4931. Delivery head of water of a centrifugal pump is inversely proportional to diameter of its impeller.
Yes
No
✅ 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.
4932. In unilateral system of tolerance, the tolerance is allowed on
one side of the actual size
one side of the nominal size
both sides of the actual size
both sides of the nominal size
✅ The correct answer is option B.
4933. The steam enters the nozzle at a
high pressure and a low velocity
high pressure and a high velocity
low pressure and a low velocity
low pressure and a high velocity
✅ The correct answer is option A.
4934. In a spark plug, when the temperature of the central electrode exceeds a certain temperature, any carbon that has adhered will be burnt off, and the temperature at which this burning off carbon starts is referred to as the self cleaning temperature.
Correct
Incorrect
✅ The correct answer is option A.
4935. A water cooled condenser operates at a __________ condensing temperature than an air-cooled condenser.
higher
lower
✅ The correct answer is option B.
4936. When the steel is normalised, its
yield point increases
ductility decreases
ultimate tensile strength increases
all of these
✅ The correct answer is option D.
4937. In ultra-sonic machining, the metal is removed by
using abrasive slurry between the tool and work
direct contact of tool with the work
maintaining an electrolyte between the work and tool in a very small gap between the two
erosion caused by rapidly recurring spark discharges between the tool and work
✅ The correct answer is option A.
4938. Rotary compressors are used for delivering
small quantities of air at high pressures
large quantities of air at high pressures
small quantities of air at low pressures
large quantities of air at low pressures
✅ The correct answer is option D.
4939. There is no change in internal energy in an isothermal process.
Correct
Incorrect
✅ The correct answer is option A.
4940. The lower critical temperature
decreases as the carbon content in steel increases
increases as the carbon content in steel increases
is same for all steels
depends upon the rate of heating
✅ The correct answer is option C.