4151. A turbine develops 10000 kW under a head of 25 metres at 135 r.p.m. Its specific speed is
175.4 r.p.m.
215.5 r.p.m.
241.5 r.p.m.
275.4 r.p.m
✅ 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.
4152. A company spends considerable amount on publicity to promote sales. This expenditure in break even chart is shown below the
fixed cost line
variable cost line
total cost line
sales revenue line
✅ The correct answer is option B.
4153. Which of the following operations can be performed with milling cutters?
cutting key ways on shafts
cutting external screw threads
cutting teeth of spur gears
all of these
✅ The correct answer is option D.
4154. The oxygen cylinder is usually painted with
black colour
white colour
maroon colour
yellow colour
✅ The correct answer is option A.
4155. According to Indian standard specifications, a plain carbon steel designated by 40 C8 means that the carbon content is
0.04%
0.35 to 0.45%
0.4 to 0.6%
0.6 to 0.8%
✅ The correct answer is option B.
4156. According to Indian standard specifications, SG 400/15 means
spheroidal graphite cast iron with B.H.N. 400 and minimum tensile strength 15 MPa
spheroidal graphite cast iron with minimum tensile strength 400 MPa and 15 percent elongation
spheroidal graphite cast iron with minimum compressive strength 400 MPa and 15 percent reduction in area
none of the above
✅ The correct answer is option B.
4157. One kilowatt is equal to
1 N-m/s
100 N-m
1000 N-m/s
1 x 106 N-m/s
✅ The correct answer is option C.
4158. The torsional rigidity of a shaft is given by
T/J
T/θ
T/r
T/G
✅ The correct answer is option B.
4159. Deep groove ball bearings are used for
heavy thrust load only
small angular displacement of shafts
radial load at high speed
combined thrust and ra
✅ The correct answer is option D.
4160. The basic purpose of tyres is to
grip the road and provide good traction
substitute for springs
act as brake
none of these
✅ The correct answer is option A.