2721. The centre to centre distance between two consecutive rivets in a row, is called
margin
pitch
back pitch
diagonal pitch
✅ The correct answer is option B.
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.
2722. A diesel engine is __________ as compared to petrol engine, both running at rated load.
equally efficient
less efficient
more efficient
✅ The correct answer is option C.
2723. Chemical milling operation is performed
on universal milling machine
on plain milling machine
in a tank containing an etching solution
any one of these
✅ The correct answer is option C.
2724. When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is
1.84(L – 0.1nH)H3/2
1.84(L – nH)H2
1.84(L – 0.1nH)H5/2
1.84(L – nH)H3
✅ The correct answer is option A.
2725. The power per tonne of refrigeration is
3.5/C.O.P.
C.O.P/3.5
3.5 x C.O.P.
none of these
✅ The correct answer is option A.
2726. In a four cylinder in-line engine, the number of firing strokes in one revolution of the crank is
1
2
3
4
✅ The correct answer is option B.
2727. The process of heat transfer from one particle of the body to another is called conduction, when the particles of the body
move actually
do not move actually
affect the intervening medium
does not affect the in
✅ The correct answer is option B.
2728. The siphon will work satisfactorily, if the minimum pressure in the pipe is __________ vapour pressure of liquid.
equal to
less than
more than
✅ The correct answer is option C.
2729. The use of heat exchangers is made in
radiators in automobile
condensers and boilers in steam plants
condensers and evaporators in refrigeration and air conditioning units
all of the above
✅ The correct answer is option D.