[D2L] Final Exam 오답

Question 1

Sour gas contains ____ which has a sour smell

Answer 1

Hydrogen Sulphide

Question 2

If liquid propane were to spill in a bucket of water, it would tend to sink below the water.

T or F

Answer 2

False

Question 3

What pressure is propane after the 1st stage regulator delivered?

1) 11” wc
2) 14” wc
3) 2-10 psi
4) 5-15 psi

Answer 3

2-10 psi

Question 4

The ratio of the density of a substance to that of a standard substance is the term …

inches of mercury
specific gravity
specific volume
pascal

Answer 4

specific gravity

Question 5

What must be done with a commercial cracked heat exchanger?

It may be temporarily repaired if approved by a Safety Codes Officer
It may be repaired with High temp silicone
Appliance turned off and must be not be turned back on until replaced
Both A and C

Answer 5

??

Question 6

how much propane will it take to heat a 70 imp.gallon hot water tank from an inlet temperature of 66F to an outlet temperature of 97F if the unit has an 90% efficient 60000 Btu/hr burner? Please provide your answer to two decimal places.

Answer 6

972.23 lb/cuft