Elements_03

50問 • 1年前

Jacky Shane Luyas Buhia

通報

問題一覧

A heavy rotating body which serves as a reservoir for absorbing and redistributing kinetic energy.

C. Flywheel

Which of the following is not the use of spring?

B. Measure the thickness

The ratio of mean diameter of coil over the coil diameter is known as ________.

C. Spring index

The overall length of the spring when it is compressed until all adjacent coils touched.

D. Solid length

The length of coil spring under no load is known as ________.

B. Free length

In general, steel springs are made of relatively high carbon steel usually ________.

D. more than 0.5 %

When heat-treated wire is coiled cold it should be stress relieved for bending stresses after cooling by being heated at some _______.

B. 500°F

A low cost spring material, suitable where service is not severe and dimensional precision is not needed.

A. Hard drawn wire spring

A hard drawn also 80% reduction but it is made of high-grade steel

B. Music wire

A spring wire with good quality for impact loads and moderately high temperature is known as ________.

A. Chromium silicon

A type of coil where the helical coil is wrapped into a circle foming an annular ring.

D. Garter spring

A type of spring where thin fat strip wound up on itself as a plane spiral, usually anchored at the inside.

C. Motor spring

A type of spring made in the form of a dished washed

A. Belleville spring

In laminated spring the strips are provided in different lengths for _______.

A. economy

An elastic stored energy machine element that when released, will recover its basic form.

D. Spring

When a spring is made of ductile material the curvature factor would be ________.

C. unity

The solid length plus the clearance plus the maximum deflection is called _________.

B. Free length

The majority of coils springs are made of coil tempered carbon steel wire containing carbon.

D. 0.60 to 0.70

Experimental results indicate that the actual frequency of the spring is from ______.

B. 10 to 15 %

According to W.M. Griffith the critical frequency of the spring should behold at least _________ times the frequency of application of a periodic load.

D. 20

The actual number of coil is _________ in a squared and ground ends.

B. n + 2

The solid length of squared ends is ______.

A. (n + 3)d

The free length of ground ends is ________.

D. np

The shortest length for the spring during normal operation is known as __________.

C. Operating length

The relationship between the force exerted by a spring and its deflection is called _______.

C. spring rate

The ratio of the mean diameter of the spring to the wire diameter is called __________.

C. spring index

Refers to the axial distance from a point on one coil to the corresponding point on the next adjacent coil.

B. Pitch

The spring index for general industrial uses should be ________.

D. 8 to 10

The spring index of valve and clutch is ________.

B. 5

Refers to the space between adjacent coils when the spring is compressed to its operating length.

B. Coil clearance

The most practical spring designs produce a pitch angle is less than _________.

A. 12°

Engine valves get shut by means of _________.

D. valve spring

Which of the following material to be used for leaf and coil springs?

D. AISI 4063

The length of a coil spring times the effective number of coil is called _______.

A. active length

For springs subjected to light service, the factor of safety of _______ is suggested.

A. 1.5

Refers to a flat or curved made of thin superimposed plates and forming a cantilever or beam of uniform strength.

D. Laminated spring

Cross wire grooves are types which __________.

A. absorb shocks because of road unevenness

The ___________ of parallel connection of spring is always constant.

A. elongation

Speedometer drive is generally taken from ________.

C. front wheel

The device for smoothing out the power impulses from the engine is known as ______.

C. flywheel

Typical hub length falls between _________.

B. 1.25D to 2.4 D

The recommended coefficient of fluctuation of flywheels for punching, shearing, and pressing machine is ________.

A. 0.05 to 0.10

Attached to the rear end of the crankshaft is the ________.

B. flywheel

Flywheel is also known as ________.

A. Balance wheel

The kind of energy stored in the flywheel is ________.

B. kinetic energy

The function of the flywheel is _________.

D. all of the above

In many flywheel designs about _______ per cent of the weight is concentrated in the hub and arms.

B. 30

A large rotary machine parts whose function is to store energy and to produce uniform angular velocity of the shaft of reciprocating engine is known as _________.

C. Flywheel

A massive wheel which by its inertia assists in securing uniform motion of machinery by resisting sudden changes of speed.

C. Flywheel

The function of a flywheel is to ___________.

B. complete the unuseful stroke

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問題一覧

A heavy rotating body which serves as a reservoir for absorbing and redistributing kinetic energy.

C. Flywheel

Which of the following is not the use of spring?

B. Measure the thickness

The ratio of mean diameter of coil over the coil diameter is known as ________.

C. Spring index

The overall length of the spring when it is compressed until all adjacent coils touched.

D. Solid length

The length of coil spring under no load is known as ________.

B. Free length

In general, steel springs are made of relatively high carbon steel usually ________.

D. more than 0.5 %

When heat-treated wire is coiled cold it should be stress relieved for bending stresses after cooling by being heated at some _______.

B. 500°F

A low cost spring material, suitable where service is not severe and dimensional precision is not needed.

A. Hard drawn wire spring

A hard drawn also 80% reduction but it is made of high-grade steel

B. Music wire

A spring wire with good quality for impact loads and moderately high temperature is known as ________.

A. Chromium silicon

A type of coil where the helical coil is wrapped into a circle foming an annular ring.

D. Garter spring

A type of spring where thin fat strip wound up on itself as a plane spiral, usually anchored at the inside.

C. Motor spring

A type of spring made in the form of a dished washed

A. Belleville spring

In laminated spring the strips are provided in different lengths for _______.

A. economy

An elastic stored energy machine element that when released, will recover its basic form.

D. Spring

When a spring is made of ductile material the curvature factor would be ________.

C. unity

The solid length plus the clearance plus the maximum deflection is called _________.

B. Free length

The majority of coils springs are made of coil tempered carbon steel wire containing carbon.

D. 0.60 to 0.70

Experimental results indicate that the actual frequency of the spring is from ______.

B. 10 to 15 %

According to W.M. Griffith the critical frequency of the spring should behold at least _________ times the frequency of application of a periodic load.

D. 20

The actual number of coil is _________ in a squared and ground ends.

B. n + 2

The solid length of squared ends is ______.

A. (n + 3)d

The free length of ground ends is ________.

D. np

The shortest length for the spring during normal operation is known as __________.

C. Operating length

The relationship between the force exerted by a spring and its deflection is called _______.

C. spring rate

The ratio of the mean diameter of the spring to the wire diameter is called __________.

C. spring index

Refers to the axial distance from a point on one coil to the corresponding point on the next adjacent coil.

B. Pitch

The spring index for general industrial uses should be ________.

D. 8 to 10

The spring index of valve and clutch is ________.

B. 5

Refers to the space between adjacent coils when the spring is compressed to its operating length.

B. Coil clearance

The most practical spring designs produce a pitch angle is less than _________.

A. 12°

Engine valves get shut by means of _________.

D. valve spring

Which of the following material to be used for leaf and coil springs?

D. AISI 4063

The length of a coil spring times the effective number of coil is called _______.

A. active length

For springs subjected to light service, the factor of safety of _______ is suggested.

A. 1.5

Refers to a flat or curved made of thin superimposed plates and forming a cantilever or beam of uniform strength.

D. Laminated spring

Cross wire grooves are types which __________.

A. absorb shocks because of road unevenness

The ___________ of parallel connection of spring is always constant.

A. elongation

Speedometer drive is generally taken from ________.

C. front wheel

The device for smoothing out the power impulses from the engine is known as ______.

C. flywheel

Typical hub length falls between _________.

B. 1.25D to 2.4 D

The recommended coefficient of fluctuation of flywheels for punching, shearing, and pressing machine is ________.

A. 0.05 to 0.10

Attached to the rear end of the crankshaft is the ________.

B. flywheel

Flywheel is also known as ________.

A. Balance wheel

The kind of energy stored in the flywheel is ________.

B. kinetic energy

The function of the flywheel is _________.

D. all of the above

In many flywheel designs about _______ per cent of the weight is concentrated in the hub and arms.

B. 30

A large rotary machine parts whose function is to store energy and to produce uniform angular velocity of the shaft of reciprocating engine is known as _________.

C. Flywheel

A massive wheel which by its inertia assists in securing uniform motion of machinery by resisting sudden changes of speed.

C. Flywheel

The function of a flywheel is to ___________.

B. complete the unuseful stroke