MCQs on Design of IC Engine Components
1 - Question
Compression Ratio in diesel engine is lesser than that in Spark Ignition engine.
a) True
b) No
c) They are equal
d) Doesn’t matter
View Answer
Answer: b
Explanation: In diesel engine, there is no spark to ignite, charge is compressed to greater extent to support self-ignition.
2 - Question
Petrol engine are more economical than diesel engine.
a) True
b) False
View Answer
Answer: b
Explanation: Diesel engine have better thermal efficiency and hence are more economical.
3 - Question
There are ____ types of liners.
a) 1
b) 2
c) 3
d) 4
View Answer
Answer: b
Explanation: Dry liners and wet liners.
4 - Question
If no re boring allowance is to be given, then thickness of cylinder wall is max pressure is 3.5N/mm², bore diameter=200mm and permissible tensile stress is 40N/mm².
a) 7mm
b) 8mm
c) 9mm
d) 10mm
View Answer
Answer: c
Explanation: t=pD/2σ=8.75mm.
5 - Question
If diameter of cylinder of bore is 120mm, then thickness of the cylinder will be
a) Information not sufficient
b) 7mm
c) 12mm
d) 6mm
View Answer
Answer: b
Explanation: t=0.045D + 1.6.
6 - Question
If diameter of cylinder bore is 120mm, then thickness of dry liner will be
a) 2.2mm
b) 3.6mm
c) 4.8mm
d) 6mm
View Answer
Answer: b
Explanation: t= 0.03D to 0.035D.
7 - Question
If diameter of cylinder bore is 120mm, then thickness of water jacket wall will be
a) 4.26mm
b) 5.25mm
c) 2.56mm
d) All of the listed
View Answer
Answer: d
Explanation: p=t/3 to 3t/4, where t= thickness of cylinder wall=7mm.
8 - Question
If diameter of cylinder bore is 120mm, then thickness of water cylinder flange will be
a) 8.8mm
b) 10.2mm
c) 7.8mm
d) 12mm
View Answer
Answer: a
Explanation: q=1.2t to 1.4t.
9 - Question
If nominal diameter of bolt used is 20mm, then find the radial distance between outer diameter of flange and pitch circle diameter of studs.
a) 24mm
b) 28mm
c) 32mm
d) 36mm
View Answer
Answer: b
Explanation: r=d+6 to 1.5d i.e. 26mm to 30mm.
10 - Question
The circumferential hoop stress and longitudinal stress are both shear stress.
a) True
b) False
View Answer
Answer: b
Explanation: They both are tensile stress.
11 - Question
The circumferential hoop stress and longitudinal stress act in same direction and hence are straight away added.
a) True
b) False
View Answer
Answer: b
Explanation: They both act perpendicularly to each other and thus net stress in these directions is reduced.