1111. If petrol is used in a diesel engine, then
low power will be produced
efficiency will be low
higher knocking will occur
black smoke will be pr
✅ The correct answer is option C.
Mechanical Engineering
Prepare with the best Mechanical Engineering MCQs with answers and explanations for exams, interviews, and job tests. Our collection covers core topics such as engineering mechanics, thermodynamics, strength of materials, theory of machines, fluid mechanics, heat transfer, manufacturing processes, machine design, and power plant engineering. These Mechanical Engineering multiple-choice questions are designed for students, fresh graduates, and professionals preparing for NTS, PPSC, FPSC, PEC exams, GATE, university entry tests, and recruitment assessments. Strengthen your technical knowledge and problem-solving ability with our updated and comprehensive Mechanical Engineering MCQs.
1112. The air standard efficiency of an I.C. engine depends on
fuel used
speed of engine
compression ratio
none of these
✅ The correct answer is option C.
1113. The ratio of linear stress to the linear strain is called
modulus of rigidity
modulus of elasticity
bulk modulus
Poisson’s ratio
✅ The correct answer is option B.
1114. The two kinds of piston rings are
compression and oil-control rings
compression and sliding seal rings
oil scrapper and oil-control rings
pressure and sealing r
✅ The correct answer is option A.
1115. In a simple bending theory, one of the assumption is that the material of the beam is isotropic. This assumption means that the
normal stress remains constant in all directions
normal stress varies linearly in the material
elastic constants are same in all the directions
elastic constants vari
✅ The correct answer is option C.
1116. Iron-carbon alloys containing 4.3% carbon are known as hypo-eutectic cast irons.
Correct
Incorrect
✅ The correct answer is option B.
1117. If the size of a standard specimen for a fatigue testing machine is increased, the endurance limit for the material will
have same value as that of standard specimen
increase
decrease
✅ The correct answer is option C.
1118. The strength of a riveted joint is equal to
tearing strength of plate (Pt)
shearing strength of rivet (Ps)
crushing strength of rivet (Pc)
least value of Pt Ps a
✅ The correct answer is option D.
1119. The form factor of a helical gear __________ with the increase in the helix angle.
increases
decreases
remains constant
✅ The correct answer is option A.
1120. Silicon bronze contains
60% copper, 35% zinc and 5% manganese
88% copper, 10% tin and 2% zinc
96% copper, 3% silicon and 1% manganese
76% copper, 20% silico
✅ The correct answer is option C.