparing any substance to the heat content of water.
B. Heat quantity that can be felt or measured by a thermometer
C. Heat quantity above the saturation point
D. Measure of heat intensity
B. Heat quantity that can be felt or measured by a thermometer
,All steam lines should be pitched:
A. In the direction of flow
B. Back towards the boiler
C. Level
D. For convenience
A. In the direction of flow
Draw a simple picture of a Sterling Boiler. Label it.
Describe the water flow through a Sterling Boiler
Feedwater flows to 1) rearmost drum 2) down to the mud drum 3) up to middle drum 4) to front drum through
crossover pipes and 5) back down to mud drum
, Draw a picture of a Scotch Boiler. Label the firebox, combustion chamber, crown sheet, tubes, feed water inlet,
steam outlet, stack, Economizer and Superheater.
Draw a picture of a Firetube Boiler. Label it.
Draw a picture of a Locomotive Fire Tube Boiler. Label it.
