Home
Current Affairs January 2024

What is the correct answer?

4

The included angle between the sides of V-belt is

A. 40°

B. 45°

C. 38°

D. 60°

Correct Answer :

A. 40°


Related Questions

What is the correct answer?

4

Pick up wrong statement. Fatigue strength can be increased by

A. Cold working

B. Shot peening

C. Grinding and lapping surface

D. Hot working

What is the correct answer?

4

Which of the following statement is correct?

A. The distance from a point on one thread to the corresponding point on the next thread is called pitch

B. The distance which a screw thread advances axially in one rotation of the nut is called lead

C. In single start threads, lead is equal to pitch

D. All of the above

What is the correct answer?

4

The maximum normal stress theory is used for

A. Plastic materials

B. Brittle materials

C. Non-ferrous materials

D. Ductile materials

What is the correct answer?

4

The cam follower extensively used in aircraft engines is

A. Knife edge follower

B. Flat faced follower

C. Spherical faced follower

D. Roller follower

What is the correct answer?

4

The constant factor in case of R10 series of preferred numbers is

A. 1.06

B. 1.12

C. 1.26

D. 1.58

What is the correct answer?

4

The toughness of a material _________ when it is heated

A. Does not change

B. Increases

C. Decreases

D. None of the Above

What is the correct answer?

4

Ball bearing type screws are found in following application

A. Screw jack

B. Aeroplane engines

C. Crane

D. Steering mechanism

What is the correct answer?

4

The connecting rod bolts are tightened up so that tightening stress

A. Is just sufficient to hold parts together

B. Approaches yield point

C. Is 50% of yield point

D. Is about yield point divided by safety factor

What is the correct answer?

4

In a marine flange coupling, the thickness of flange is taken as

A. d/2

B. d/3

C. 3d/4

D. d/4

What is the correct answer?

4

A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is

A. 2000 N-m

B. 2050 N-m

C. 2100 N-m

D. 2136 N-m

What is the correct answer?

4

A screw is said to be over hauling screw, if the

A. Friction angle is less than helix angle

B. Friction angle is more than helix angle

C. Friction angle is equal to helix angle

D. Efficiency of screw is 100%

What is the correct answer?

4

A double strap butt joint (with equal straps) is

A. Always in single shear

B. Always in double shear

C. Either in single shear or double shear

D. Any one of these

What is the correct answer?

4

Two helical springs of the same material and of equal circular crosssection, length and number of turns, but having radii 80 mm and 40 mm, kept concentrically (smaller radius spring within the larger radius spring), are compressed between two parallel planes with a load W. The inner spring will carry a load equal to

A. W/2

B. 2W/3

C. W/9

D. 8W/9

What is the correct answer?

4

When the belt is transmitting maximum power,

A. The tension in tight side is twice the centrifugal tension

B. The tension in slack side is equal to the centrifugal tension

C. The tension in tight side is thrice the centrifugal tension

D. None of the above

What is the correct answer?

4

In V-belt drive, belt touches

A. At bottom

B. At sides only

C. Both at bottom and sides

D. Could touch anywhere

What is the correct answer?

4

For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be

A. 8

B. 6

C. 4

D. 10

What is the correct answer?

4

Two shafts will have equal strength, if

A. Diameter of both the shafts is same

B. Angle of twist of both the shafts is same

C. Material of both the shafts is same

D. Twisting moment of both the shafts is same

What is the correct answer?

4

A double fillet welded joint with parallel fillet weld of length l and leg s is subjected to a tensile force P. Assuming uniform stress distribution, the shear stress in the weld is given by

A. √2P/s.l

B. P/2.s.l

C. P/√2.s.l

D. 2P/s.l

What is the correct answer?

4

Idler pulley is used for

A. Increasing velocity ratio

B. For applying tension

C. Changing the direction of motion of belt

D. All of these

What is the correct answer?

4

According to Indian standard specifications, 100 H6/g5 means that

A. Tolerance grade for the hole is 6 and for the shaft is 5

B. Tolerance grade for the shaft is 6 and for the hole is 5

C. Tolerance grade for the shaft is 4 to 8 and for the hole is 3 to 7

D. Tolerance grade for the hole is 4 to 8 and for the shaft is 3 to 7

What is the correct answer?

4

When the bolt is very yielding as compared to the connected members, then the resultant load on the bolt will be equal to the

A. Initial tension

B. External load applied

C. Sum of the initial tension and external load applied

D. Initial tension or external load, whichever is greater

What is the correct answer?

4

The standard length of the shaft is

A. 6 m

B. 5 m

C. 7 m

D. All of these

What is the correct answer?

4

A tapered key which fits in a key-way in the hub and is flat on the shaft, is known as

A. Woodruff key

B. Feather key

C. Flat saddle key

D. Gib head key

What is the correct answer?

4

The resilience of a bolt may be increased by

A. Increasing its shank diameter

B. Increasing its length

C. Decreasing its shank diameter

D. Decreasing its length

What is the correct answer?

4

Which of the following statement is correct, for two shafts connected in parallel?

A. Torque in each shaft is the same

B. Shear stress in each shaft is the same

C. Angle of twist of each shaft is the same

D. Torsional stiffness of each shaft is the same

What is the correct answer?

4

The backlash for spur gears depends upon

A. Module

B. Tooth profile

C. Both module and pitch line velocity

D. Pitch line velocity

What is the correct answer?

4

The velocity factor for very accurately cut and ground metallic gears operating at velocities upto __________ are equal to 6/(6 + v).

A. 10 m/s

B. 12.5 m/s

C. 15 m/s

D. 20 m/s

What is the correct answer?

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

What is the correct answer?

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

What is the correct answer?

4

The width of the pulley should be __________ width of the belt.

A. Equal to

B. Less than

C. Greater than

D. None of these