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READINGS MD 2.1

Total questions: 95

Worksheet time: 48mins

Name
Class
Date
1.

______ is the theoretical profile of the thread for a length of one pitch in the axial plane on which the design forms of both the external threads are based.

a)

basic form of thread

b)

effective thread

c)

basic profile of thread

d)

design form of external thread

2.

A tool not belonging to the group:

a)

hermaphrodite caliper

b)

divider

c)

double VEE block

d)

trammel

3.

The maximum stress induced in a material when subjected to intermittent or repeated load without causing failure is called:

a)

ultimate stress

b)

endurance limit

c)

ultimate torque

d)

elastic limit

4.

The factor of safety generally applied in wire rope design starts at 3-4 for standing rope application, 5-12 for operating rope and ______ for hazard to life and property application like foundry operation.

a)

higher values

b)

7-10

c)

8-10

d)

10-18

5.

Silicon manganese steel designation, SAE_____.

a)

72xx

b)

40xx

c)

92xx

d)

9xx

6.

The recommended age limit of fire tube boilers.

a)

35 years

b)

30 years

c)

40 years

d)

50 years

7.

In machine shop, hand forging operation of lengthening a piece of stock while reducing the cross-sectional area of work is called:

a)

bloating

b)

upsetting

c)

spreading

d)

draining out

8.

A watt is equivalent to:

a)

42.4 Btu/min

b)

1 N-m/sec

c)

44.20 ft-lb/min

d)

all of these

9.

Which of the following services is not considered to be work of machinist?

a)

reboring

b)

grinding

c)

overhauling

d)

honing

10.

Cold drawing is also called:

a)

hard drawn

b)

cold lap steel

c)

strain hardening

d)

oxidized steel

11.

The top and bottom for gears is similar formed as to crest and _____ for screw thread.

a)

flank

b)

root

c)

flank of tooth

d)

top land

12.

Intermediate gear is also called _____ gear in a gear train arrangement.

a)

idler

b)

pinion

c)

third gear

d)

mounted gear

13.

The brittleness in steel at elevated temperature is _____.

a)

hard drawn

b)

cold lap

c)

red shortness

d)

residual stresses

14.

Material may be stretched and still returns to its form or condition upon the release of force is called _____.

a)

plasticity

b)

modulus of elasticity

c)

ductility

d)

elastic limit

15.

Type of chuck wherein the work piece with standard diameter or size could be attached fast and quick, especially small-size work of mass production.

a)

lathe drive plate

b)

clamp toe dog

c)

collet attachment

d)

steady center rest

16.

Moment curve for a simple beam with a concentrated load at middle span takes the shape of a:

a)

triangle

b)

rectangular

c)

trapezoid

d)

semi-eclipse

17.

This particular cutting tool material could withstand cutting temperatures of 1800°F and higher at cutting speed beyond those possible with other cutting tool materials.

a)

titanium carbide

b)

ceramic

c)

carbide grade

d)

cubic boron nitride

18.

Common defects encountered in the foundry shop steel casting operating and also in welding practices.

a)

cracks

b)

cold shot

c)

parting line

d)

blow/pin holes

19.

Some experiments made at Cornell University showed that experience mechanic could break a ____ bolt due to nut tightening.

a)

3/8 inch

b)

5/8 inch

c)

1/2 inch

d)

7/16 inch

20.

The 3 most commonly used cam and follower system are radial and offset translating roller follower and ______ roller follower.

a)

reversing

b)

pulsating

c)

swinging

d)

actuating

21.

Type of carbon and alloy used in production of precision work tools.

a)

chrome-manganese

b)

titanium

c)

high speed

d)

chrome-molybdenum

22.

Recommended hardness of pinion for helical/herringbone gear tooth should be ___ BHN point to sustain life.

a)

50 - 59

b)

48 - 65

c)

40 - 50

d)

30 - 60

23.

Fast process of analyzing all elements and chemical components of steel casting.

a)

pyrometer

b)

carbon analyzer

c)

wet analyzer

d)

spectrometer

24.

In small quantity this alloy is effective for improvement strength at high temperature.

a)

chromium

b)

manganese

c)

selenium

d)

molybdenum

25.

Which of the following is not a kind of mandrel?

a)

expanded

b)

extended

c)

contraction

d)

taper

26.

The arc of action to circular pitch or length of action to base pitch.

a)

approach ratio

b)

contact ratio

c)

arc of action

d)

arc of approach

27.

A cutting tool angle between the side cutting edge and the plane perpendicular to direction of feed travel is _____ angle.

a)

side relief

b)

side cutting edge

c)

lead

d)

side rake

28.

The surface between the pitch circle and bottom land.

a)

line of action

b)

flank of tooth

c)

bottom land

d)

face of top land

29.

A section in a machine shop operation.

a)

core making

b)

machining

c)

fitting

d)

pattern

30.

Test showed that steel pulleys has less slippage than of cast iron pulleys in range of:

a)

1.8 - 2.6

b)

1.8 - 2.8

c)

2.35 - 2.7

d)

2.0 - 2.8

31.

The bottom surface joining two sides of thread in screw.

a)

pitch

b)

crest

c)

bottom land

d)

root

32.

Shear modulus is also:

a)

shear elasticity

b)

poison’s ratio

c)

modulus of elasticity

d)

modulus of rigidity

33.

To prevent leakage in dynamic seal.

a)

gaskets

b)

seals

c)

packings

d)

felts

34.

Top surface joining two sides of thread in screw.

a)

pitch

b)

top flank

c)

top land

d)

crest

35.

The frictional forces depend on coefficient of friction and

a)

torque

b)

weights of object

c)

normal force

d)

moment

36.

The number of cycles required to cause failure for given stream level.

a)

endurance

b)

fatigue

c)

fatigue life

d)

rupture

37.

The tool bit made of tool blank consist of face, nose, shank and ______.

a)

cutting edge

b)

none of these

c)

round nose

d)

base

38.

The cutting tool used the shaper are similar to turning tools of ____ machine.

a)

planer

b)

broaching

c)

boring

d)

lathe

39.

The blades for hacksaw have number of teeth range of:

a)

15 - 38 tooth/in

b)

14 - 32 teeth/in

c)

12 - 30 teeth/in

d)

12 - 32 teeth/in

40.

The safeguard in minimum of ______ mm in height for the use as toe guard/toe board.

a)

165

b)

135

c)

150

d)

120

41.

Not part of the headstock.

a)

back gear

b)

spindle

c)

anvil

d)

motor

42.

A lathe carriage part that bridge across the bed to carry the cross slide and tool rest.

a)

automatic feed

b)

apron

c)

compound rest

d)

saddle

43.

Screw thread projecting from a cylindrical surface.

a)

thread series

b)

thread shear area

c)

straight thread

d)

taper thread

44.

Vertex distance is a term used in ______ gearing.

a)

spiral

b)

worm

c)

bevel

d)

zerol

45.

The modulus of elasticity of steel E is at 30×10630 \times 10^6 psi, iron at 10×10610 \times 10^6 psi, but concrete is much lower at ______ ×106\times 10^6 psi.

a)

11

b)

22

c)

66

d)

33

46.

Two more forces acting together could be placed by a single force with same effect in a mass.

a)

couple of force

b)

resolution of forces

c)

resultant

d)

concurrent of forces

47.

What is the recommended cutting speed range for bronze in fpm?

a)

60/70

b)

200/250

c)

80/60

d)

100/110

48.

The resultant of two or more forces is also called:

a)

equilibrium

b)

momentum

c)

concurrent forces

d)

resolution of forces

49.

Type of leather belt being applied with waterproof cement.

a)

combination of oak/mineral tanned

b)

all of these

c)

oak tanned

d)

mineral tanned

50.

Cam in general may be divided into two classes: uniform motion cam and _____ motion cam.

a)

reverse

b)

gravity

c)

decelerated

d)

accelerated

51.

For ordinary turning, drilling and milling on low strength steel the cutting fluid applied have soluble oil with consistency of 1-part oil to _____ parts water.

a)

10 to 30

b)

10

c)

5 to 10

d)

10 to 20

52.

It is associated with nickel steel.

a)

magnesium

b)

lead

c)

columbium

d)

tin

53.

Often called necking or grooving in the cutting of a groove next to a shoulder on a piece of work is called in a machine shop practice.

a)

chamfering square

b)

undercutting

c)

corner

d)

edge cutting

54.

To prevent engine vibration to affect the surrounding area, it is a standard practice to isolate the engine and its foundation by at least _____ mm.

a)

30 mm

b)

20 mm

c)

25 mm

d)

36 mm

55.

It is the drill backbone which run the entire length of the drill between plates and sides rigidity to the entire drill.

a)

drill shaft

b)

shank

c)

tang

d)

web

56.

Grout material use under the machine bed and foundation surface should be:

a)

1-part cement & 1/2-part green sand & 1/4-part of gypsum

b)

1-part cement & 1-part green sand

c)

1-part cement & 1-part screened sand & 1/4-part gypsum

d)

1-part cement & 1 1/2-part screened sand & 1/2-part stone

57.

The acceleration of the point of contact is:

a)

rv2rv^2

b)

rw2rw^2

c)

v2/rv^2/r

d)

w2/vw^2/v

58.

The recommended lubricant for the chain drive operation.

a)

SAE 4140

b)

Petroleum oil

c)

moly slip

d)

heavy grease

59.

In the SAE identification code of steel shafting, the 3rd and 4th digits represent the content of:

a)

% of manganese in the steel

b)

% of alloy elements

c)

% of carbon contents

d)

% of chromium in the steel

60.

The minimum recommended worm pitch diameter is 1/41/4 in. and the maximum is _____ in.

a)

1 3/4 in.

b)

2 3/4 in

c)

3 in.

d)

2 in.

61.

At a given section of an I beam the maximum bending stress occurs at the ______.

a)

maximum shear stress area

b)

neutral axis

c)

web joint near the flange

d)

outer most fiber

62.

What is 25%25\% of 1/21/2 ?

a)

12 1/2

b)

12.5

c)

1/81/8

d)

1/41/4

63.

The process of increasing the carbon content to the surface of steel by exposing it to hot carbonaceous material above the transformation of 1650 to 1750 °F.

a)

carbonitriding

b)

casehardening

c)

carburizing

d)

induction hardening

64.

What is the lightest known metal?

a)

mercury

b)

steel

c)

chromium

d)

aluminum

65.

Designated pipe color used in electricity.

a)

light blue

b)

light orange

c)

green

d)

white

66.

What is the value in degrees of 1 radian?

a)

57.49∘57.49^\circ

b)

57.94∘57.94^\circ

c)

57.29∘57.29^\circ

d)

57.92∘57.92^\circ

67.

What is the equivalent value of 1083°C in °F?

a)

1198

b)

1981

c)

1918

d)

1891

68.

The catwalk standard required for cleaning an engine can be found in any power plant or power generating unit.

a)

24 in

b)

22 in

c)

23 in

d)

25 in

69.

It is ideal for maximum quietness in sprocket drive operation to choose ________ or more teeth.

a)

25

b)

26

c)

27

d)

28

70.

Consider a maximum safe center distance of sprockets should be ______ pitches. Very long center distance caused catenary tension in the chain.

a)

70

b)

80

c)

90

d)

100

71.

Extra flexible hoisting rope applications is ________.

a)

6 × 17

b)

6 × 37

c)

6 × 9

d)

6 × 21

72.

Deals only with the motion of bodies without reference to the forces that cause them.

a)

kinetics

b)

motion

c)

Kinematics

d)

acceleration

73.

Tooth width measurement along the chord at the pitch circle.

a)

chord space

b)

chord clearance

c)

chordal thickness

d)

chordal length

74.

The rule of thumb in journal bearing design, the clearance ratio/clearance should be:

a)

0.1001

b)

0.0101

c)

0.0110

d)

0.0010

75.

A shaft that is used to connect or disconnect at will is called ________.

a)

clutch

b)

bearing

c)

brake shaft

d)

lock shaft

76.

It is recommended for high speed application that the minimum number of teeth in small sprocket should be ________.

a)

12 to 20

b)

18 to 24

c)

16 to 32

d)

14 to 28

77.

Material having a high electrical resistance and should not be used as conductor of electrical current

a)

magnesium

b)

copper

c)

nickel

d)

iron

78.

Torsional deflection is a significant consideration in the design of shaft and the limit should be in the range of degrees/foot of length.

a)

0.004 to 0.006

b)

0.08 to 1

c)

0.006 to 0.008

d)

0.008 to 1

79.

The property that characterizes a material’s ability to be drawn into a wire.

a)

plasticity

b)

elasticity

c)

ductility

d)

utility

80.

The distance from a point on a screw thread to a corresponding point on the next measured along the axis.

a)

radial

b)

module

c)

thickness

d)

pitch

81.

Compute the cutting speed in fpm of a workpiece with 2 inches diameter and running at 100 rpm.

a)

52

b)

62

c)

25

d)

26

82.

A body weighing 1000 lbs falls and strikes a 2000 lb/in spring. The deformation of the spring is.

a)

2

b)

4

c)

3

d)

5

83.

To be responsible charge for the preparation of plans, designs, investigations, valuation, technical reports, specifications, project studies or estimates, he must be a.

a)

ME

b)

CPM

c)

PME

d)

CPM, ME & PME

84.

In pure torsion, the maximum torsional stress occurs at the center of the

a)

center

b)

Long sides

c)

medium sides

d)

short sides

85.

The modulus of elasticity for ordinary steel usually falls between ______ million pounds per square inch.

a)

28 to 31

b)

20 - 45

c)

26 to 28

d)

50 - 30

86.

The modulus of elasticity is a measure of ______.

a)

accuracy

b)

quality

c)

stiffness

d)

rigidity

87.

The modulus of elasticity for most metals in compression is usually taken as that in _____.

a)

tension

b)

bearing

c)

torsion

d)

yield

88.

The ratio of Moment and stress.

a)

strain

b)

Contraction

c)

proportional constant

d)

section modulus

89.

For a symmetrical cross-section beam, the flexural stress is _____ when the vertical shear is maximum.

a)

infinity

b)

maximum

c)

zero

d)

minimum

90.

When tested in compression, ductile materials usually exhibit _____ characteristics up to the yield strength as they do when tested in tension.

a)

the same

b)

less than

c)

more than

d)

approximately the same

91.

As one example, the ASME Code for riveted joints permits the design surface compressive stress to be about _____ higher than the design tensile stress.

a)

50%

b)

40%

c)

60%

d)

70%

92.

In a pressure vessel, the ratio of minimum strength of joint to the strength of solid joint is known as

a)

efficiency

b)

Performance factor

c)

joint efficiency

d)

relative strength

93.

In a pressure vessel, the usual factor of safety may be taken as

a)

2

b)

4

c)

3

d)

5

94.

Is the permissible variation of the size of a dimension

a)

tolerance

b)

fits

c)

limits

d)

none of these

95.

If there is no fit, a liberal tolerance of the order of _____ in machining work could be permitted.

a)

±0.020

b)

±0.010

c)

±0.09

d)

±0.05