851. In a boiler, the heat is lost
to dry flue gases
in moisture present in the fuel
to steam formed by combustion of hydrogen per kg of fuel
all of the above
✅ The correct answer is option D.
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.
852. The specific weight of water in S.I. units is taken as
9.81 kN/m3
9.81 x 103 kN/m3
9.81 x 10-6 N/mm3
any one of these
✅ The correct answer is option A.
853. In plunge grinding
the work is reciprocated as the wheel feeds to produce cylinders longer than the width of wheel face
the work rotates in a fixed position as the wheel feeds to produce cylinders equal to or shorter than the width of wheel face
the work is reciprocated as the wheel feeds to produce cylinders shorter than the width of wheel face
the work rotates in a
✅ The correct answer is option B.
854. A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of
75% iso-octane and 25% normal heptane
75% normal heptane and 25% iso-octane
75% petrol and 25% diesel
75% diesel and 25% pet
✅ The correct answer is option A.
855. Enriched uranium may contain fissionable contents from
1 to 40%
10 to 50%
1 to 80%
1 to 99%
✅ The correct answer is option D.
856. Which of the following bulb in a car will have the least wattage ?
Head light bulb
Stop light bulb
Parking light bulb
Ignition warning bulb
✅ The correct answer is option D.
857. The design of thin cylindrical shells is based on
hoop stress
longitudinal stress
arithmetic mean of the hoop and the longitudinal stress
geometric mean of the
✅ The correct answer is option A.
858. The dedendum is the radial distance from the
pitch circle to the top of a tooth
pitch circle to the bottom of a tooth
top of a tooth to the bottom of a tooth
addendum circle to the
✅ The correct answer is option B.
859. The boiling point of ammonia is
-10.5°C
-30°C
-33.3°C
-77.7°C
✅ The correct answer is option C.
860. The natural frequency of free transverse vibrations is same as that of free longitudinal vibrations.
Right
Wrong
✅ The correct answer is option A.