Automotive Engine Components Design Questions and Answers – IC Engine – Stresses in Cylinder Wall

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This set of Automotive Engine Components Design Multiple Choice Questions & Answers (MCQs) focuses on “IC Engine – Stresses in Cylinder Wall”.

1. Longitudinal stress doesn’t act on the cylinder.
a) True
b) False
View Answer

Answer: b
Explanation: Circumferential hoop stress and the longitudinal stress are the two principal stresses that act on the engine cylinder. So, longitudinal stress act on the cylinder.
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2. Calculate the net circumferential stress when σc=20N/mm2, σI=11N/mm2 and μ=0.2.
a) 17.8N/mm2
b) 16.5N/mm2
c) 16.5N/m2
d) 16.3N/mm3
View Answer

Answer: a
Explanation: (σc)netc-μσI
=20-0.2×11
=17.8N/mm2

3. Calculate the net longitudinal stress σc=20N/mm2, σI=11N/mm2 and μ=0.2
a) 6N/mm2
b) 7N/mm2
c) 8N/mm2
d) 9N/mm2
View Answer

Answer: a
Explanation: (σI)netI-μσc
=11-0.2×20
=7N/mm2
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4. Calculate the net minimum outer diameter of the cylinder, when the inner diameter of the cylinder is 140mm and thickness is 11mm.
a) 153mm
b) 170mm
c) 160mm
d) 162mm
View Answer

Answer: d
Explanation: D0=D+2t
=140+2(11)
=162mm

5. Calculate the thickness of the cylinder when Pmax=3MPa, D=150mm, C=4and σc=45N/mm2.
a) 9mm
b) 6mm
c) 7mm
d) 8mm
View Answer

Answer: a
Explanation: t=\(\frac{P_{max}\times D}{2\sigma}\)+C
=\(\frac{3×150}{2×45}+4\)
=5+4
=9mm
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6. Calculate the apparent circumferential stress, when Pmax=3.5MPa, D=140mm, and t=8mm?
a) 12.3N/mm2
b) 14.4N/mm2
c) 15.3N/mm2
d) 16.1N/mm2
View Answer

Answer: c
Explanation: σ c=\(\frac{P_{max}D}{2t}\)
=\(\frac{3.5×140}{2×16}\)
=15.3N/mm2

7. Calculate the apparent longitudinal stress when Do=162mm, D=140mm, Pmax=3MPa.
a) 8.85N/mm2
b) 9.32N/mm2
c) 6.66N/mm2
d) 7.65N/mm2
View Answer

Answer: a
Explanation: σI=\(\frac{P_{max}D^2}{Do^2-D^2}\)
=\(\frac{3×140^2}{(162^2×140^2)}\)
=8.85N/mm2
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8. In the formula (σI)netI-μσc, what is µ?
a) Yield point
b) Hoop constant
c) Stress constant
d) Poisson’s ratio
View Answer

Answer: d
Explanation: μ is Poisson’s ratio, it is the ratio of transverse contraction strain to the longitudinal extension strain. σI is the longitudinal stress and σc is the circumferential stress.

Sanfoundry Global Education & Learning Series – Automotive Engine Components Design.

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To practice all areas of Automotive Engine Components Design, here is complete set of 1000+ Multiple Choice Questions and Answers.

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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 is Linux Kernel Developer & SAN Architect and is passionate about competency developments in these areas. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage, Advanced C Programming, SAN Storage Technologies, SCSI Internals & Storage Protocols such as iSCSI & Fiber Channel. Stay connected with him @ LinkedIn | Youtube | Instagram | Facebook | Twitter