Online Mechanical Engineering Test - Mechanical Engineering Test - Random

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Total number of questions: 20.
Time allotted: 30 minutes.
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The direct stress, across a principal plane, is known as principal stress.

Yes

[#]

The bending moment at the centre of a simply supported beam with a gradually varying load from zero at both ends to w per metre at the centre is wl/4.

Yes

[#]

Transverse fillet welds are designed for

tensile strength

compressive strength

shear strength

bending strength

[#]

The section modulus (Z) of a beam is given by

I/y

I.y

y/I

M/I

[#]

Coefficient of contraction is the ratio of

actual velocity of jet at vena contracta to the theoretical velocity

loss of head in the orifice to the head of water available at the exit of the orifice

actual discharge through an orifice to the theoretical discharge

area of jet at vena contracta to the area of orifice

[#]

The relation between hydraulic efficiency (η_h), mechanical efficiency (η_m) and overall efficiency (η_o) ) is

η_h = η_o x η_m

η_m = η_o x η_h

η_o = η_h x η_m

none of these

[#]

The workdone in a free expansion process is zero.

True

False

[#]

When the total heat of steam is h kJ/kg and the sensible heat of feed water is h_f1 kJ/kg, then the factor of evaporation is given by

none of these

[#]

In a 50% reaction turbine stage, tangential component of absolute velocity at rotor inlet is 537 m/s and the blade velocity is 454 m/s. The power output in kW of steam will be

260 kW

282 kW

296 kW

302 kW

[#]

10.

The bearings of heavy series have capacity __________ over the medium series.

10 to 20%

20 to 30%

30 to 40%

40 to 50%

[#]

11.

A shoe brake is commonly used in railway trains.

Yes

[#]

12.

Oldham coupling is used to transmit power between two parallel shafts which are slightly offset.

True

False

[#]

13.

A connecting rod subjected to an axial load may buckle with

X-axis as neutral axis

Y-axis as neutral axis

X-axis or Y-axis as neutral axis

Z-axis

[#]

14.

Failure of a material is called fatigue when it fails

at the elastic limit

below the elastic limit

at the yield point

below the yield point

[#]

15.

Nimonic contains __________ percentage of nickel as that of Inconel.

same

less

[#]

16.

Quenching is not necessary when hardening is done by

case hardening

flame hardening

nitriding

any one of these

[#]

17.

The production scheduling is simpler and high volume of output and high labour efficiency are achieved in the case of

product layout

process layout

fixed position layout

a combination of line and process layout

[#]

18.

Travel charts are used to

analyse material handling

determine inventory control difficulties

plan material handling procedure and routes

all of the above

[#]

19.

If a tyre is designated as 175/65 R14 82 S, then the aspect ratio for the tyre is

175

[#]

20.

The velocity of the rubbing surface __________ with the distance from the axis of the bearing.

increases

decreases

[#]

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Online Mechanical Engineering Test - Mechanical Engineering Test - Random

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