Steam and Gas Turbines Questions and Answers – Disk Stresses and Blade Fastening

This set of Steam and Gas Turbines Multiple Choice Questions & Answers (MCQs) focuses on “Disk Stresses and Blade Fastening”.

1. Rotating disks are subjected to _______
a) mechanical stress
b) thermal stress
c) mechanical & thermal stress
d) none of the mentioned
View Answer

Answer: c
Explanation: Rotating disks are subjected to both mechanical and thermal stresses.

2. Internal pressure on the disk are due to _______
a) broken fittings
b) expanded fittings
c) shrink fitted on its mountings
d) none of the mentioned
View Answer

Answer: c
Explanation: Internal pressure on disk is caused due to shrink fitted on its mountings.

3. Finite element analysis is done for rotating disk.
a) True
b) False
View Answer

Answer: a
Explanation: Different temperatures are established when hot gasses are passed and hence finite element analysis is done.
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4. High stresses in rotating disks are caused due to _______
a) excessive temperature
b) excessive rotating speeds
c) excessive temperature & rotating speeds
d) none of the mentioned
View Answer

Answer: b
Explanation: High stresses in rotating disks are caused due to excessive rotating speeds.

5. Rotational disks deform due to ______________
a) uni symmetrical
b) multi symmetrical
c) axi symmetrical
d) none of the mentioned
View Answer

Answer: c
Explanation: Deformation of rotational disks is axi symmetrical.
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6. Gas turbine discs are made of _______
a) Chromium
b) Chrome-Nickel steel alloy
c) Nickel
d) None of the mentioned
View Answer

Answer: b
Explanation: Chrome-nickel steel alloy is used to make gas turbine discs in general.

7. Contact at fastening between blade root and disk staple is ________
a) one dimensional
b) two dimensional
c) three dimensional
d) none of the mentioned
View Answer

Answer: c
Explanation: Three dimensional contact is maintained at fastening between blade root and disk staple.
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8. Some of the fasteners are _______
a) Bolts
b) Nuts
c) Keys
d) All of the mentioned
View Answer

Answer: d
Explanation: Keys, Nuts and Bolts are some fasteners in turbine generator steam turbines.

9. ________ are used to secure some fasteners which have tendency to slip or slide away.
a) Bolts
b) Nuts
c) Washers
d) None of the mentioned
View Answer

Answer: c
Explanation: Washers are used to lock fasteners which slip or slide away.
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10. Bolts are _______ fasteners.
a) locking fasteners
b) threaded fasteners
c) frictional fastener
d) none of the mentioned
View Answer

Answer: b
Explanation: Bolts are threaded fasteners as they have threading on them.

Sanfoundry Global Education & Learning Series – Steam and Gas Turbines.

To practice all areas of Steam and Gas Turbines, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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