891. The distance between the centres of rivets in adjacent rows of zig-zag riveted joint, is called back pitch.
TRUE
FALSE
✅ 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.
892. A block ot mass 20 kg lying on a rough horizontal plane is connected by a light string passing over a smooth pulley to another mass 5 kg, which can move freely in the Vertical direction, as shown in the below figure. The tension in the string will __________ with the increase in coefficient of friction.
increase
decrease
not be effected
✅ The correct answer is option A.
893. The flank of the tooth is the
surface of the top of the tooth
surface of the tooth above the pitch surface
surface of the tooth below the pitch surface
width of the tooth mea
✅ The correct answer is option C.
894. The instantaneous centre of a rigid thin disc rolling on a plane rigid surface is located at
the centre of the disc
the point of contact
an infinite distance on the plane surface
the point on the circu
✅ The correct answer is option B.
895. Break even analysis consists of
fixed expenses
variable cost
sales revenue
all of these
✅ The correct answer is option D.
896. Shear modulus is the ratio of
linear stress to linear strain
linear stress to lateral strain
volumetric strain to linear strain
shear stress to shear
✅ The correct answer is option D.
897. A screw is said to be a self locking screw, if its efficiency is
less than 50 %
more than 50%
equal to 50%
none of these
✅ The correct answer is option A.
898. Kelvin-Planck’s law deals with
conservation of work
conservation of heat
conversion of heat into work
conversion of work int
✅ The correct answer is option C.
899. A machine having an efficiency less than 50%, is known as
reversible machine
non-reversible machine
neither reversible nor non-reversible machine
ideal machine
✅ The correct answer is option B.
900. The efficiency ratio is the ratio of total useful heat drop to the total isentropic heat drop.
Agree
Disagree
✅ The correct answer is option A.