# Steam and Gas Turbines Questions and Answers – Regenerator Types and Mean Temperature Difference

This set of Steam and Gas Turbines Multiple Choice Questions & Answers focuses on “Regenerator Types and Mean Temperature Difference”.

1. In rotary regenerators matrix is __________
a) constant
b) varying
c) zero
d) none of the mentioned

Explanation: In rotary regenerators matrix rotates continuously.

2. In rotary regenerators matrix is ________
a) isothermal
b) isochoric
c) constant pressure process
d) none of the mentioned

Explanation: In rotary regenerators matrix is isothermal.

3. In rotary regenerators rotation is _________ to the flow direction.
a) parallel
b) perpendicular
c) concurrent
d) none of the mentioned

Explanation: In rotary regenerator rotation is always perpendicular to the flow direction.

4. In rotary regenerator rotation is __________ to the temperature gradient.
a) parallel
b) congruent
c) perpendicular
d) none of the mentioned

Explanation: In rotary regenerator rotation is always perpendicular to both temperature gradient and flow direction.

5. In rotary regenerators fluid temperature is __________ across the flow area.
a) constant
b) varying
c) zero
d) none of the mentioned

Explanation: In rotary regenerators fluid temperature varies across the flow area.
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6. In fixed matrix regenerator the fluid is ducted to the valves to flow through various matrices.
a) True
b) False

Explanation: In fixed matrix regenerator the fluid is ducted to the valves to flow through various matrices.

7. Outlet temperatures of fixed matrix regenerator is ______ with time.
a) constant
b) varying
c) zero
d) none of the mentioned

Explanation: Outlet temperatures of the fixed matrix regenerator varies with time.

8. Micro scale regenerator has multi grating structure.
a) True
b) False

Explanation: Micro scale regenerator has multi grating structure.

9. In micro scale regenerator each layer is _______ from the adjacent layer.
a) equal
b) subset
c) offset
d) none of the mentioned

Explanation: In micro scale regenerator each layer is offset from the adjacent layer.

10. Rothemuhle regenerator has a _______ matrix in a disk shape.
a) moving
b) fixing
c) no matrix
d) none of the mentioned

Explanation: Rothemuhle regenerator has a fixed matrix in a disk shape.

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