The groove angle of the pulley for rope drive is usually

In a belt drive, the pulley diameter is doubled, the belt tension and pulley width remaining same. The changes required in key will be

A

Increase key length

B

Increase key depth

C

Increase key width

D

Double all the dimensions

A rope 2-.6 meters long cut is into two pieces .If the length of one piece of rope is 2.8 meters shorter than the length of the other , what is the length , in meters, of the longer piece of rope?

A

7.5

B

11.7

C

8.9

D

10.3

A lift of weight W is lifted by a rope with an acceleration f. If the area of cross-section of the rope is A, the stress in the rope is

A

$$\frac{{{\text{W}}\left( {1 + \frac{{\text{f}}}{{\text{g}}}} \right)}}{{\text{A}}}$$

B

$$\frac{{\left( {1 - \frac{{\text{g}}}{{\text{f}}}} \right)}}{{\text{A}}}$$

C

$$\frac{{{\text{W}}\left( {2 + \frac{{\text{f}}}{{\text{g}}}} \right)}}{{\text{A}}}$$

D

$$\frac{{{\text{W}}\left( {2 + \frac{{\text{g}}}{{\text{f}}}} \right)}}{{\text{A}}}$$

m এবং 2m ভরের দুটি আয়তাকার বাক্স একটি ঘর্ষণহীন অনুভূমিক পৃষ্ঠে একটি দড়ি দ্বারা সংযুক্ত। F মাত্রার একটি সম্মুখ বল দ্বারা ভারী বাক্সটিকে ডানদিকে টানা হচ্ছে। ফলে, হালকা বাক্সটি দড়ি দ্বারা টান অনুভব করে। দড়িটিতে টান কত? (Two rectangular boxes of masses m and 2m are on a frictionless horizontal surface and connected by a rope. A forward force of magnitude F is pulling the more massive box toward right. As a result, the less massive box is pulled by the rope. What is the tension in the rope?)

A

F

B

F/6

C

F/3

D

F/2

You are about to install a second IDE hard drive in a PC that has only one IDE adapter. Your first hard drive will still be the boot drive. How should the second drive be configured?

A

as a master

B

as a secondary

C

as a slave

D

as a primary

E

as auto-select

For same pulley diameters, center distance, belt speed and belt and pulley materials,

A

Open belt drive transmits more power than crossed belt drive

B

Crossed belt drive transmits more power than open belt drive

C

Open and crossed belt drives transmit same power

D

Power transmission does not depend upon open and crossed types of constructions

The velocity ratio of a differential pulley block with D and d as the diameters of larger and smaller pulley, is

A

$$\frac{{\text{D}}}{{{\text{D}} - {\text{d}}}}$$

B

$$\frac{{\text{D}}}{{{\text{D}} + {\text{d}}}}$$

C

$$\frac{{2{\text{D}}}}{{{\text{D}} - {\text{d}}}}$$

D

$$\frac{{2{\text{D}}}}{{{\text{D}} + {\text{d}}}}$$

A rope cut into 3 pieces with each piece twice as long as the previous one. If the length of longest piece is 3 meter ,What was the length of the rope in meter ?

A

6.5

B

6

C

5.5

D

5.25

A light rope is loaded with many equal weights at equal horizontal intervals. The points of suspension on the rope lie on a

A

Parabola

B

Catenary

C

Cycloid

D

Ellipse

Pulley in a belt drive acts as

A

cylindrical pair

B

turning pair

C

rolling pair

D

sliding pair

The groove angle of the pulley for rope drive is usually

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