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Question 1

Section of transfer line in which flow is in an upward direction is called

Options :

A : cyclone of FCCU

B : Plenum of FCCU

C : Riser of FCCU

D : None of the above

Answer: C

Question 2

As per ASTM C- 704, for the erosion tests, silicon carbide grit to be used by

Options :

A : one time

B : two time

C : three time

D : none of the above

Answer: A

Question 3

Spalling of layers from the hot surface of a refractory lining is called

Options :

A : spalling

B : sheeting

C : crumbling

D : erosion

Answer: B

Question 4

Which of the following is the appropriate term for testing refractory that was sampled during project site installation in order to confirm that it meets specified physical property standards?

Options :

A : Hammer testing

B : Pre-qualification testing

C : As-installed testing

D : Visual testing

Answer: C

Question 5

Which of the following conditions must be met for test results from trial mixes of low cement castables to be accepted for qualification?

Options :

A : The water content must not vary more than ±1.0% from that recommended by the manufacturer.

B : Specimens must be fired at 1500°F (815°C) and held for a minimum of 3 hours.

C : Bulk density and CCS must exceed average values published in ASTM C401.

D : The drying process must be conducted at 220°F (104°C) for at least 48 hours before firing.

Answer: A