Question 1. Which of the following would be used for the highest temperature mea

Question

Question 1. Which of the following would be used for the highest temperature measurements ?

Thermistor

Thermocouple

IC temperature sensor

RTD

Question 2. Suppose a liquid level ranging from 5.5 to 8.6 m is linearly converted to pneumatic pressure ranging from 3 to 15 psi. What pressure will result from a level of 7.2 m ?

9.94 psi

9.55 psi

9.60 psi

9.58 psi

Question 3.Given a platinum RTD with a temperature coefficient of 0.00392 and an original resistance of 150 at 0°C, find the resistance at 75°C.

159.6

182.7

114.3

194.1

Question 4. An open-loop control system has all the following except?

actuator

controller

sensor

process

Question 5. The controlled variable in a closed-loop system is the direction of a robot arm. Initially it is at 10o; then it is commanded to go to 35o. What is the set point?

35o

10o

25o

50o

Question 6. Which of the following is a closed-loop system?

Turning on the lights in a house at 6 p.m., and turning them off at 6 a.m.

Turning the heater off when the temperature reaches 68o or above.

Pumping water out of the ground.

Setting the alarm to 8 a.m.

Question 7. Find the current in a ground loop that is 250 m long, has a wire resistance of 0.04 ohms/m, and has a difference of 5 V between grounds.

0.500

0.578

0.673

0.558

Question 8. Find the gain in decibels of an amplifier that has a straight voltage gain of 7000.

71.8

74.2

75.3

76.9

Question 9. Find the total voltage drop in 200, #20 twisted pair wire circuit carrying 100 mA. The wire has a resistance of 10.15 Ohms per 1000 ft of wire. (Hint: the signal has to go out 200 ft and back)

1.6 V

0.6 V

0.4 V

1.3 V

Question 10. A proportional controller for a rotating antenna has a gain Kp of 5 in-oz/deg. The antenna was initially pointing due south, but was then commanded to point southeast. Find the initial torque supplied to the antenna.

271 in-oz

229 in-oz

227 in-oz

225 in-oz

Question 11.A proportional control system is to be used to control the wing flap of a jet airplane. The wind load is expected to cause as much as 600 in-lb of torque. The system should be able to keep the flaps with 5o of the set point. Find the gain Kp necessary to meet these requirements.

300 in-lbs

240 in-lbs

120 in-lbs

60 in-lbs

Explanation / Answer

1.thermocouple

2. 9.58psi

3.114.3

4. sensor

5.25o

6.Turning the heater off when the temperature reaches 68o or above

7.0.578

8.75.3

9.1.6v

10.227 in-oz

11.240 in-lbs

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.