The efficiency of flat belt drive is 35%. If all the parameters are same and flat belt is replaced by V belt, than the efficiency of V belt will be?

<35%

>35%

=35%

Cant be determined

The efficiency of flat belt drive is more that V belt drive.

In a flat belt drive, if the slip between the driver and belt is 1%, between the belt and follower is 3% and driver and follower pulley diameters are equal, then velocity ratio of the drive will be

0.96

0.97

0.98

0.99

The advantages of the V-belt drive over flat belt drive are

The V-belt drive gives compactness due to the small distance between the centres of pulleys.

The drive is positive, because the slip between the belt and the pulley groove is negligible.

Since the V-belts are made endless and there is no joint trouble, therefore the drive is smooth.

all of the mentioned

The disadvantages of the V-belt drive over flat belt drive are

The V-belt drive cannot be used with large centre distances.

The V-belts are not so durable as flat belts.

The construction of pulleys for V-belts is more complicated than pulleys for flat belts.

all of the mentioned

L is older than M and taller than N. O is younger than P, older than N and shorter than Q. R is older than S, younger than N, shorter than S and taller than Q. S is older than L, M, O, P, Q, R and S is necessarily false?

O is the shortest of the group.

N is the second tallest of the group.

L is the tallest of the group.

Q is the third oldest of the group.

The ratio of belt tensions $$\frac{{{{\text{p}}_1}}}{{{{\text{p}}_2}}}$$ considering centrifugal force in flat belt is given by where,
m = mass of belt per meter (kg/m)
v = belt velocity (m/s)
f = coefficient of friction
$$\alpha $$ = angle of wrap (radians)

$$\frac{{{{\text{p}}_1} - {\text{m}}{{\text{v}}^2}}}{{{{\text{p}}_2} - {\text{m}}{{\text{v}}^2}}} = {{\text{e}}^{{\text{f}}\alpha }}$$

$$\frac{{{{\text{p}}_1}}}{{{{\text{p}}_2}}} = {{\text{e}}^{{\text{f}}\alpha }}$$

$$\frac{{{{\text{p}}_1}}}{{{{\text{p}}_2}}} = {{\text{e}}^{ - {\text{f}}\alpha }}$$

$$\frac{{{{\text{p}}_1} - {\text{m}}{{\text{v}}^2}}}{{{{\text{p}}_2} - {\text{m}}{{\text{v}}^2}}} = {{\text{e}}^{ - {\text{f}}\alpha }}$$

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?

as a master

as a secondary

as a slave

as a primary

as auto-select

h,J,K,L,M,N and O are the only legislators eligible to vote on Bills 1,2 and 3, each of which will be passed if at least four legislators eligible vote in favor of it. each legislator must vote on all three bills; on abstentions are possible. The following is known : H must vote against all three bills; each of the other legislators must vote in favor of at least one bill and against at lest one bill. j must vote against Bills 1. O Must vote against Bills 2 and 3. L must the same way that K dose on all three bills.*N must vote the same way that O dose on all three bills. If M votes the same way that O dose on all three bills, which of the following can be determined ?

Bill I will be passed

Bill I will be defeated

Bill 2 will be passed

Bill 2 will be defeated

In the number 76534218 each digit is replaced next digit, ie '1' is replaced by '2' , '2' is replaced by '3' and so on and then the digits are arranged in ascending order from left to right, which digit will be fifth from the left end?

When the belt is transmitting maximum power, the belt speed should be
(Where, m = mass of belt per meter (kg/m) and Pmax = maximum permissible tension in belt (N))

$$\sqrt {\frac{{{\text{P}}\max }}{{2{\text{m}}}}} $$

$$\sqrt {\frac{{{\text{P}}\max }}{{3{\text{m}}}}} $$

$$\sqrt {\frac{{{\text{P}}\max }}{{\text{m}}}} $$

$$\sqrt {\frac{{{\text{3m}}}}{{{\text{P}}\max }}} $$

In the given numbers, if in each number first digit is replaced by the third digit, second digit is replaced by the first digit and third digit is replaced by the second digit then which number will be the biggest? 653 749 872 933 541

933

872

749

653