Organizer: The Mechanical Engineering Department of Lloyd Institute of Engineering & Technology
About the Quiz
- Topic : Mechanical Engineering Quiz Competition (Engineer’s Day 2024)
- (Total-25 Questions)
- Free Participants
- Start Date: 15th September, 2024 (From 11.00 AM)
- End Date: 17th September 2024 (up to 11.00 PM)
- Certificate will be provided to All Participants.
- Put your engineering and general knowledge to the test? Come and celebrate the brilliance of engineering with us and prove your skills!
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100% Correct Answers Here
Question 1 to 10
Q.1 The hardness of steel depends on :*
1 point
Basic process from which it is produced
The shape and distribution of carbides in iron
Amount of carbon it contains
Heating temperature before quenching
Q.2 Materials in order of reducing electrical conductivity are : *
1 point
Aluminium, Silver, Gold, Copper
Copper, Silver, Gold, Aluminium
Gold, Silver, Copper, Aluminium
Silver, Copper, Gold, Aluminium
Q.3 Two cubical castings of the same metal and sizes of 2 cm and 4 cm side are moulded in green sand. If the smaller casting solidifies in 2 minutes, the expected time of solidification of larger casting will be : *
1 point
8 minutes
10 minutes
4 minutes
3 minutes
Q.4 A 200 x 100 x 50 mm steel block is subjected to a hydrostatic pressure of 15 MPa. The Young’s modulus and Poisson’s ratio of the material are 200 GPa and 0.3 respectively. The change in the volume of the block is:*
1 point
100 mm^3
105 mm^3
80 mm^3
90 mm^3
Q.5 Force required to punch a 15 mm hole in a mild steel pipe 5 mm thick, when ultimate shear stress of the plate is 500 N/mm2, will be nearly: *
1 point
98 kN
158 kN
118 kN
78 kN
Q.6 A solid circle shaft of 60 mm diameter transmit a torque of 1600 N-m. The value of maximum shear stress developed is:*
1 point
57.72 MPa
47.72 MPa
37.72 MPa
67.72 MPa
Q.7 If the pressure angle of the rack is 20 degrees, the force acting along the line of action between the rack and gear teeth is:*
1 point
20 N-m
25 N-m
32 N-m
50 N-m
Q.8 The coupling used to connect two shafts with large annular misalignment is:*
1 point
A Flange Coupling
A Hooke’s Joint
An Oldham’s Coupling
A Flexible Bush Coupling
Q.9 For two meshing gears, their:*
1 point
No. of teeth must be same
Addendum must be same
Dedendum must be same
Module must be same
Q.10 A key connecting a flange coupling to a shaft is likely to fail in:*
1 point
Bending
Torsion
Shear
Tension
Question 11 to 20
10 of 10 points
Q.11 In case of involute gears:*
1/1
Interference is inherently absent
A convex flank is always in contact with concave flank
Pressure angle is constant throughout the teeth engagement
Variation in centre distance of shafts increases radial force
Q.12 A 100 W electric bulb was switched on in a 2.5 m * 3 m * 3 m size thermally insulated room having a temperature of 20 deg C. The room temperature at the end of 24 hours will be:*
1/1
470 deg C
321 deg C
341 deg C
450 deg C
Q.13 The efficiency of a Rankine cycle may be expected to:*
1/1
Increase with decreasing temperature of heat rejection
Decrease with decreasing temperature of heat rejection
Decrease with increasing temperature of heat rejection
Increase with increasing exhaust pressure
Q.14 A Carnot refrigerator extracts 150 kJ of heat per minute from space which is maintained at −23 deg C and is discharged to atmosphere at 27 deg C. The work required to run the compressor is :*
1/1
40 kJ/min
20 kJ/min
10 kJ/min
30 kJ/min
For air at a given temperature, as the relative humidity is increased isothermally:*
1/1
the wet bulb temperature and specific enthalpy increase
the wet bulb temperature and specific enthalpy decrease
the wet bulb temperature increases and specific enthalpy decreases
the wet bulb temperature decreases and specific enthalpy increases
Q.16 For the same heat input and same compression ratio :*
1/1
Otto cycle and Diesel cycle are equally efficient
Otto cycle is less efficient than diesel cycle
Efficiency depends mainly on working substance
None of the above
Q.17 A hydro-electric site has a head of 100 m and an average discharge of 10 cubic meter per second (m3/s). Assume 92% efficiency, for a greater speed of 6000 rpm, the specific speed of turbine would be:*
1/1
1000
600
1500
400
Q.18 For laminar flow through a long pipe, the pressure drop per unit length increases:*
1/1
in linear proportion to the cross-sectional area
in proportion to the diameter of the pipe
in inverse proportion to the cross-sectional area
in inverse proportion to the square of cross-sectional area
Q.19 Which type of pump is different from others in the same group ?*
1/1
Plunger pump
Lobe pump
Gear pump
Screw pump
Q.20 An air vessel is provided at the summit in a syphon to:*
1/1
Regulate the flow
Increase velocity
Increase discharge
Avoid an interruption in the flow
Question 21 to 25
5 of 5 points
Q.21 Depreciation charges for a machine are thirty paise per working hour. The machine has a scrap value of ₹ 2000 and a working hour average life of 24000 hours. The purchase price of the machine would be :*
1/1
₹ 1800
₹ 9200
₹ 7200
₹ 14275
Q.22 When the annual demand of a product is 24000 units, the EOQ (Economic Order Quantity) is 2000 units. If the annual demand is 48000 units, the most appropriate EOQ will be:*
1/1
1000 units
2000 units
2800 units
4000 units
Q.23 Machines screws are:*
1/1
Screws with rounded head
Generally provided with head longer than that of a normal screw
Screws with button-head
Provided with slotted head and used with a nut
Q.24 For the best utilization of fuel, in the engine cylinder, the air supply should be :*
1/1
About 25% surplus
15 to 20 percent deficient
About 10% surplus
5 to 10 percent deficient
Q.25 The frame provided for supporting the units of chassis and the body, in case of Tata vehicles is:*
1/1
Cross member – type frame
Centre beam frame
Y-shaped tube frame
Self-supporting structure