Mechanical Engineering Quiz # 5

Which type of thread is used in bench vices in manufacturing units?

Acme thread

Buttress thread

Knuckle thread

Square thread

In which, among the following governing methods, is a control valve fitted in the fuel delivery pipe in order to control the quantity of fuel mixed in the charge?

Hit and miss governing

Qualitative governing

Quantitative governing

Combination system of governing

In which among the following wage incentive plans is the worker paid according to the number of units of work produced by him?

Straight piece work system

Halsey plan

Rowan plan

Gantt plan

In which, among the following engine strokes, is the firing of the vaporized fuel carried out?

suction stroke

expansion stroke

exhaust stroke

compression stroke

The process to improve the fatigue resistance in metals by producing compressive stresses in its surface is known as ________.

cold peening

cold bending

cold spinning

cold extrusion

Due to which of the following properties does molding sand adhere to the sides of the molding box?

Permeability

Plasticity

Adhesiveness

Cohesiveness

Calculate the number of joints in a chain if the number of links is 5.

3.5

4.5

5.5

6.5

Calculate the strain in a material whose original length before undergoing strain is 10 centimeters and the length after undergoing strain is 100 centimeters.

9

110

90

0.1

In which, among the following scavenging methods, are the inlet and the outlet ports situated on the same side of the engine cylinder?

Loop scavenging method

Uniflow scavenging method

Crossflow scavenging method

The resultant of two forces A and B is Q. If A is doubled and the new resultant is perpendicular to A, then:

A=B

A=Q

A=2Q

B/2=Q

Calculate the mechanical efficiency of an engine whose brake power is 20 watts and indicated power is 40 watts.

40%

50%

60%

70%

___________ is an opening through the cope.

Gate

Riser

Core

Refractory

If the motion between a pair takes place in more than one direction, then this kind of motion is termed as ___________.

completely constrained motion

incompletely constrained motion

successfully constrained motion

The work measurement technique is concerned with:

the time during which maximum production is done.

the time during which no production is done.

the processes to simplify the production work.

the development of economical methods of carrying out production work.

What is the value of universal gas constant in SI units?

8.314 joules per kilogram mole kelvin

83.14 joules per kilogram mole kelvin

831.4 joules per kilogram mole kelvin

8314 joules per kilogram mole kelvin

A process in which gas is heated such that the product of its pressure and volume remains constant is known as

isochoric process

isobaric process

isothermal process

hyperbolic process

Which type of welding is obtained if there is an excess of acetylene?

Neutral flame

Oxidizing flame

Reducing flame

In a simple harmonic motion, number of cycles produced per second is known as:

velocity.

acceleration.

frequency.

amplitude.

periodic time.

Calculate the frictional power of an engine if the indicated power is 10 watts and the brake power is 5 watts.

5 watts

2 watts

0.5 watts

15 watts

The allowance provided on patterns which are used for castings in which contraction is not uniform is known as _________.

shaking allowance

camber allowance

machining allowance

contraction allowance

draft allowance

If we have to choose a grinding wheel having the least hardness, which grade of grinding wheel should be chosen?

Grade A to H

Grade I to P

Grade I to P

Calculate the torque for a solid shaft having a radius of 10 millimeters and torsional shear stress of 112 newtons per square millimeter.

175000 newton millimeters

175840 newton millimeters

174840 newton millimeters

176800 newton millimeters

_____________ is the operation of enlarging a previously drilled hole.

Reaming

Tapping

Boring

Lapping

Two springs having stiffness 5 and 10 respectively are connected in series. Calculate the combined stiffness of the two springs.

20/3

30/4

10/3

15/2

What is the value of entropy of a substance at absolute zero temperature?

0

1

∞

-1

If M - bending moment, I - moment of inertia, E - young's modulus of elasticity and R - radius of curvature then, which of the following is the correct bending equation for a beam?

M/I = R/E

M/I = R/E

M/I = E/R

The milling operation of producing surfaces of irregular shape is known as:

Plain milling

Side milling

End milling

Form milling

Gang milling

What effect does the grain size of a cutting tool have on the tool life?

Tool life increases

Tool life decreases

Grain size has no effect on tool life

Within which angular range is the shear stress maximum if a body is subjected to tensile stress in one plane?

45º and 135º

50º and 175º

40º and 130º

55º and 180º

_______________ is a beam having its end portion extended beyond the support.

Cantilever beam

Simply supported beam

Overhanging beam

Continuous beam