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Assertion (A): Servomotors have heavier rotors and lower R/X ratio as compared to ordinary motors of similar ratings. Reason (R): Servomotor should have smaller electrical and mechanical time constants for faster response.

Correct Answer: A is false but R is true
Ac servomotors are essentially induction motor with low X/R ratio for the rotor which has very low inertia.

Consider the following servomotors: 1. AC-two phase servomotor 2. DC servomotor 3. Hydraulic servomotor 4. Pneumatic servomotor The correct sequence of these servomotor in increasing order of power handling capacity is:

Assertion (A): DC servomotors have practically taken over from AC servomotors in most control application. Reason (R): Low brush commutator friction and still higher torque/inertia have been achieved in DC servomotors.

Direction-The question have two statements.
One is labelled as Assertion (A) and the other as Reason (R). You have to examine both the statements carefully and decide whether Assertion (A) and Reason (R) separately are true and if so then reason is the correct explanation of the assertion. Mark these items on the answer sheet.
Assertion (A): Interest payable on working capital should be treated as an item of operating expenses.
Reason (R): Interest is the cost of capital used in the business.

Assertion (A): DC servomotors are more commonly used in armature controlled mode than field controlled mode. Reason (R): Armature controlled Dc motors have higher starting torque than fiels controlled motors.

Which of the following is/are appropriate care and maintenance of centrifuges? I. Proper balancing of centrifuge tubes. II. Avoid long time exposure of the rotors to alkaline solution and acidic buffers. III. Cleaning centrifuges and rotors with coarse brushes and then wash them with distilled or de-ionized water after every run. IV. For overnight storage, the rotors are left upside down and then positioned in a safe and dry place.

The question contains two statement. One is Assertion (A) and the other is Reason (R). You have to examine both the statements carefully and decide whether the Assertion (A) and Reason (R) are separately true? and If so, then Reason is the correct explanation of the Assertion. Mark these items in the balance sheet.
Assertion (A) Balance sheet does not reveal ownership of business.
Reason (R) Assets are just unrefined cost.

Some pairs of devices and associated energy changes are given below.
1. Electric generator ⟺ Mechanical to electrical
2. Electric motor ⟺ Electrical to mechanical
3. Diesel engine ⟺ Light to electrical
4. Solar cell ⟺ Chemical to mechanical
Which of the above pair/s is/are correctly matched?

Determine the corrections or otherwise of the following assertion and reason : Assertion : Taper ratio will affect the weight of wing. Reason: For finite taper ratio, wing thickness will be different at root and tip. and are true and is the correct reason for b) Both and are true but is not the correct reason for c) is true but is false d) is false but is true

Determine the corrections or otherwise of the following Assertion and Reason : Assertion : For longitudinal static stability of an aircraft, slope of moment curve should be negative. Reason: Positive slope will result in more static stability than negative slope. Hence, slope should be positive always. and are true and is the correct reason for b) Both and are true but is not the correct reason for c) is true but is false d) is false but is true

Question : Among T, V, B, E and C, who is the third from the top when arranged in the descending order of their weights ?

Statements :
I. B is heavier than T and C and is less heavier than V who is not the heaviest.
II. C is heavier than only T.