Elements 6

A type of bolt intended for use in bolting wooden parts together or wood to metal. It has a short portion of shank just underneath a round head, which is designed to keep the bolt from turning in the wood when the nut is tightened.
A. u-bolt
B. carriage bolt
C. eye bolt
D. stud bolt

A kind of bolts which has no head an instead has threads on both ends.
A. stud bolts
B. acme threaded bolts
C. square threaded bolts
D. hex bolts

The crest diameter of a screw thread is same as:
A. pitch diameter
B. minor diameter
C. major diameter
D. base diameter

In a standard coarse thread bolt, the stress concentration is maximum at
A. all over the surface
B. Top surface
C. Root
D. Flank

Type of bolt commonly used in the construction that is threaded in both ends.
A. hex bolt
B. stud bolt
C. square threaded bolts
D. eye bolt

Which of the type of chain is used in motorcycle?
A. silent
B. pintle
C. bush roller
D. long

Belt slip may take place because of
A. loose load
B. heavy belt
C. driving pulley too small
D. all of these

Which of the following describes the "slip" in belt drive?
A. loss in power
B. difference between the angular velocities of two pulleys
C. difference between linear speed of the rim
D. difference between the linear speed of the rim of pulley and the belt on it.

Types of V-belts to use in a driving pulley with speed of 360 pm and transmitting 5 Hp.
A. type A belts
B. type B belts
C. type C belts
D. type D belts

Speedometer drive is generally taken from
A. gear box
B. fan belt
C. flywheel
D. Front wheel

A kind of thread that is for general used.
A. UNEC
B. UNC
C. UNF
D. UNEF

V-Belts operate efficiently at speed of about
A. 4500
B. 4400
C. 4200
D. 3600

It is advised that in rubber belts application / mounting, It should have an initial tension of_______ inch/ply.
A. 18 to 24
B. 15 to 20
C. 12 to 15
D. 10

In shear pin or breaking pin design, we may use the data experienced by Link-Belt for 1/8 inch to 1 inch pins and the breaking stress is ______ksi.
A. 40
B. 55
C. 50
D. 48

Considering a maximum safe center distance of sprockets should be——
pitches. Very long center distance cause catenary tension in the chain.
A. 70
B. 80
C. 60
D. 50

Length of contact between two mating parts in a screw and nut threads measured axially is called
A. arc of contact
B. depth of engagement
C. length of engagement
D. axis of contact

Major and minor diameters are commonly used in
A. screw thread
B. bolts
C. gear
D. all of these

The nominal diameter of the bolts is the
A. major diameter
B. minor diameter
C. mean diameter
D. all of these

A kind of thread in which the width of the thread is approximately equal to the depth of the thread and the space between threads are approximately equal.
A. Square thread
B. Acme thread
C. Buttress thread
D. Whitworth thread

It is recommended not to have a direct drive and drive sprockets' if the ratio of their teeth exceeds use two or more step combination.
A. 10 times
B. 8 times
C. 5 times
D. 6 times

It is recommended for high speed application that the minimum number of teeth in small sprocket should be
A. 26 to 30
B. 12 to 16
C. 26 to 28
D. 18 to 24

Flat leather belting NOT recommended for use in speed excess of ——
_ fpm.
A. 3600
B. 4800
C. 6000
D. all of these

The angle included between the sides of the thread measured in an axial plane in a screw thread.
A. angle of thread
B. angle between thread or 40°
C. helix angle thread
D. half angle thread or 20°

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

is the theoretical profile of the thread for a length of one pitch in the axial plane on which 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

—— thread is used where the thread requires great strength and usually cut square on one side and slanting on the other side
A. janno
B. buttress
C. square
D. Double

What type of leather belting should be used at an ambient temperature above 140°F and possible acid liquid coming in contact with the belt?
A. mineral tanned
B. combination of oak
C. oak tanned
D. none of these

Surface connecting the crest and roots of the screw thread.
A. lead angle
B. length of engagement
C. top land
D. flank

How do you call the conical surface at the starting end of the thread?
A. pitch cone
B. chamfer
C. crest
D. flute

It is a type of bolt finished all over and has usually having coarse threads.
A. coupling bolt
B. stud bolt
C. machine bolt
D. automobile bolt

It is a type of bolt distinguished by a short portion of the shank underneath the head being square or finned or ribbed.
А. coupling bolt
В. stud bolt
C. machine bolt
D. carriage bolt

It is a type of bolt threaded on both ends and can be used where a through bolt impossible.
A. coupling bolt
В. carriage bolt
C. stud bolt
D. machine bolt

It is a cheap variety of bolt made in small sizes,
A. stud bolt
B. stove bolt
C. machine bolt
D. coupling bolt

A screw that requires positive torque to lower the load, or to loosen the screw if it has been turned tight against a resistance.
A. power screw
B. lock screw
C. self screw
D. self-locking screw

What is the usual density of the leather belt?
A. 0.035 Ib/in. 3
B. 0.0135 lb/in.3
C. 0.025 Ib/in. 3
D. 0.0465 lb/in. 3

Which of the following is the approximate density of a flat rubber belt?
A. 0.055 Ib/in. 3
B. 0.0135 lb/in.3
C. 0.045 Ib/in. 3
D. 0.0465 lb/in. 3

The breaking strength of oak-tanned beltings varies from 3 to more than
A. 5 ksi
B. 6 ksi
C. 7 ksi
D. 9 ksi

Experience suggests that the most economical designs are obtained for a belt speed of
A. 6000 to 7500 fpm
B. 3000 to 5000 fpm
C. 3500 to 4700 fpm
D. 5000 to 1000 fpm

The tension in the belt due to centrifugal force increasing rapidly above about
A. 2500 fpm
В. 3000 fpm
C. 3500 fpm
D. 4000 fpm

What is the recommended speed for leather belts?
A. 6000 to 7000 fpm
B. 5000 to 6000 fpm
C. 7000 to 8000 fpm
D. 4500 to 5600 fpm

What is the usual recommended speed for fabric belts?
A. 4000 to 5000 fpm
B. 3000 to 4000 fpm
C. 2000 to 3000 fpm
D. 2000 and more fpm

Which of the following is the recommended initial tension of the belt?
A. 75 lb/in of width
B. 73 lb/in of width
C. 71 Ib/in of width
D. 80 lb/in of width

What is the minimum number of teeth on a smaller sprocket for low speed?
A. 12
В. 21
C. 17
D. 14

What is the minimum number of teeth on a smaller sprocket for moderate speed?
A. 17
B. 21
C. 12
D. 14

What is the usual minimum number of teeth on a smaller sprocket for high speed?
А. 21
В. 24
C. 12
D. 14

It is the process that cold works a limited amount of material, thus giving a higher strength, and it leaves a surface compressive stress.
A. surface finishing
B. tensioning
C. surfacing
D. surface rolling

It is the diameter of the imaginary cylinder that bounds the crest of an external thread and the roots of an internal thread.
A. mean diameter
B. root diameter
C. stress diameter
D. major diameter

It is the distance in inches a screw thread (a helix) advances axially in one turn.
A. pitch
B. mean pitch
C. lead
D. circular pitch

Which of the following bolts is recommended for general use?
A. UNC
B. UNEF
C. UNF
D. NC

Which of the following is frequently used bolt in automotive and aircraft industries.
A. UNC
B. UNEF
C. UNF
D. NC

Which of the following is a particular bolt used in aeronautical equipment.
A. UNC
B. UNEF
C. UNF
D. NC

What type bolt usually used for high-pressure pipe flanges, cylinder head studs etc.
A. UNC
B. UNF
C. UNEF
D. 8 UN

It is the stress or load induced by the tightening operation.
A. initial stress
B. initial tension
C. residual stress
D. none of these

It is a screw fastening with a nut on it.
A. Bolt
B. U - bolt
C. Rivet
D. Screw

A fastening which has no nut and turns in to a threaded hole.
A. bolt
B. fastener
C. rivet
D. screw

An old name for an unfinished through bolt comes with a square.
A. coupling bolt
B. stud bolt
C. machine bolt
D. automobile bolt

It is the distance measure axially from a point on one thread to the corresponding point on an adjacent thread.
A. Axial pitch
B. Z- pitch
C. Lead
D. Lead angle

It is the angle between a tangent to the pitch helix and plane normal to the axis of the screw.
A. helix angle
B. lead angle
C. tangent angle
D. vertical angle

It is suggested that the design factor on the yield strength be about 1.5 for the smooth load, about 2 to 2.25 for minor shock loading , and up to——-
for severe shock loads, especially when the loading reverses during operation.
A. 4.5
B. 3.5
C. 3.0
D. 4.0

The recommended net belt pull for rubber belt is:
A. 11.34 Ib/ply per inch of width
B. 13.75 Ib/ply per inch of width
C. 16.35 Ib/ply per inch of width
D. 20.34 lb/ply per inch of width

For minimum quietness, use sprockets with —— or more teeth.
A. 21
B. 23
C. 25
D. 27

Wire ropes are made from cold-drawn with —— or more teeth.
A. 21
B. 23
C. 25
D. 27

Which of the following bolts provided with a hole at one end instead of usual head.
А. Stud Bolt
B. Eye Bolt
C. Machine Bolt
D. Stove Bolt

64. Too much ——in a flat belt operation tend to cause excessive wear slippage and may burn the belt.
A. play
B. slack
C. stiffness
D. tightness

65. Which of the following is not recommended for use in a driving speed exceeding 2000 ft/mini?
A. Flat leather belt
В. Herringbone gear
C. Silent sprocket
D. V-belt

66. For longer sprocket chain life the speed range of —- fpm is recommended.
A. 1200-1400
B. 1500-1600
C. 1800-2000
D. 2000-2100

The maximum recommended ideal number of teeth to use for bigger sprocket is
A. 120
B. 127
C. 132
D. 143

A bolt for general application that possessed a stronger thread is a type of
_ screw.
A. BUN
B. UNC
C. UNEF
D. WOOD

As a rule the center to center distance between sprocket should not be less than—- times the diameter of the bigger sprocket and not less than 30 times the pitch nor more than about 50 times to pitch.
A. 1.5
B. 2
C. 2.5
D. 3

Flat belt that is too tight will induce strain on the bearing and belt—-
A. life will be shortened
B. result to uneconomical operation
C. suffer/shatter
D. will be sheared/cut

The most commonly-used series in the bulk production of bolts, screws, nuts and other general applications in the coarse-thread series.
A. UNC
B. UNF
C. White Iron
D. Lead

Which of the following material(s) is recommended for large sprocket of large speed ratio and having fewer engagement?
A. nickel-chromium steel
B. copper
C. cast iron
D. aluminum

The distance from a point on a screw thread to a corresponding point on an adjacent thread, measured parallel to the axis.
A. pitch
B. lead
C. thread
D. crest

The top surface joining the two sides of a thread.
A. pitch
B. crest
C. lead
D. space

Which of the following is not a standard thread form?
A. Square
B. Double flute
C. American National
D. 60 deg. sharp V

In threaded members, which of the following defines N.C. ?
A. neutral cut
B. national' cut
C. national coarse
D. not center

In threaded members, which of the following represents N. F.?
A. national file
B. neutral file
C. national fine
D. not found

The distance from a point on a screw thread to a corresponding point on the next thread measure along the axis.
A. flank
B. crest
C. lead
D. pitch

A ridge of uniform section in the form of a helix cut around the circumference of a cylinder and advancing along the axis.
A. thread roots
B. screw threads
C.helix thread
D. chamfers

It is ideal for maximum quietness in sprockets drive operation to choose—-
or more teeth.
A. 24
B. 27
C. 18
D. 21

Which of the following is not a type of bolt?
A. stud bolt
B. steel bolt
C. machine bolt
D. coupling bolt

It is a locking device that is used to maintain pressure between threads of the bolt and nut.
A. gasket
B. lock washer
C. lock nuts
D. filler

What is the large wood screw used to fasten machinery and equipment.
A. lag screw
B. loss screw
C. wood screw
D. cross screw

Too much —— in a flat belt operation tend to cause excessive wear slippage and may burn the belt.
A. load
B. lack
C. usage
D. tightness

The general accepted limit of diamond wheel speed should be in the range of — fpm.
A. 1000/2000
B. 2500/3500
C. 3000/4000
D. 5000/6000

In a —-design, the lead of a single thread is equal to the pitch.
A. bevel gear
B. bolt
C. helical gear
D. hypoid gear

It is the distance in inches a screw thread (a helix) advances axially in one turn.
A. crest
B. mean pitch
C. lead
D. circular pitch

On high speed centrifugal blowers, it has been observed that the arc of contact is reduced from, 180° at rest to —
in motion.
А. 100°
В. 90°
C. 95°
D. 110°

If two intersecting shafts are to be belt connected —- guide pulleys are to be used.
A. 1
B. 2
C. 3
D. 4

What type of compound screw which produces a motion equal to the difference in motion between the two component screws.
A. Machine Screw
B. Tanden Screw
C. Differential Screw
D. Variable Screw

What is the included angle for BA (British Association) thread ?
A. 29°
В. 47.5°
C. 45°
D. 60°

The distance between the crest and the base of the thread, measured perpendicular to the axis.
A. Axis of thread
B. Depth of engagement
C. Depth of thread
D. Length of engagement

Which of the following is the usual range of the included angle for V-belt drive?
A. 10° - 25°
B. 30° - 40°
C. 25° - 30°
D. 40° - 50°

For high speed application the minimum number of teeth in small sprocket should be —-
A. 18 to 24
B. 26 to 30
C. 14 to 18
D. 24 to 28

Commonly used/produced screws/ bolts/nuts and for engineering applications is a ___ series.
A. UNC
B. ANSI
C. withworth
D. UNF

The diameter of the washer is generally
A. equal to the diameter of the bolt
B. slightly more than the diameter of the bolt
C. slightly less than the diameter of the bolt
D. of any size that suits the application

Pitch diameter less the diameter of the roller chain is equal to
A. top land
B. addendum
C. bottom diameter
D. face overlap

What is the maximum efficiency of self-locking screw?
A. 75%
В. 50 %
C. 70%
D. 80 %

A screw is specified by its
A. Minor diameter
B. Mean diameter
C. Major diameter
D. Pitch diameter

What is the included angle for ACME thread?
A. 29°
B. 47.5°
C. 45°
D. 60°