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4

Crushing resistance required to crush the rivet per pitch length is

A. p.d.σc

B. p.t.σc

C. n.d.t.σc

D. (p - d) t.σc

Correct Answer :

C. n.d.t.σc


Related Questions

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4

The design of shafts made of brittle materials is based on

A. Guest's theory

B. Rankine's theory

C. St Venant's theory

D. Von Mises theory

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4

In order to permit the thermal expansion/contraction of tubing, it should be

A. Crimped

B. Honed

C. Flared

D. Bent

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4

When carbon in the cast iron is principally in the form of graphite, the cast iron will be of

A. Brown colour

B. Yellow colour

C. White colour

D. Grey colour

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4

For tight leakage joints, following type of thread is best suited

A. Metric

B. Buttress

C. Square

D. NPT (national pipe threads)

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4

The draw of cotter need not exceed

A. 3 mm

B. 5 mm

C. 10 mm

D. 20 mm

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4

The stress induced in the belt is,

A. Tensile stress

B. Compressive stress

C. Direct shear stress

D. Torsional shear stress

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4

In a flange coupling, the flanges are coupled together by means of

A. Bolts and nuts

B. Studs

C. Headless taper bolts

D. None of these

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4

The taper on a rectangular sunk key is

A. 1 in 16

B. 1 in 32

C. 1 in 48

D. 1 in 100

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4

Which of the following screw thread is used for power transmission in one direction only?

A. Square threads

B. Multiple threads

C. Acme threads

D. Buttress threads

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4

When the fulcrum is in between the load and effort, the lever is said to be of

A. First type

B. Second type

C. Third type

D. Any one of these

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4

The strap end of a connecting rod of steam engine is joined by

A. Gib of cotter joint

B. Sleeve and cotter joint

C. Spigot socket cotter joint

D. Knuckle joint

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4

Crowning on pulley helps

A. In decreasing the slip of the belt

B. In increasing the slip of the belt

C. To keep the belt in centre on a pulley while it is in motion

D. To increase pulley life

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4

Which is correct statement? Stress concentration in static loading is

A. Very serious in brittle materials and less serious in ductile materials

B. Very serious in ductile materials and less serious in brittle materials

C. Equally serious in both types of materials

D. Seriousness would depend on other factors

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4

Set screws are

A. Similar to small size tap bolts except that a greater variety of shapes of heads are available

B. Slotted for a screw driver and generally used with a nut

C. Used to prevent relative motion between parts

D. Similar to stud

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4

In case of V-belt drive

A. The belt should touch the bottom of groove in the pulley

B. The belt should not touch the bottom of groove in the pulley

C. The belt should not touch the sides of groove in the pulley

D. None of the above

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4

The ratio of the ultimate stress to the design stress is known as

A. Elastic limit

B. Strain

C. Factor of safety

D. Bulk modulus

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4

If T is the actual number of teeth on a helical gear and φ is the helix angle for the teeth, then formative number of teeth is written as

A. T sec3φ

B. T sec²φ

C. T/sec3φ

D. T cosecφ

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4

The acme threads are usually found on

A. Spindles of bench vices

B. Railway carriage couplings

C. Feed mechanism of machine tools

D. Screw cutting lathes

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4

Spring stiffness is

A. Ratio of coil diameter to wire diameter

B. Load required to produce unit deflection

C. Its capability of storing energy

D. Its ability to absorb shocks

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4

Split nut is a locking device in which

A. One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

B. A slot is cut partly in middle of nut and then slot reduced by tightening screw

C. A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip

D. Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at the other end

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4

Screws used for power transmission should have

A. Very fine threads

B. High efficiency

C. Low efficiency

D. Strong teeth

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4

Which is correct statement? Stress concentration in cyclic loading is

A. Very serious in brittle materials and less serious in ductile materials

B. Very serious in ductile materials and less serious in brittle materials

C. Equally serious in both types of materials

D. Seriousness would depend on other factors

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4

In a flange coupling, the bolts are subjected to

A. Tensile stress

B. Compressive stress

C. Shear stress

D. None of these

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4

Stress concentration in static loading is more serious in

A. Ductile materials

B. Brittle materials

C. Equally serious in both cases

D. Depends on other factors

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4

In a full journal bearing, the angle of contact of the bearing with the journal is

A. 120°

B. 180°

C. 270°

D. 360°

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4

When the shaft rotates in anticlockwise direction at slow speed in a bearing, it will

A. Have contact at the bottom most of the bearing

B. Move towards right of the bearing making no metal to metal contact

C. Move towards right of the bearing making the metal to metal contact

D. Move towards left of the bearing making metal to metal contact

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4

Whether any core is required in wire ropes

A. Yes

B. No

C. Sometimes

D. Rarely

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4

The square threads are usually found on

A. Spindles of bench vices

B. Railway carriage couplings

C. Feed mechanism of machine tools

D. Screw cutting lathes

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4

Cast iron pipes are mainly used

A. For conveying steam

B. In water and sewage systems

C. In pressure lubrication systems on prime movers

D. All of the above

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4

The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by (where T = Number of teeth on the sprocket)

A. p = D sin (90°/T)

B. p = D sin (120°/T)

C. p = D sin (180°/T)

D. p = D sin (360°/T)