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Test: Mechanical Engineering- 11

100 Questions MCQ Test Mechanical Engineering SSC JE (Technical) | Test: Mechanical Engineering- 11

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This mock test of Test: Mechanical Engineering- 11 for Mechanical Engineering helps you for every Mechanical Engineering entrance exam. This contains 100 Multiple Choice Questions for Mechanical Engineering Test: Mechanical Engineering- 11 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Mechanical Engineering- 11 quiz give you a good mix of easy questions and tough questions. Mechanical Engineering students definitely take this Test: Mechanical Engineering- 11 exercise for a better result in the exam. You can find other Test: Mechanical Engineering- 11 extra questions, long questions & short questions for Mechanical Engineering on EduRev as well by searching above.

QUESTION: 1

The forces, which meet at one point and their lines of action also lie on the same plane, are known as

A.
coplaner concurrent forces
B.
coplaner non-concurrent forces
C.
non-coplaner concurrent forces
D.
non- coplaner non- concurrent forces

Solution:

QUESTION: 2

Concurrent forces are those forces whose lines of action

A.
lie on the same line
B.
meet at one point
C.
meet on the same plane
D.
none of these

Solution:

QUESTION: 3

A couple produces

A.
translatory motion
B.
rotational motion
C.
combined translatory and rotational motion
D.
none of the above

Solution:

QUESTION: 4

The maximum frictional force, which comes into play, when a body just begins to slide over the surface of the other body, is known as

A.
limiting friction
B.
dynamic friction
C.
static friction
D.
coefficient of friction

Solution:

QUESTION: 5

Which of the following is the extensive property of a thermodynamic system ?

A.
Pressure
B.
Volume
C.
Temperature
D.
Density

Solution:

QUESTION: 6

According to First law of thermodynamics

A.
total internal energy of a system during a process remains constant
B.
total energy of a system remains constant
C.
workdone by a system is equal to the heat transferred by the system
D.
internal energy, enthalpy and entropy during a process remains constant

Solution:

QUESTION: 7

Second law of thermodynamics defines

A.
heat
B.
work
C.
internal energy
D.
entropy

Solution:

QUESTION: 8

The state of a substance whose evaporation from its liquid state is complete, is known as

A.
vapour
B.
perfect gas
C.
air
D.
steam

Solution:

QUESTION: 9

All perfect gases change in volume by 1/273th of its original volume at 0ºC for every IºCchange in temperature, when the pressure remains constant. This statement is called

A.
Boyle's law
B.
Charles' law
C.
Gay-Lussac law
D.
Joule's law

Solution:

QUESTION: 10

The absolute zero pressure will be

A.
when molecular momentum of the system becomes zero
B.
at sea level
C.
at the temperature of - 273 K
D.
at the centre of the earth

Solution:

QUESTION: 11

Relation between cp and cv is given by

A.
B.
C.
D.
all of these

Solution:

QUESTION: 12

The heat energy stored in the gas and used for raising the temperature of the gas is known as

A.
external energy
B.
internal energy
C.
kinetic energy
D.
molecular energy

Solution:

QUESTION: 13

Workdone in a free expansion process is

A.
zero
B.
minimum
C.
maximum
D.
positive

Solution:

QUESTION: 14

The main cause for the irreversibility is

A.
mechanical and fluid friction
B.
unrestricted expansion
C.
heat transfer with a finite temperature difference
D.
all of the above

Solution:

QUESTION: 15

The isothermal and adiabatic processes are regarded as

A.
reversible process
B.
irreversible process
C.
reversible or irreversible process
D.
none of these

Solution:

QUESTION: 16

The efficiency of the Carnot cycle is

where T₁ and T₂ = Highest and lowest temperature during the cycle.

Solution:

QUESTION: 17

One tonne of refrigeration (1TR) means that the heat removing capacity is

A.
21 kJ/min
B.
210 kJ/min
C.
420 kJ/min
D.
620 kJ/min

Solution:

QUESTION: 18

The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by

Solution:

QUESTION: 19

In aircraft, air refrigeration cycle is used because of

A.
low weight per tonne of refrigeration
B.
high heat transfer rate
C.
low temperature at high altitudes
D.
higher coefficient of performance

Solution:

QUESTION: 20

The leakage in a refrigeration system using freon is detected by

A.
halide torch
B.
sulphur sticks
C.
soap and water
D.
all of these

Solution:

QUESTION: 21

Which of the following refrigerant has the maximum ozone depletion potential in the stratosphere ?

A.
Ammonia
B.
Carbon dioxide
C.
Sulphur dioxide
D.
Flourine

Solution:

QUESTION: 22

In a four stroke engine, the working cycle is completed in

A.
one revolution of the crankshaft
B.
two revolutions of the crankshaft
C.
three revolutions of the crankshaft
D.
four revolutions of the crankshaft

Solution:

QUESTION: 23

In a four stroke cycle petrol engine, the inlet valve

A.
opens at top dead centre and closes at bottom dead centre
B.
opens at 20º before top dead centre and closes at 40º after bottom dead centre
C.
opens at 20º after top dead centre and closes at 20º before bottom dead centre
D.
may open or close anywhere

Solution:

QUESTION: 24

The inlet valve of a four stroke cycle internal combustion engine remains open for

A.
130º
B.
180º
C.
230º
D.
270º

Solution:

QUESTION: 25

A spark plug gap is kept from

A.
0.3 to 0.7 mm
B.
0.2 to 0.8 mm
C.
0.4 to 0.9 mm
D.
0.6 to 1.0 mm

Solution:

QUESTION: 26

The ignition quality of petrol is expressed by

A.
cetane number
B.
octane number
C.
calorific value
D.
all these

Solution:

QUESTION: 27

The two reference fuels used for cetane rating are

A.
cetane and iso-octane
B.
cetane and alpha-methyl naphthalene
C.
cetane and normal heptane
D.
cetane and tetra ethyl lead

Solution:

QUESTION: 28

The basic requirement of a good combustion chamber is

A.
minimum turbulence
B.
low compression ratio
C.
high thermal efficiency and power output
D.
low volumetric efficiency

Solution:

QUESTION: 29

The effective inhibitor of pre-ignition is

A.
alcohol
B.
water
C.
lead
D.
none of these

Solution:

QUESTION: 30

A closed vessel made of steel and used for the generation of steam is called a

A.
steam boiler
B.
steam turbine
C.
steam condenser
D.
steam injector

Solution:

QUESTION: 31

Water tube boilers are

A.
internally fired
B.
externally fired
C.
internally as well as externally fired
D.
none of these

Solution:

QUESTION: 32

The diameter of a cylindrical shall of a Scotch marine boiler varies from

A.
1.5 to 2 m
B.
2.5 to 3.5 m
C.
3.5 to 4.5 m
D.
none of these

Solution:

QUESTION: 33

Locomotive boiler is a

A.
single tube, horizontal, internally fired and stationary boiler
B.
single tube, vertical, externally fired and stationary boiler
C.
multitubular, horizontal, internally fired and mobile boiler
D.
multitubular, horizontal, externally fired and stationary boiler

Solution:

QUESTION: 34

The fittings mounted on the boiler for its proper and safe functioning is a

A.
water level indicator
B.
pressure gauge
C.
safety valve
D.
all of these

Solution:

QUESTION: 35

Which of the following is not a boiler mounting?

A.
Blow off cock
B.
Feed check valve
C.
Economiser
D.
Fusible plug

Solution:

QUESTION: 36

The maximum heat loss is a boiler occurs due to

A.
moisture in fuel
B.
dry flue gases
C.
steam formation
D.
unburnt carbon

Solution:

QUESTION: 37

An air preheater is installed

A.
between the economiser and chimney
B.
before the superheater
C.
before the economiser
D.
none of these

Solution:

QUESTION: 38

The draught may be produced by a

A.
mechanical fan
B.
chimney
C.
a steam jet
D.
all of these

Solution:

QUESTION: 39

The liquid used in manometers should have

A.
low density
B.
high density
C.
high surface tension
D.
low surface tension

Solution:

QUESTION: 40

When a body is placed over a liquid, it will sink down if

A.
gravitational force is equal to the up thrustof the liquid
B.
gravitational force is less than the up thrustof the liquid
C.
gravitational force is more than the up thrustof the liquid
D.
none of the above

Solution:

QUESTION: 41

A flow whose streamline is represented by a curve, is called

A.
one-dimensional flow
B.
two-dimensional flow
C.
three-dimensional flow
D.
four-dimensional flow

Solution:

QUESTION: 42

The divergent portion of a venturimeter is made longer than convergent portion in order

A.
avoid the tendency of breaking away thestream of liquid
B.
to minimise frictional losses
C.
none of these
D.
both (a) and (b)

Solution:

QUESTION: 43

The discharge through a large rectangular orifice is given by

where H₁ = Height of the liquid above the top of the orifice.
H₂ = Height of the liquid above the bottom of the orifice,
b = Breadth of the orifice, and
C_d = Coefficient of discharge

Solution:

QUESTION: 44

The maximum efficiency of transmission through a pipe is

A.
50%
B.
56.7%
C.
66.67%
D.
76.66%

Solution:

QUESTION: 45

Bulk modulus of a fluid is the ratio of

A.
shear stress to shear strain
B.
increase in volume to the viscosity of fluid
C.
increase in pressure to the volumetric strain
D.
critical velocity to the viscosity of fluid

Solution:

QUESTION: 46

The force present in a moving liquid is

A.
inertia force
B.
viscous force
C.
gravity force
D.
all of these

Solution:

QUESTION: 47

Which of the following is a proper sequence ?

A.
proportional limit, elastic limit, yielding,failure
B.
elastic limit, proportional limit, yielding,failure
C.
yielding, proportional limit, elastic limit,failure
D.
none of the above

Solution:

QUESTION: 48

Hook's law holds good up to

A.
yield point
B.
elastic limit
C.
plastic limit
D.
breaking point

Solution:

QUESTION: 49

The maximum stress produced in a bar of tapering section is at

A.
smaller end
B.
larger end
C.
middle
D.
anywhere

Solution:

QUESTION: 50

Shear modulus is the ratio of

A.
linear stress to linear strain
B.
linear stress to lateral strain
C.
volumetric strain to linear strain
D.
shear stress to shear strain

Solution:

QUESTION: 51

When a body is subjected to a direct tensile stress (s_x) in one plane accompanied by a
simple shear stress (t_xy), the maximum normal stress is

Solution:

QUESTION: 52

Strain energy is the

A.
energy stored in a body when strained within elastic limits
B.
energy stored in a body when strained upto the breaking of a specimen
C.
maximum strain energy which can be stored in a body
D.
proof resilience per unit volume of a material

Solution:

QUESTION: 53

The strain energy stored in a spring, when subjected to maximum load, without suffering permanent distortion, is known as

A.
impact energy
B.
proof resilience
C.
proof stress
D.
modulus of resilience

Solution:

QUESTION: 54

A beam encastered at both the ends is called

A.
simply supported beam
B.
cantilever beam
C.
fixed beam
D.
continuous beam

Solution:

QUESTION: 55

The shear force at the centre of a simply supported beam with a gradually varying load from zero at both ends to w per metre at thecentre, is

A.
zero
B.
wl/4
C.
wl/2
D.
wl²/2

Solution:

QUESTION: 56

The bending equation is

Solution:

QUESTION: 57

When a rectangular beam is loaded transversely, the maximum tensile stress is developed on

A.
top layer
B.
bottom layer
C.
neutral axis
D.
every cross-section

Solution:

QUESTION: 58

If the composite shaft in the above question is fixed at one end and the other end is subjected
to a torque, then its equivalent spring constant is

Solution:

QUESTION: 59

The buckling load for a given column depends upon

A.
area of cross-section of the column
B.
length and least radius of gyration of the column
C.
modulus of elasticity for the material of the column
D.
all of the above

Solution:

QUESTION: 60

Euler's formula holds good only for

A.
short columns
B.
long columns
C.
both short and long columns
D.
weak columns

Solution:

QUESTION: 61

The Rankine's formula for columns is

A.
B.
C.
D.
None of the above

Solution:

QUESTION: 62

Fatigue test is carried out for

A.
stresses varying between two limits of equa lvalue, but of opposite sign
B.
stresses varying between two limits of unequal value, but of opposite sign
C.
stresses varying between two limits of unequal value but of same sign
D.
all of the above

Solution:

QUESTION: 63

The point of contraflexure occurs in

A.
cantilever beams
B.
simply supported beams
C.
overhanging beams
D.
fixed beams

Solution:

QUESTION: 64

The motion between a pair when limited to a definite direction, irrespective of the direction of force applied, is known as

A.
completely constrained motion
B.
incompletely constrained motion
C.
successfully constrained motion
D.
none of these

Solution:

QUESTION: 65

Which of the following is an example of a higher pair ?

A.
Toothed gearing
B.
Belt and rope drive
C.
Ball and roller bearing
D.
all of these

Solution:

QUESTION: 66

The relation between number of pairs (p) forming a kinematic chain and the number oflinks (l) is

A.
l = 2p – 2
B.
l = 2p – 3
C.
l = 2p – 4
D.
l = 2p – 5

Solution:

QUESTION: 67

The mechanism forms a structure, when the number of degrees of freedom (n) is equal to

A.
0
B.
1
C.
2
D.
–1

Solution:

QUESTION: 68

Scotch yoke mechanism is used to generate

A.
sine functions
B.
square roots
C.
logarithms
D.
inversions

Solution:

QUESTION: 69

The total number of instantaneous centres for a mechanism of n links are

A.
n/2
B.
n
C.
n-1
D.
n(n-1)/2

Solution:

QUESTION: 70

The instantaneous centre of a rigid thin disc rolling on a plane rigid surface is located at

A.
the centre of the disc
B.
the point of contact
C.
an infinite distance on the plane surface
D.
the point on the circumference situated vertically opposite to the contact point

Solution:

QUESTION: 71

According to India standard specifications, 100 H6/ g5 means that the

A.
actual size is 100 mm
B.
basis size is 100 mm
C.
difference between the actual size and basic size is 100 mm
D.
none of the above

Solution:

QUESTION: 72

The velocity of the belt for maximum power is

Solution:

QUESTION: 73

The included angle for the V-belt is usually

A.
10º to 20º
B.
30º to 40º
C.
20º to 30º
D.
60º to 80º

Solution:

The V-belts are made of fabric and cords moulded in rubber and covered with fabric and rubber. These belts are moulded to a trapezoidal shape and are made endless. These are particularly suitable for short drives. The included angle for the V-belt is usually from 30° to 40°.

QUESTION: 74

Idler pulley is used for

A.
increasing velocity ratio
B.
for applying tension
C.
changing the direction of motion of belt
D.
all of these

Solution:

QUESTION: 75

18/8 steel contains

A.
18% nickel and 8% chromium
B.
18% chromium and 8% nickel
C.
18% nickel and 8% vanadium
D.
18% vanadium and 8% nickel

Solution:

QUESTION: 76

An aluminium member is designed on the basis of

A.
yield stress
B.
elastic limit stress
C.
proof stress
D.
ultimate stress

Solution:

QUESTION: 77

Guest's theory is used for

A.
brittle materials
B.
ductile materials
C.
elastic materials
D.
plastic materials

Solution:

QUESTION: 78

The design sensitivity q is expressed in terms of fatigue stress concentration factor Kf and
theoretical stress concentration factor Kt, as

Solution:

QUESTION: 79

In designing thick cylinders, the equation used is

A.
All of these
B.
Birnie's equation
C.
Clavarinos' equation
D.
Lame's equation

Solution:

QUESTION: 80

The pipe joint mostly used for pipes carrying water at low pressures is

A.
socket joint
B.
nipple joint
C.
union joint
D.
spigot and socket joint

Solution:

QUESTION: 81

Which of the following property is desirable in parts subjected to shock and impact loads ?

A.
Strength
B.
Stiffness
C.
Brittleness
D.
Toughness

Solution:

QUESTION: 82

The carbon in the pig iron varies from

A.
0.1 to 0.5%
B.
0.5 to 1%
C.
1 to 5%
D.
5 to 10%

Solution:

QUESTION: 83

Cast iron is manufactured in

A.
blast furnace
B.
cupola
C.
open hearth furnace
D.
bessemer converter

Solution:

QUESTION: 84

Wrought iron

A.
is a ductile material
B.
can be easily forged or welded
C.
cannot stand sudden and excessive shocks
D.
all of these

Solution:

QUESTION: 85

Nickel when added to copper improves

A.
machinability
B.
hardness
C.
hardness and strength
D.
strength and ductility

Solution:

QUESTION: 86

Babit metal contains

A.
50% tin and 50% antimony
B.
66% tin, 30% copper and 4% antimony
C.
88% tin, 4% copper and 8% antimony
D.
92% tin, 6% copper and 2% antimony

Solution:

QUESTION: 87

In oblique cutting of metals, the cutting edge of the tool is

A.
perpendicular to the worpiece
B.
perpendicular to the direction of tool travel
C.
parallel to the direction of tool travel
D.
inclined at an angle less then 90º to the direction of tool travel

Solution:

QUESTION: 88

Continuous chips with built up edge are formed during machining of

A.
brittle metals
B.
ductile metals
C.
hard metals
D.
soft metals

Solution:

QUESTION: 89

Cast iron during machining produces

A.
continuous chips
B.
discontinuous chips
C.
continuous chips with built-up-edge
D.
none of these

Solution:

QUESTION: 90

If the cutting speed is increased, then the builtup- edge

A.
becomes longer
B.
may or may not form
C.
becomes smaller and finally does not format all
D.
has nothing to do with speed

Solution:

QUESTION: 91

Flank wear occurs mainly on the

A.
face of the cutting tool at a short distance from the cutting edge
B.
nose part, front relief face and side relief face of the cutting tool
C.
cutting edge only
D.
front face only

Solution:

Crater wear occurs on the rake face of the tool, while flank wear occurs on the relief (flank) face of the tool.

QUESTION: 92

The tool life is said to be over if

A.
poor surface finish is obtained
B.
there is sudden increase in cutting forces and power consumption
C.
overheating and fuming due to heat of friction starts
D.
all of the above

Solution:

QUESTION: 93

Lathe bed is made of

A.
mild steel
B.
alloy steel
C.
pig iron
D.
chilled cast iron

Solution:

QUESTION: 94

The chamfering is an essential operation after

A.
knurling
B.
rough turning
C.
boring
D.
thread cutting

Solution:

QUESTION: 95

In a planer

A.
tool is stationary and work reciprocates
B.
work is stationary and tool reciprocates
C.
tool moves over stationary work
D.
tool moves over reciprocating work

Solution:

QUESTION: 96

In centreless grinders, the regulating wheel is inclined at

A.
0º to 8º
B.
9º to 15º
C.
16º to 20º
D.
21º to 25º

Solution:

QUESTION: 97

Broaching is applied for machining

A.
internal and external surfaces
B.
round or irregular shaped holes
C.
external flat and contoured surfaces
D.
all of these

Solution:

QUESTION: 98

In ultra-sonic machining, tool is made of

A.
tungsten carbide
B.
brass or copper
C.
diamond
D.
stainless steel

Solution:

QUESTION: 99

The operation of cutting of a flat sheet to the desired shape is called

A.
shearing
B.
piercing
C.
punching
D.
blanking

Solution:

QUESTION: 100

In shielded arc welding

A.
large electrode is used
B.
welding rod coated with slag is used
C.
welding rod coated with fluxing material is used
D.
none of the above

Solution:

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100 Questions MCQ Test Mechanical Engineering SSC JE (Technical) | Test: Mechanical Engineering- 11

The forces, which meet at one point and their lines of action also lie on the same plane, are known as

Concurrent forces are those forces whose lines of action

A couple produces

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