Online Mechanical Engineering Test - Mechanical Engineering Test - Random

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Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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A framed structure is imperfect, if the number of members are __________ (2j - 3).

equal to

less than

greater than

either (b) or (c)

[#]

A circular hole of 50 mm diameter is cut out from a circular disc of 100 mm diameter as shown in the below figure. The centre of gravity of the section will lie

in the shaded area

in the hole

at O

[#]

The maximum deflection of a fixed beam of length l carrying a total load W uniformly distributed over the whole length is

[#]

According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)

A x M x m^1/2 x i^2/3

A x M x m^2/3 x i^1/2

A^1/2 x M^2/3 x m x i

A^2/3 x M^1/3 x m x i

[#]

The number of buckets on the periphery of a Pelton wheel is given by

[#]

An isothermal process is governed by

Boyle's law

Charles' law

Gay-Lussac law

Avogadro's law

[#]

For a perfect gas, according to Boyle's law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)

p v = constant, if T is kept constant

v/T = constant, if p is kept constant

p/T = constant, if v is kept constant

T/p = constant, if v is kept constant

[#]

The ultimate analysis of coal consists of the determination of the percentage of

carbon

hydrogen and nitrogen

sulphur and ash

all of these

[#]

The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be

0.4

0.56

0.67

1.67

[#]

10.

The compounding of turbines is done in order to

reduce speed of rotor

improve efficiency

reduce exit losses

all of these

[#]

11.

In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,

velocity increases

velocity decreases

velocity remains constant

pressure remains constant

[#]

12.

In a compressor, work is done on the piston during suction of air and work is done by the piston during compression as well as delivery of air.

Agree

Disagree

[#]

13.

The specific humidity during dehumidification process

remains constant

increases

decreases

[#]

14.

When the shaft rotates in anticlockwise direction at slow speed in a bearing, it will

have contact at the bottom most of the bearing

move towards right of the bearing making the metal to metal contact

move towards right of the bearing making no metal to metal contact

move towards left of the bearing making metal to metal contact

[#]

15.

A shaft coupling should

be easy to connect or disconnect

transmit full power of the shaft

hold the shafts in perfect alignment

all of these

[#]

16.

In low carbon steels, __________ raises the yield point and improves the resistance to atmospheric corrosion.

sulphur

phosphorus

manganese

silicon

[#]

17.

A fine grained grinding wheel is used to grind hard materials.

Correct

Incorrect

[#]

18.

A better machinable metal is one which gives

lower chip-tool contact area and larger shear angle

higher chip-tool contact area and smaller shear angle

lower chip-tool contact area and smaller shear angle

higher chip-tool contact area and larger shear angle

[#]

19.

An oil filter bypass valve opens when the

engine is cold

engine overheats

oil filter becomes clogged

engine runs at high speed

[#]

20.

The minimum number of teeth on the pinion which will mesh with any gear without interference for 20° full depth involute teeth will be

[#]

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Online Mechanical Engineering Test - Mechanical Engineering Test - Random

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