OVERSEER/DRAFTSMAN(MECH.)GR.III/TRACER answer key

Question 1

Newton is the SI unit of

A

Pressure

B

Force

C

Energy

D

Velocity

Question 2

The product of force and perpendicular distance from axis of rotation is known as

A

Load arm

B

Effort arm

C

Moment

D

Inertia

Question 3

Which of the following is a Scalar quantity ?

A

Speed

B

Force

C

Velocity

D

Momentum

Question 4

Which of the following is an example for Third order lever ?

A

Wheel barrow

B

Scissors

C

Lemon squeezer

D

Tweezers

Question 5

The ratio of shear stress to shear strain is known as

A

Bulk modulus

B

Young’s modulus

C

Rigidity modulus

D

Torsion

Question 6

The rate of doing work is known as

A

Energy

B

Power

C

Work done

D

Force

Question 7

Water in an overhead tank possesses

A

Kinetic energy

B

Potential energy

C

Strain energy

D

All of the above

Question 8

The ratio of lateral strain to linear strain is known as

A

Poisson’s ratio

B

Torque

C

Moment of inertia

D

Bulk Modulus

Question 9

Which of the following is the unit of power ?

A

J/Sec

B

Watt

C

Horse power

D

All of the above

Question 10

In which of the following lever, fulcrum is in between load and effort ?

A

First order

B

Second order

C

Third order

D

All of the above

Question 11

Momentum is the product of mass and

A

Force

B

Acceleration

C

Velocity

D

Stress

Question 12

Which of the following has no unit ?

A

Stress

B

Strain

C

Mass

D

Moment

Question 13

The ratio of frictional force to normal reaction is known as

A

Coefficient of friction

B

Angle of friction

C

Moment of inertia

D

Mechanical advantage

Question 14

The ratio of Ultimate stress to working stress is known as

A

Poisson’s ratio

B

Factor of safety

C

Young’s modulus

D

Breaking load

Question 15

According to which law “Within elastic limit stress is directly proportional to strain” ?

A

Newton’s law

B

Joules law

C

Hooke’s law

D

Charles law

Question 16

When a tensile force applied on a body of length ‘L’, Area of cross-section ‘A’ and Young’s modulus ‘E’. Then change in length, I =

A

PL × AE

B

PL/AE

C

PLE/A

D

AE/PL

Question 17

What is the kinetic energy of a body of mass 50 kg moving with a velocity 80 m/s ?

A

320 KJ

B

128 KJ

C

160 KJ

D

160 J

Question 18

Which of the following have same SI unit ?

A

Velocity and Force

B

Mass and Density

C

Energy and Power

D

Energy and Work done

Question 19

A spherical ball which is at rest on a horizontal flat surface is an example for

A

Stable equilibrium

B

Unstable equilibrium

C

Neutral equilibrium

D

All of the above

Question 20

Friction can be reduced by

A

Smoothening of contacting surfaces

B

Applying lubricant in between contact surfaces

C

Introducing material of low coefficient of friction

D

All of the above

Question 21

In a machine drawing hatching lines are generally drawn at an angle

A

35°

B

45°

C

55°

D

65°

Question 22

In Triple start thread, Lead =

A

1/3 × Pitch

B

3 × Pitch

C

Pitch

D

2 × Pitch

Question 23

Diameter of Rivet means

A

Shank diameter

B

Head diameter

C

Tail diameter

D

All of the above

Question 24

A welded joint is an example for

A

Temporary joint

B

Permanent joint

C

Semi-permanent joint

D

Screwed joint

Question 25

Which of the following is an example for Anti friction bearing ?

A

Bush bearing

B

Foot step bearing

C

Ball bearing

D

All of the above

Question 26

The component which is a metallic piece of wedge inserted between a shaft and hub, parallel to the axis of shaft is known as

A

Key

B

Coupling

C

Bush

D

Rivet

Question 27

The difference between upper limit of size and lower limit of size is known as

A

Basic size

B

Tolerance

C

Actual size

D

Clearance

Question 28

The angle of Acme thread is

A

60°

B

45°

C

55°

D

29°

Question 29

In a riveted joint if “d” is the diameter of rivet and “t” is the thickness of plate. Then according to Unwins formula d =

A

3t

B

6 / √t

C

6√t

D

t

Question 30

Which of the following key is in the form of a segment of a circular disc ?

A

Gib head key

B

Woodruff key

C

Taper key

D

All of the above

Question 31

Which of the following component is used to connect shafts ?

A

Bearing

B

Coupling

C

Pulley

D

Rivet

Question 32

A Bolt is designated as M12. This means

A

Length 12 mm

B

Minor diameter 12 mm

C

Major diameter 12 mm

D

Pitch 12 mm

Question 33

In a riveted joint, the distance between two adjacent rivets in the same row measured in the gauge line is known as

A

Transverse pitch

B

Diagonal pitch

C

Marginal distance

D

Longitudinal pitch

Question 34

Which of the following component has threads on both ends ?

A

Stud

B

Bolt

C

Key

D

Rivet

Question 35

Which of the following is a type of Rivet head ?

A

Snap head

B

Pan head

C

Countersunk head

D

All of the above

Question 36

The steam engine comes under the category of

A

Internal combustion engine

B

External combustion engine

C

Turbine

D

Compressor

Question 37

In an Otto engine, the combustion occur at

A

Constant pressure

B

Constant temperature

C

Constant volume

D

Constant heat

Question 38

In a four stroke IC engine, the number of stroke covered for one revolution of crank shaft is

A

4

B

2

C

1

D

0.5

Question 39

The hand priming pump is used in an engine, when the engine is

A

at idling speed

B

at full load

C

at full speed

D

at rest

Question 40

If the thermostat valve is stuck in closed position, what will be the result ?

A

Engine gets over heat

B

Engine gets over cooled

C

Engine does not start

D

Engine does not stop

Question 41

What is the instrument used to check the valve tappet clearance of IC engine ?

A

Pitch gauge

B

Feeler gauge

C

Radius gauge

D

All of the above

Question 42

What is the purpose of dip stick used in an engine ?

A

To check the oil density

B

To check the oil temperature

C

To check the oil pressure

D

To check the oil level

Question 43

What is the equation for Frictional Horse Power (FHP) ?

A

IHP – BHP

B

IHP + BHP

C

IHP/BHP

D

IHP × BHP

Question 44

Which of the following quality determine burning property of diesel fuel ?

A

Viscosity

B

Volume

C

Octane number

D

Cetane number

Question 45

The clearance volume is 10 cc and the swept volume is 90 cc, what is the compression ratio ?

A

8 : 1

B

9 : 1

C

10 : 1

D

11 : 1

Question 46

Ignition advance is expressed in terms of

A

Crank angle

B

Millimetres of piston travel before TDC

C

Time in milli seconds

D

All of the above

Question 47

The escape of burnt gases from the combustion chamber past of the piston into the crankcase is called

A

Gas loss

B

Blow by

C

Bypass

D

Passed gas

Question 48

In two stroke engine, what replaces the valves of the four stroke engine ?

A

Fines

B

Ports

C

Notches

D

Tubes

Question 49

The fuel is injected into the cylinder in diesel engine, when the piston is

A

Exactly at TDC after compression stroke

B

Exactly at BDC before compression stroke

C

Approaching to TDC during compression stroke

D

Approaching to TDC during exhaust stroke

Question 50

A square type engine

A

has geometrically square shape

B

has two vertical and horizontal cylinders

C

has square cylinders

D

has cylinder bore equal to stroke length

Question 51

The maximum velocity in a circular pipe when the flow is laminar occurs at

A

the top of the pipe

B

the bottom of the pipe

C

the center of the pipe

D

same in all direction

Question 52

Due to which of the following phenomena water hammer is caused ?

A

Sudden closure of valve in a pipe line

B

Sudden opening of valve in a pipe line

C

In-compressibility of fluid

D

The material of the pipe line

Question 53

The venturimeter is used for measuring

A

Pressure

B

Flow rate

C

Total energy

D

Total head

Question 54

The phenomenon by which a liquid rises into a thin glass tube above or below its normal level

A

Capillarity

B

Surface Tension

C

Cohesion

D

Adhesion

Question 55

The viscosity of a liquid __________ with increase in temperature.

A

increases

B

decreases

C

first decreases then increases

D

first increases then decreases

Question 56

Surface Tension is expressed in terms of

A

N/m

B

N^2/m

C

N/m^2

D

N/m^3

Question 57

The channel without any cover at the top is known as

A

Natural channel

B

Open channel

C

Artificial channel

D

None of the above

Question 58

Force per unit area is called

A

Pressure

B

Strain

C

Surface Tension

D

None of the above

Question 59

Pressure _______ as the depth of the liquid increases.

A

Increases

B

Decreases

C

Remains unchange

D

None of the above

Question 60

Bourdon tube pressure gauge is used to measure ____________ pressure.

A

Low

B

High

C

High as well as low

D

Static

Question 61

While starting the centrifugal pump, delivery valve is kept

A

Fully closed

B

Fully open

C

Half open

D

Any position

Question 62

In a centrifugal pump, the sum of suction head and the delivery head is known as

A

Manometric head

B

Total head

C

Static head

D

Tank head

Question 63

In a reciprocating pump, the air vessels are used for which of the following purpose ?

A

To get continuous supply of liquid at a uniform rate

B

To save the power required to drive the pump

C

To run the pump at a much higher speed without any danger of separation

D

All of the above

Question 64

Hydraulic turbines are classified based on

A

Energy available at inlet of the turbine

B

Direction of flow through vanes

C

Head at inlet of the turbine

D

All of the above

Question 65

The hydraulic coupling belongs to the category of

A

Energy absorbing machine

B

Energy generating machine

C

Energy transfer machine

D

Power absorbing machine

Question 66

A plane figure bounded by seven equal sides is called

A

Hexagon

B

Heptagon

C

Octagon

D

Pentagon

Question 67

Out of the following which instrument is commonly used to draw parallel lines ?

A

Scale

B

T-scale

C

Set-squares

D

Protractor

Question 68

Portion of a circle, which is bounded by two radii and part of the circumference is called

A

Sector

B

Semi-circle

C

Segment

D

Ellipse

Question 69

Name of the triangle, in which three sides and three angles are different.

A

Isosceles triangle

B

Right angled triangle

C

Equilateral triangle

D

Scalene triangle

Question 70

The number of faces for an Octagonal Prism is

A

11

B

9

C

10

D

8

Question 71

Name of the plane figure which has equal sides but angles are not equal to 90 degree.

A

Rhomboid

B

Square

C

Parallelogram

D

Rhombus

Question 72

A right circular cone has __________ number of vertices.

A

One

B

Three

C

Two

D

Zero

Question 73

A line segment joining any two points on the circle is called

A

Radius

B

Chord

C

Arc

D

Diameter

Question 74

Which of the following plane figure have diagonals are equal and bisect each other not at right angle ?

A

Rhombus

B

Parallelogram

C

Trapezium

D

Rectangle

Question 75

The included (interior) angle of a regular pentagon is ________ degree.

A

120

B

108

C

90

D

135

Question 76

A straight line can easily be divided into any number of equal parts by using

A

Protractor and set square

B

Scale and set square

C

Divider and set square

D

T-square

Question 77

Name of the geometrical solid developed by a rectangle rotates about one of its side is

A

Cylinder

B

Cone

C

Sphere

D

Cuboid

Question 78

A regular hexagon contains 6 number of __________ triangles in it.

A

Scalene

B

Isosceles

C

Right angled

D

Equilateral

Question 79

Two lines that makes an angle are called

A

Segment

B

Rays

C

Apex

D

Vertex

Question 80

Number of circles drawn within a circle, but different centers are called

A

Concentric circle

B

Loop of circle

C

Eccentric circle

D

Inscribed circle

Question 81

When a cylinder is cut by a section plane parallel to the axis, the true shape of the section is

A

Rectangle

B

Ellipse

C

Circle

D

Parabola

Question 82

In a regular polygon, the interior angle is 90 degree greater than exterior angle. The number of sides of the polygon is

A

5

B

10

C

7

D

8

Question 83

Out of the following which solid have four similar faces of equilateral triangles

A

Hexahedron

B

Tetrahedron

C

Octahedron

D

Decahedron

Question 84

A solid generated by the revolution of a right angled triangle about one of its perpendicular side is

A

Cone

B

Sphere

C

Pyramid

D

Cylinder

Question 85

When the section plane is inclined to the axis and cut all the generators of a cone, the section obtained is

A

Hyperbola

B

Parabola

C

Ellipse

D

Circle

Question 86

Area of the largest triangle that can cut from a rectangle of length “l” and breadth “b” is

A

lb/3

B

lb/2

C

lb/ 3 √

D

lb/4

Question 87

Perimeter of a rectangular ground is 240 meter and ratio of length to breadth is 5 : 3, length of the ground is

A

75 meter

B

40 meter

C

45 meter

D

80 meter

Question 88

If radius of a sphere is doubled, then its volume will increase _________ times.

A

2

B

3

C

4

D

8

Question 89

What is the height of a tank of 2000 liter capacity having length 2 meter and breadth 1 meter ?

A

2 meter

B

0.5 meter

C

1 meter

D

0.25 meter

Question 90

What will be the area of circular ring of outer diameter 10 centimeter and thickness 10 millimeter ?

A

59.66

B

28.26

C

128.74

D

108.26

Question 91

Total surface area of a Hemisphere of radius “r” can be find out by the equation

A

2πr^2

B

4πr^2

C

2πr

D

3πr^2

Question 92

Area of a square is 100 sq.cm, what will be the area of the square of its diagonal ?

A

200 sq.cm

B

141 sq.cm

C

173 sq.cm

D

50 sq.cm

Question 93

In a cylinder, the radius is doubled and the height is halved, then its volume will be

A

Halved

B

Same

C

Double

D

Four times

Question 94

What is the length of hypotenuse of a right angled triangle with sides 6 cm and 8 cm ?

A

5 cm

B

12 cm

C

16 cm

D

10 cm

Question 95

The diameter of two cones are equal and their curved surface area are in the ratio of 4 : 7. The ratio of their slant heights are

A

7 : 4

B

4 : 7

C

4 : 3

D

3 : 4

Question 96

Total surface area of a cube of side “a” is

A

6a^2

B

4a^2

C

a^3

D

6a^3

Question 97

The volume of sphere of radius “r” is

A

1/3 πr^3

B

2/3 πr^3

C

4/3 πr^3

D

4πr^2

Question 98

Liter is the unit of cubic capacity, the capacity of a tank of length, breadth and height are one foot is ___________ liter.

A

6.28

B

28.317

C

30.5

D

35.315

Question 99

What will be the radius of the largest circle that can be drawn in a triangle of area 100 sq.cm and perimeter 50 cm ?

A

2 cm

B

3 cm

C

4 cm

D

0.5 cm

Question 100

Curved surface area of a cylinder of radius “r” and height “h” is

A

2πrh

B

πrh

C

2πr(r + h)

D

2πr^2h

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